MS-DRG · FY 2026 v43.0

MS-DRG 921 – Complications of Treatment without CC/MCC

A Medical DRG in MDC 21 (Injuries, Poisonings & Toxic Effects of Drugs). Inpatient cases group to DRG 921 when the ICD-10-CM principal diagnosis is one of the 336 codes listed below and no secondary diagnosis on the CC or MCC lists is present. Its FY 2026 relative weight is 0.6884 with a geometric mean length of stay of 2.1 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.6884
Relative Weight
2.1
Geometric Mean LOS (days)
2.5
Arithmetic Mean LOS (days)
336
Principal Diagnosis Codes

Severity family

DRG 919with MCCWeight 1.8308 · GMLOS 4.3 daysDRG 920with CCWeight 1.0023 · GMLOS 2.8 daysDRG 921without CC/MCCWeight 0.6884 · GMLOS 2.1 days
How a case is assigned to DRG 921

The grouper first assigns the case to MDC 21 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with MCC → 919; with CC → 920; without CC/MCC → 921.

ICD-10-CM

Principal Diagnosis Codes 336 codes · 19 categories

336 of 336 shown
D47 Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue1 code
  • D47.Z1 Post-transplant lymphoproliferative disorder (PTLD)
D78 Intraoperative and postprocedural complications of the spleen12 codes
  • D78.01 Intraoperative hemorrhage and hematoma of the spleen complicating a procedure on the spleen
  • D78.02 Intraoperative hemorrhage and hematoma of the spleen complicating other procedure
  • D78.11 Accidental puncture and laceration of the spleen during a procedure on the spleen
  • D78.12 Accidental puncture and laceration of the spleen during other procedure
  • D78.21 Postprocedural hemorrhage of the spleen following a procedure on the spleen
  • D78.22 Postprocedural hemorrhage of the spleen following other procedure
  • D78.31 Postprocedural hematoma of the spleen following a procedure on the spleen
  • D78.32 Postprocedural hematoma of the spleen following other procedure
  • D78.33 Postprocedural seroma of the spleen following a procedure on the spleen
  • D78.34 Postprocedural seroma of the spleen following other procedure
  • D78.81 Other intraoperative complications of the spleen
  • D78.89 Other postprocedural complications of the spleen
E36 Intraoperative complications of endocrine system5 codes
  • E36.01 Intraoperative hemorrhage and hematoma of an endocrine system organ or structure complicating an endocrine system procedure
  • E36.02 Intraoperative hemorrhage and hematoma of an endocrine system organ or structure complicating other procedure
  • E36.11 Accidental puncture and laceration of an endocrine system organ or structure during an endocrine system procedure
  • E36.12 Accidental puncture and laceration of an endocrine system organ or structure during other procedure
  • E36.8 Other intraoperative complications of endocrine system
E89 Postprocedural endocrine and metabolic complications and disorders, not elsewhere classified7 codes
  • E89.810 Postprocedural hemorrhage of an endocrine system organ or structure following an endocrine system procedure
  • E89.811 Postprocedural hemorrhage of an endocrine system organ or structure following other procedure
  • E89.820 Postprocedural hematoma of an endocrine system organ or structure following an endocrine system procedure
  • E89.821 Postprocedural hematoma of an endocrine system organ or structure following other procedure
  • E89.822 Postprocedural seroma of an endocrine system organ or structure following an endocrine system procedure
  • E89.823 Postprocedural seroma of an endocrine system organ or structure following other procedure
  • E89.89 Other postprocedural endocrine and metabolic complications and disorders
G96 Other disorders of central nervous system1 code
G97 Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified9 codes
  • G97.41 Accidental puncture or laceration of dura during a procedure
  • G97.48 Accidental puncture and laceration of other nervous system organ or structure during a nervous system procedure
  • G97.49 Accidental puncture and laceration of other nervous system organ or structure during other procedure
  • G97.51 Postprocedural hemorrhage of a nervous system organ or structure following a nervous system procedure
  • G97.52 Postprocedural hemorrhage of a nervous system organ or structure following other procedure
  • G97.61 Postprocedural hematoma of a nervous system organ or structure following a nervous system procedure
  • G97.62 Postprocedural hematoma of a nervous system organ or structure following other procedure
  • G97.63 Postprocedural seroma of a nervous system organ or structure following a nervous system procedure
  • G97.64 Postprocedural seroma of a nervous system organ or structure following other procedure
H59 Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified58 codes
  • H59.011 Keratopathy (bullous aphakic) following cataract surgery, right eye
  • H59.012 Keratopathy (bullous aphakic) following cataract surgery, left eye
  • H59.013 Keratopathy (bullous aphakic) following cataract surgery, bilateral
  • H59.019 Keratopathy (bullous aphakic) following cataract surgery, unspecified eye
  • H59.031 Cystoid macular edema following cataract surgery, right eye
  • H59.032 Cystoid macular edema following cataract surgery, left eye
  • H59.033 Cystoid macular edema following cataract surgery, bilateral
  • H59.039 Cystoid macular edema following cataract surgery, unspecified eye
  • H59.091 Other disorders of the right eye following cataract surgery
  • H59.092 Other disorders of the left eye following cataract surgery
  • H59.093 Other disorders of the eye following cataract surgery, bilateral
  • H59.099 Other disorders of unspecified eye following cataract surgery
  • H59.111 Intraoperative hemorrhage and hematoma of right eye and adnexa complicating an ophthalmic procedure
  • H59.112 Intraoperative hemorrhage and hematoma of left eye and adnexa complicating an ophthalmic procedure
  • H59.113 Intraoperative hemorrhage and hematoma of eye and adnexa complicating an ophthalmic procedure, bilateral
  • H59.119 Intraoperative hemorrhage and hematoma of unspecified eye and adnexa complicating an ophthalmic procedure
  • H59.121 Intraoperative hemorrhage and hematoma of right eye and adnexa complicating other procedure
  • H59.122 Intraoperative hemorrhage and hematoma of left eye and adnexa complicating other procedure
  • H59.123 Intraoperative hemorrhage and hematoma of eye and adnexa complicating other procedure, bilateral
  • H59.129 Intraoperative hemorrhage and hematoma of unspecified eye and adnexa complicating other procedure
  • H59.211 Accidental puncture and laceration of right eye and adnexa during an ophthalmic procedure
  • H59.212 Accidental puncture and laceration of left eye and adnexa during an ophthalmic procedure
  • H59.213 Accidental puncture and laceration of eye and adnexa during an ophthalmic procedure, bilateral
  • H59.219 Accidental puncture and laceration of unspecified eye and adnexa during an ophthalmic procedure
  • H59.221 Accidental puncture and laceration of right eye and adnexa during other procedure
  • H59.222 Accidental puncture and laceration of left eye and adnexa during other procedure
  • H59.223 Accidental puncture and laceration of eye and adnexa during other procedure, bilateral
  • H59.229 Accidental puncture and laceration of unspecified eye and adnexa during other procedure
  • H59.311 Postprocedural hemorrhage of right eye and adnexa following an ophthalmic procedure
  • H59.312 Postprocedural hemorrhage of left eye and adnexa following an ophthalmic procedure
  • H59.313 Postprocedural hemorrhage of eye and adnexa following an ophthalmic procedure, bilateral
  • H59.319 Postprocedural hemorrhage of unspecified eye and adnexa following an ophthalmic procedure
  • H59.321 Postprocedural hemorrhage of right eye and adnexa following other procedure
  • H59.322 Postprocedural hemorrhage of left eye and adnexa following other procedure
  • H59.323 Postprocedural hemorrhage of eye and adnexa following other procedure, bilateral
  • H59.329 Postprocedural hemorrhage of unspecified eye and adnexa following other procedure
  • H59.331 Postprocedural hematoma of right eye and adnexa following an ophthalmic procedure
  • H59.332 Postprocedural hematoma of left eye and adnexa following an ophthalmic procedure
  • H59.333 Postprocedural hematoma of eye and adnexa following an ophthalmic procedure, bilateral
  • H59.339 Postprocedural hematoma of unspecified eye and adnexa following an ophthalmic procedure
  • H59.341 Postprocedural hematoma of right eye and adnexa following other procedure
  • H59.342 Postprocedural hematoma of left eye and adnexa following other procedure
  • H59.343 Postprocedural hematoma of eye and adnexa following other procedure, bilateral
  • H59.349 Postprocedural hematoma of unspecified eye and adnexa following other procedure
  • H59.351 Postprocedural seroma of right eye and adnexa following an ophthalmic procedure
  • H59.352 Postprocedural seroma of left eye and adnexa following an ophthalmic procedure
  • H59.353 Postprocedural seroma of eye and adnexa following an ophthalmic procedure, bilateral
  • H59.359 Postprocedural seroma of unspecified eye and adnexa following an ophthalmic procedure
  • H59.361 Postprocedural seroma of right eye and adnexa following other procedure
  • H59.362 Postprocedural seroma of left eye and adnexa following other procedure
  • H59.363 Postprocedural seroma of eye and adnexa following other procedure, bilateral
  • H59.369 Postprocedural seroma of unspecified eye and adnexa following other procedure
  • H59.811 Chorioretinal scars after surgery for detachment, right eye
  • H59.812 Chorioretinal scars after surgery for detachment, left eye
  • H59.813 Chorioretinal scars after surgery for detachment, bilateral
  • H59.819 Chorioretinal scars after surgery for detachment, unspecified eye
  • H59.88 Other intraoperative complications of eye and adnexa, not elsewhere classified
  • H59.89 Other postprocedural complications and disorders of eye and adnexa, not elsewhere classified
H95 Intraoperative and postprocedural complications and disorders of ear and mastoid process, not elsewhere classified16 codes
  • H95.21 Intraoperative hemorrhage and hematoma of ear and mastoid process complicating a procedure on the ear and mastoid process
  • H95.22 Intraoperative hemorrhage and hematoma of ear and mastoid process complicating other procedure
  • H95.31 Accidental puncture and laceration of the ear and mastoid process during a procedure on the ear and mastoid process
  • H95.32 Accidental puncture and laceration of the ear and mastoid process during other procedure
  • H95.41 Postprocedural hemorrhage of ear and mastoid process following a procedure on the ear and mastoid process
  • H95.42 Postprocedural hemorrhage of ear and mastoid process following other procedure
  • H95.51 Postprocedural hematoma of ear and mastoid process following a procedure on the ear and mastoid process
  • H95.52 Postprocedural hematoma of ear and mastoid process following other procedure
  • H95.53 Postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process
  • H95.54 Postprocedural seroma of ear and mastoid process following other procedure
  • H95.811 Postprocedural stenosis of right external ear canal
  • H95.812 Postprocedural stenosis of left external ear canal
  • H95.813 Postprocedural stenosis of external ear canal, bilateral
  • H95.819 Postprocedural stenosis of unspecified external ear canal
  • H95.88 Other intraoperative complications and disorders of the ear and mastoid process, not elsewhere classified
  • H95.89 Other postprocedural complications and disorders of the ear and mastoid process, not elsewhere classified
I97 Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified19 codes
  • I97.3 Postprocedural hypertension
  • I97.410 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a cardiac catheterization
  • I97.411 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a cardiac bypass
  • I97.418 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating other circulatory system procedure
  • I97.42 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating other procedure
  • I97.51 Accidental puncture and laceration of a circulatory system organ or structure during a circulatory system procedure
  • I97.52 Accidental puncture and laceration of a circulatory system organ or structure during other procedure
  • I97.610 Postprocedural hemorrhage of a circulatory system organ or structure following a cardiac catheterization
  • I97.611 Postprocedural hemorrhage of a circulatory system organ or structure following cardiac bypass
  • I97.618 Postprocedural hemorrhage of a circulatory system organ or structure following other circulatory system procedure
  • I97.620 Postprocedural hemorrhage of a circulatory system organ or structure following other procedure
  • I97.621 Postprocedural hematoma of a circulatory system organ or structure following other procedure
  • I97.622 Postprocedural seroma of a circulatory system organ or structure following other procedure
  • I97.630 Postprocedural hematoma of a circulatory system organ or structure following a cardiac catheterization
  • I97.631 Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass
  • I97.638 Postprocedural hematoma of a circulatory system organ or structure following other circulatory system procedure
  • I97.640 Postprocedural seroma of a circulatory system organ or structure following a cardiac catheterization
  • I97.641 Postprocedural seroma of a circulatory system organ or structure following cardiac bypass
  • I97.648 Postprocedural seroma of a circulatory system organ or structure following other circulatory system procedure
J95 Intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified10 codes
  • J95.61 Intraoperative hemorrhage and hematoma of a respiratory system organ or structure complicating a respiratory system procedure
  • J95.62 Intraoperative hemorrhage and hematoma of a respiratory system organ or structure complicating other procedure
  • J95.71 Accidental puncture and laceration of a respiratory system organ or structure during a respiratory system procedure
  • J95.72 Accidental puncture and laceration of a respiratory system organ or structure during other procedure
  • J95.830 Postprocedural hemorrhage of a respiratory system organ or structure following a respiratory system procedure
  • J95.831 Postprocedural hemorrhage of a respiratory system organ or structure following other procedure
  • J95.860 Postprocedural hematoma of a respiratory system organ or structure following a respiratory system procedure
  • J95.861 Postprocedural hematoma of a respiratory system organ or structure following other procedure
  • J95.862 Postprocedural seroma of a respiratory system organ or structure following a respiratory system procedure
  • J95.863 Postprocedural seroma of a respiratory system organ or structure following other procedure
K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified10 codes
  • K91.61 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure
  • K91.62 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure
  • K91.71 Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure
  • K91.72 Accidental puncture and laceration of a digestive system organ or structure during other procedure
  • K91.840 Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure
  • K91.841 Postprocedural hemorrhage of a digestive system organ or structure following other procedure
  • K91.870 Postprocedural hematoma of a digestive system organ or structure following a digestive system procedure
  • K91.871 Postprocedural hematoma of a digestive system organ or structure following other procedure
  • K91.872 Postprocedural seroma of a digestive system organ or structure following a digestive system procedure
  • K91.873 Postprocedural seroma of a digestive system organ or structure following other procedure
L76 Intraoperative and postprocedural complications of skin and subcutaneous tissue12 codes
  • L76.01 Intraoperative hemorrhage and hematoma of skin and subcutaneous tissue complicating a dermatologic procedure
  • L76.02 Intraoperative hemorrhage and hematoma of skin and subcutaneous tissue complicating other procedure
  • L76.11 Accidental puncture and laceration of skin and subcutaneous tissue during a dermatologic procedure
  • L76.12 Accidental puncture and laceration of skin and subcutaneous tissue during other procedure
  • L76.21 Postprocedural hemorrhage of skin and subcutaneous tissue following a dermatologic procedure
  • L76.22 Postprocedural hemorrhage of skin and subcutaneous tissue following other procedure
  • L76.31 Postprocedural hematoma of skin and subcutaneous tissue following a dermatologic procedure
  • L76.32 Postprocedural hematoma of skin and subcutaneous tissue following other procedure
  • L76.33 Postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure
  • L76.34 Postprocedural seroma of skin and subcutaneous tissue following other procedure
  • L76.81 Other intraoperative complications of skin and subcutaneous tissue
  • L76.82 Other postprocedural complications of skin and subcutaneous tissue
M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified11 codes
  • M96.810 Intraoperative hemorrhage and hematoma of a musculoskeletal structure complicating a musculoskeletal system procedure
  • M96.811 Intraoperative hemorrhage and hematoma of a musculoskeletal structure complicating other procedure
  • M96.820 Accidental puncture and laceration of a musculoskeletal structure during a musculoskeletal system procedure
  • M96.821 Accidental puncture and laceration of a musculoskeletal structure during other procedure
  • M96.830 Postprocedural hemorrhage of a musculoskeletal structure following a musculoskeletal system procedure
  • M96.831 Postprocedural hemorrhage of a musculoskeletal structure following other procedure
  • M96.840 Postprocedural hematoma of a musculoskeletal structure following a musculoskeletal system procedure
  • M96.841 Postprocedural hematoma of a musculoskeletal structure following other procedure
  • M96.842 Postprocedural seroma of a musculoskeletal structure following a musculoskeletal system procedure
  • M96.843 Postprocedural seroma of a musculoskeletal structure following other procedure
  • M96.89 Other intraoperative and postprocedural complications and disorders of the musculoskeletal system
N98 Complications associated with artificial fertilization5 codes
  • N98.1 Hyperstimulation of ovaries
  • N98.2 Complications of attempted introduction of fertilized ovum following in vitro fertilization
  • N98.3 Complications of attempted introduction of embryo in embryo transfer
  • N98.8 Other complications associated with artificial fertilization
  • N98.9 Complication associated with artificial fertilization, unspecified
N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified10 codes
  • N99.61 Intraoperative hemorrhage and hematoma of a genitourinary system organ or structure complicating a genitourinary system procedure
  • N99.62 Intraoperative hemorrhage and hematoma of a genitourinary system organ or structure complicating other procedure
  • N99.71 Accidental puncture and laceration of a genitourinary system organ or structure during a genitourinary system procedure
  • N99.72 Accidental puncture and laceration of a genitourinary system organ or structure during other procedure
  • N99.820 Postprocedural hemorrhage of a genitourinary system organ or structure following a genitourinary system procedure
  • N99.821 Postprocedural hemorrhage of a genitourinary system organ or structure following other procedure
  • N99.840 Postprocedural hematoma of a genitourinary system organ or structure following a genitourinary system procedure
  • N99.841 Postprocedural hematoma of a genitourinary system organ or structure following other procedure
  • N99.842 Postprocedural seroma of a genitourinary system organ or structure following a genitourinary system procedure
  • N99.843 Postprocedural seroma of a genitourinary system organ or structure following other procedure
T81 Complications of procedures, not elsewhere classified69 codes
  • T81.10XA Postprocedural shock unspecified, initial encounter
  • T81.11XA Postprocedural cardiogenic shock, initial encounter
  • T81.12XA Postprocedural septic shock, initial encounter
  • T81.19XA Other postprocedural shock, initial encounter
  • T81.30XA Disruption of wound, unspecified, initial encounter
  • T81.31XA Disruption of external operation (surgical) wound, not elsewhere classified, initial encounter
  • T81.320A Disruption or dehiscence of gastrointestinal tract anastomosis, repair, or closure, initial encounter
  • T81.321A Disruption or dehiscence of closure of internal operation (surgical) wound of abdominal wall muscle or fascia, initial encounter
  • T81.328A Disruption or dehiscence of closure of other specified internal operation (surgical) wound, initial encounter
  • T81.329A Deep disruption or dehiscence of operation wound, unspecified, initial encounter
  • T81.33XA Disruption of traumatic injury wound repair, initial encounter
  • T81.500A Unspecified complication of foreign body accidentally left in body following surgical operation, initial encounter
  • T81.501A Unspecified complication of foreign body accidentally left in body following infusion or transfusion, initial encounter
  • T81.502A Unspecified complication of foreign body accidentally left in body following kidney dialysis, initial encounter
  • T81.503A Unspecified complication of foreign body accidentally left in body following injection or immunization, initial encounter
  • T81.504A Unspecified complication of foreign body accidentally left in body following endoscopic examination, initial encounter
  • T81.505A Unspecified complication of foreign body accidentally left in body following heart catheterization, initial encounter
  • T81.506A Unspecified complication of foreign body accidentally left in body following aspiration, puncture or other catheterization, initial encounter
  • T81.507A Unspecified complication of foreign body accidentally left in body following removal of catheter or packing, initial encounter
  • T81.508A Unspecified complication of foreign body accidentally left in body following other procedure, initial encounter
  • T81.509A Unspecified complication of foreign body accidentally left in body following unspecified procedure, initial encounter
  • T81.510A Adhesions due to foreign body accidentally left in body following surgical operation, initial encounter
  • T81.511A Adhesions due to foreign body accidentally left in body following infusion or transfusion, initial encounter
  • T81.512A Adhesions due to foreign body accidentally left in body following kidney dialysis, initial encounter
  • T81.513A Adhesions due to foreign body accidentally left in body following injection or immunization, initial encounter
  • T81.514A Adhesions due to foreign body accidentally left in body following endoscopic examination, initial encounter
  • T81.515A Adhesions due to foreign body accidentally left in body following heart catheterization, initial encounter
  • T81.516A Adhesions due to foreign body accidentally left in body following aspiration, puncture or other catheterization, initial encounter
  • T81.517A Adhesions due to foreign body accidentally left in body following removal of catheter or packing, initial encounter
  • T81.518A Adhesions due to foreign body accidentally left in body following other procedure, initial encounter
  • T81.519A Adhesions due to foreign body accidentally left in body following unspecified procedure, initial encounter
  • T81.520A Obstruction due to foreign body accidentally left in body following surgical operation, initial encounter
  • T81.521A Obstruction due to foreign body accidentally left in body following infusion or transfusion, initial encounter
  • T81.522A Obstruction due to foreign body accidentally left in body following kidney dialysis, initial encounter
  • T81.523A Obstruction due to foreign body accidentally left in body following injection or immunization, initial encounter
  • T81.524A Obstruction due to foreign body accidentally left in body following endoscopic examination, initial encounter
  • T81.525A Obstruction due to foreign body accidentally left in body following heart catheterization, initial encounter
  • T81.526A Obstruction due to foreign body accidentally left in body following aspiration, puncture or other catheterization, initial encounter
  • T81.527A Obstruction due to foreign body accidentally left in body following removal of catheter or packing, initial encounter
  • T81.528A Obstruction due to foreign body accidentally left in body following other procedure, initial encounter
  • T81.529A Obstruction due to foreign body accidentally left in body following unspecified procedure, initial encounter
  • T81.530A Perforation due to foreign body accidentally left in body following surgical operation, initial encounter
  • T81.531A Perforation due to foreign body accidentally left in body following infusion or transfusion, initial encounter
  • T81.532A Perforation due to foreign body accidentally left in body following kidney dialysis, initial encounter
  • T81.533A Perforation due to foreign body accidentally left in body following injection or immunization, initial encounter
  • T81.534A Perforation due to foreign body accidentally left in body following endoscopic examination, initial encounter
  • T81.535A Perforation due to foreign body accidentally left in body following heart catheterization, initial encounter
  • T81.536A Perforation due to foreign body accidentally left in body following aspiration, puncture or other catheterization, initial encounter
  • T81.537A Perforation due to foreign body accidentally left in body following removal of catheter or packing, initial encounter
  • T81.538A Perforation due to foreign body accidentally left in body following other procedure, initial encounter
  • T81.539A Perforation due to foreign body accidentally left in body following unspecified procedure, initial encounter
  • T81.590A Other complications of foreign body accidentally left in body following surgical operation, initial encounter
  • T81.591A Other complications of foreign body accidentally left in body following infusion or transfusion, initial encounter
  • T81.592A Other complications of foreign body accidentally left in body following kidney dialysis, initial encounter
  • T81.593A Other complications of foreign body accidentally left in body following injection or immunization, initial encounter
  • T81.594A Other complications of foreign body accidentally left in body following endoscopic examination, initial encounter
  • T81.595A Other complications of foreign body accidentally left in body following heart catheterization, initial encounter
  • T81.596A Other complications of foreign body accidentally left in body following aspiration, puncture or other catheterization, initial encounter
  • T81.597A Other complications of foreign body accidentally left in body following removal of catheter or packing, initial encounter
  • T81.598A Other complications of foreign body accidentally left in body following other procedure, initial encounter
  • T81.599A Other complications of foreign body accidentally left in body following unspecified procedure, initial encounter
  • T81.60XA Unspecified acute reaction to foreign substance accidentally left during a procedure, initial encounter
  • T81.61XA Aseptic peritonitis due to foreign substance accidentally left during a procedure, initial encounter
  • T81.69XA Other acute reaction to foreign substance accidentally left during a procedure, initial encounter
  • T81.81XA Complication of inhalation therapy, initial encounter
  • T81.82XA Emphysema (subcutaneous) resulting from a procedure, initial encounter
  • T81.83XA Persistent postprocedural fistula, initial encounter
  • T81.89XA Other complications of procedures, not elsewhere classified, initial encounter
  • T81.9XXA Unspecified complication of procedure, initial encounter
T85 Complications of other internal prosthetic devices, implants and grafts44 codes
  • T85.310A Breakdown (mechanical) of prosthetic orbit of right eye, initial encounter
  • T85.311A Breakdown (mechanical) of prosthetic orbit of left eye, initial encounter
  • T85.320A Displacement of prosthetic orbit of right eye, initial encounter
  • T85.321A Displacement of prosthetic orbit of left eye, initial encounter
  • T85.390A Other mechanical complication of prosthetic orbit of right eye, initial encounter
  • T85.391A Other mechanical complication of prosthetic orbit of left eye, initial encounter
  • T85.510A Breakdown (mechanical) of bile duct prosthesis, initial encounter
  • T85.511A Breakdown (mechanical) of esophageal anti-reflux device, initial encounter
  • T85.518A Breakdown (mechanical) of other gastrointestinal prosthetic devices, implants and grafts, initial encounter
  • T85.520A Displacement of bile duct prosthesis, initial encounter
  • T85.521A Displacement of esophageal anti-reflux device, initial encounter
  • T85.528A Displacement of other gastrointestinal prosthetic devices, implants and grafts, initial encounter
  • T85.590A Other mechanical complication of bile duct prosthesis, initial encounter
  • T85.591A Other mechanical complication of esophageal anti-reflux device, initial encounter
  • T85.598A Other mechanical complication of other gastrointestinal prosthetic devices, implants and grafts, initial encounter
  • T85.611A Breakdown (mechanical) of intraperitoneal dialysis catheter, initial encounter
  • T85.612A Breakdown (mechanical) of permanent sutures, initial encounter
  • T85.613A Breakdown (mechanical) of artificial skin graft and decellularized allodermis, initial encounter
  • T85.614A Breakdown (mechanical) of insulin pump, initial encounter
  • T85.618A Breakdown (mechanical) of other specified internal prosthetic devices, implants and grafts, initial encounter
  • T85.621A Displacement of intraperitoneal dialysis catheter, initial encounter
  • T85.622A Displacement of permanent sutures, initial encounter
  • T85.623A Displacement of artificial skin graft and decellularized allodermis, initial encounter
  • T85.624A Displacement of insulin pump, initial encounter
  • T85.628A Displacement of other specified internal prosthetic devices, implants and grafts, initial encounter
  • T85.631A Leakage of intraperitoneal dialysis catheter, initial encounter
  • T85.633A Leakage of insulin pump, initial encounter
  • T85.638A Leakage of other specified internal prosthetic devices, implants and grafts, initial encounter
  • T85.691A Other mechanical complication of intraperitoneal dialysis catheter, initial encounter
  • T85.692A Other mechanical complication of permanent sutures, initial encounter
  • T85.693A Other mechanical complication of artificial skin graft and decellularized allodermis, initial encounter
  • T85.694A Other mechanical complication of insulin pump, initial encounter
  • T85.698A Other mechanical complication of other specified internal prosthetic devices, implants and grafts, initial encounter
  • T85.71XA Infection and inflammatory reaction due to peritoneal dialysis catheter, initial encounter
  • T85.72XA Infection and inflammatory reaction due to insulin pump, initial encounter
  • T85.79XA Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.818A Embolism due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.828A Fibrosis due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.838A Hemorrhage due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.848A Pain due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.858A Stenosis due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.868A Thrombosis due to other internal prosthetic devices, implants and grafts, initial encounter
  • T85.898A Other specified complication of other internal prosthetic devices, implants and grafts, initial encounter
  • T85.9XXA Unspecified complication of internal prosthetic device, implant and graft, initial encounter
T86 Complications of transplanted organs and tissue33 codes
  • T86.5 Complications of stem cell transplant
  • T86.820 Skin graft (allograft) rejection
  • T86.821 Skin graft (allograft) (autograft) failure
  • T86.822 Skin graft (allograft) (autograft) infection
  • T86.828 Other complications of skin graft (allograft) (autograft)
  • T86.829 Unspecified complication of skin graft (allograft) (autograft)
  • T86.830 Bone graft rejection
  • T86.831 Bone graft failure
  • T86.832 Bone graft infection
  • T86.838 Other complications of bone graft
  • T86.839 Unspecified complication of bone graft
  • T86.8421 Corneal transplant infection, right eye
  • T86.8422 Corneal transplant infection, left eye
  • T86.8423 Corneal transplant infection, bilateral
  • T86.8429 Corneal transplant infection, unspecified eye
  • T86.8481 Other complications of corneal transplant, right eye
  • T86.8482 Other complications of corneal transplant, left eye
  • T86.8483 Other complications of corneal transplant, bilateral
  • T86.8489 Other complications of corneal transplant, unspecified eye
  • T86.8491 Unspecified complication of corneal transplant, right eye
  • T86.8492 Unspecified complication of corneal transplant, left eye
  • T86.8493 Unspecified complication of corneal transplant, bilateral
  • T86.8499 Unspecified complication of corneal transplant, unspecified eye
  • T86.850 Intestine transplant rejection
  • T86.851 Intestine transplant failure
  • T86.852 Intestine transplant infection
  • T86.858 Other complications of intestine transplant
  • T86.859 Unspecified complication of intestine transplant
  • T86.90 Unspecified complication of unspecified transplanted organ and tissue
  • T86.91 Unspecified transplanted organ and tissue rejection
  • T86.92 Unspecified transplanted organ and tissue failure
  • T86.93 Unspecified transplanted organ and tissue infection
  • T86.99 Other complications of unspecified transplanted organ and tissue
T88 Other complications of surgical and medical care, not elsewhere classified4 codes
  • T88.4XXA Failed or difficult intubation, initial encounter
  • T88.7XXA Unspecified adverse effect of drug or medicament, initial encounter
  • T88.8XXA Other specified complications of surgical and medical care, not elsewhere classified, initial encounter
  • T88.9XXA Complication of surgical and medical care, unspecified, initial encounter
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 921 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 921?

MS-DRG 921 (Complications of Treatment without CC/MCC) is a medical DRG in MDC 21 (Injuries, Poisonings & Toxic Effects of Drugs). Its FY 2026 relative weight is 0.6884 with a geometric mean length of stay of 2.1 days.

What is the difference between DRG 919, 920, 921?

All 3 share the same base category; the severity of secondary diagnoses separates them: 919 (with MCC), 920 (with CC), 921 (without CC/MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.

How many diagnosis codes group to DRG 921?

336 ICD-10-CM principal diagnosis codes group to this DRG, spanning 19 three-character categories.

What is the relative weight of DRG 921?

The FY 2026 relative weight of this DRG is 0.6884, meaning reimbursement of roughly 0.69 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

← PreviousDRG 920 – Complications of Treatment with CC
Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.