MS-DRG 479 – Biopsies of Musculoskeletal System and Connective Tissue without CC/MCC
A Surgical DRG in MDC 08 (Diseases & Disorders of the Musculoskeletal System & Connective Tissue). Inpatient cases group to DRG 479 when one of the 431 ICD-10-PCS operating-room procedures listed below is reported. Its FY 2026 relative weight is 1.8589 with a geometric mean length of stay of 3.3 days.
Surgical DRG – assigned by operating-room procedure✓ Official CMS v43.0 dataset
The grouper first assigns the case to MDC 08 from the principal diagnosis, then matches a qualifying operating-room procedure from the ICD-10-PCS list below (this is a Surgical DRG), then applies the severity split from secondary diagnoses: with MCC → 477; with CC → 478; without CC/MCC → 479.
ICD-10-PCS
Procedure Codes 431 codes · 148 categories
431 of 431 shown
0MJX Bursae and Ligaments, Inspection2 codes
0MJX0ZZInspection of Upper Bursa and Ligament, Open Approach
0MJX4ZZInspection of Upper Bursa and Ligament, Percutaneous Endoscopic Approach
0MJY Bursae and Ligaments, Inspection2 codes
0MJY0ZZInspection of Lower Bursa and Ligament, Open Approach
0MJY4ZZInspection of Lower Bursa and Ligament, Percutaneous Endoscopic Approach
0N90 Head and Facial Bones, Drainage3 codes
0N900ZXDrainage of Skull, Open Approach, Diagnostic
0N903ZXDrainage of Skull, Percutaneous Approach, Diagnostic
0N904ZXDrainage of Skull, Percutaneous Endoscopic Approach, Diagnostic
0N91 Head and Facial Bones, Drainage3 codes
0N910ZXDrainage of Frontal Bone, Open Approach, Diagnostic
0N913ZXDrainage of Frontal Bone, Percutaneous Approach, Diagnostic
0N914ZXDrainage of Frontal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N93 Head and Facial Bones, Drainage3 codes
0N930ZXDrainage of Right Parietal Bone, Open Approach, Diagnostic
0N933ZXDrainage of Right Parietal Bone, Percutaneous Approach, Diagnostic
0N934ZXDrainage of Right Parietal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N94 Head and Facial Bones, Drainage3 codes
0N940ZXDrainage of Left Parietal Bone, Open Approach, Diagnostic
0N943ZXDrainage of Left Parietal Bone, Percutaneous Approach, Diagnostic
0N944ZXDrainage of Left Parietal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N95 Head and Facial Bones, Drainage3 codes
0N950ZXDrainage of Right Temporal Bone, Open Approach, Diagnostic
0N953ZXDrainage of Right Temporal Bone, Percutaneous Approach, Diagnostic
0N954ZXDrainage of Right Temporal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N96 Head and Facial Bones, Drainage3 codes
0N960ZXDrainage of Left Temporal Bone, Open Approach, Diagnostic
0N963ZXDrainage of Left Temporal Bone, Percutaneous Approach, Diagnostic
0N964ZXDrainage of Left Temporal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N97 Head and Facial Bones, Drainage3 codes
0N970ZXDrainage of Occipital Bone, Open Approach, Diagnostic
0N973ZXDrainage of Occipital Bone, Percutaneous Approach, Diagnostic
0N974ZXDrainage of Occipital Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9C Head and Facial Bones, Drainage3 codes
0N9C0ZXDrainage of Sphenoid Bone, Open Approach, Diagnostic
0N9C3ZXDrainage of Sphenoid Bone, Percutaneous Approach, Diagnostic
0N9C4ZXDrainage of Sphenoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9F Head and Facial Bones, Drainage3 codes
0N9F0ZXDrainage of Right Ethmoid Bone, Open Approach, Diagnostic
0N9F3ZXDrainage of Right Ethmoid Bone, Percutaneous Approach, Diagnostic
0N9F4ZXDrainage of Right Ethmoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9G Head and Facial Bones, Drainage3 codes
0N9G0ZXDrainage of Left Ethmoid Bone, Open Approach, Diagnostic
0N9G3ZXDrainage of Left Ethmoid Bone, Percutaneous Approach, Diagnostic
0N9G4ZXDrainage of Left Ethmoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9H Head and Facial Bones, Drainage3 codes
0N9H0ZXDrainage of Right Lacrimal Bone, Open Approach, Diagnostic
0N9H3ZXDrainage of Right Lacrimal Bone, Percutaneous Approach, Diagnostic
0N9H4ZXDrainage of Right Lacrimal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9J Head and Facial Bones, Drainage3 codes
0N9J0ZXDrainage of Left Lacrimal Bone, Open Approach, Diagnostic
0N9J3ZXDrainage of Left Lacrimal Bone, Percutaneous Approach, Diagnostic
0N9J4ZXDrainage of Left Lacrimal Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9K Head and Facial Bones, Drainage3 codes
0N9K0ZXDrainage of Right Palatine Bone, Open Approach, Diagnostic
0N9K3ZXDrainage of Right Palatine Bone, Percutaneous Approach, Diagnostic
0N9K4ZXDrainage of Right Palatine Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9L Head and Facial Bones, Drainage3 codes
0N9L0ZXDrainage of Left Palatine Bone, Open Approach, Diagnostic
0N9L3ZXDrainage of Left Palatine Bone, Percutaneous Approach, Diagnostic
0N9L4ZXDrainage of Left Palatine Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9M Head and Facial Bones, Drainage3 codes
0N9M0ZXDrainage of Right Zygomatic Bone, Open Approach, Diagnostic
0N9M3ZXDrainage of Right Zygomatic Bone, Percutaneous Approach, Diagnostic
0N9M4ZXDrainage of Right Zygomatic Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9N Head and Facial Bones, Drainage3 codes
0N9N0ZXDrainage of Left Zygomatic Bone, Open Approach, Diagnostic
0N9N3ZXDrainage of Left Zygomatic Bone, Percutaneous Approach, Diagnostic
0N9N4ZXDrainage of Left Zygomatic Bone, Percutaneous Endoscopic Approach, Diagnostic
0N9R Head and Facial Bones, Drainage3 codes
0N9R0ZXDrainage of Maxilla, Open Approach, Diagnostic
0N9R3ZXDrainage of Maxilla, Percutaneous Approach, Diagnostic
0N9R4ZXDrainage of Maxilla, Percutaneous Endoscopic Approach, Diagnostic
0N9T Head and Facial Bones, Drainage3 codes
0N9T0ZXDrainage of Right Mandible, Open Approach, Diagnostic
0N9T3ZXDrainage of Right Mandible, Percutaneous Approach, Diagnostic
0N9T4ZXDrainage of Right Mandible, Percutaneous Endoscopic Approach, Diagnostic
0N9V Head and Facial Bones, Drainage3 codes
0N9V0ZXDrainage of Left Mandible, Open Approach, Diagnostic
0N9V3ZXDrainage of Left Mandible, Percutaneous Approach, Diagnostic
0N9V4ZXDrainage of Left Mandible, Percutaneous Endoscopic Approach, Diagnostic
0N9X Head and Facial Bones, Drainage3 codes
0N9X0ZXDrainage of Hyoid Bone, Open Approach, Diagnostic
0N9X3ZXDrainage of Hyoid Bone, Percutaneous Approach, Diagnostic
0N9X4ZXDrainage of Hyoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB0 Head and Facial Bones, Excision3 codes
0NB00ZXExcision of Skull, Open Approach, Diagnostic
0NB03ZXExcision of Skull, Percutaneous Approach, Diagnostic
0NB04ZXExcision of Skull, Percutaneous Endoscopic Approach, Diagnostic
0NB1 Head and Facial Bones, Excision3 codes
0NB10ZXExcision of Frontal Bone, Open Approach, Diagnostic
0NB13ZXExcision of Frontal Bone, Percutaneous Approach, Diagnostic
0NB14ZXExcision of Frontal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB3 Head and Facial Bones, Excision3 codes
0NB30ZXExcision of Right Parietal Bone, Open Approach, Diagnostic
0NB33ZXExcision of Right Parietal Bone, Percutaneous Approach, Diagnostic
0NB34ZXExcision of Right Parietal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB4 Head and Facial Bones, Excision3 codes
0NB40ZXExcision of Left Parietal Bone, Open Approach, Diagnostic
0NB43ZXExcision of Left Parietal Bone, Percutaneous Approach, Diagnostic
0NB44ZXExcision of Left Parietal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB5 Head and Facial Bones, Excision3 codes
0NB50ZXExcision of Right Temporal Bone, Open Approach, Diagnostic
0NB53ZXExcision of Right Temporal Bone, Percutaneous Approach, Diagnostic
0NB54ZXExcision of Right Temporal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB6 Head and Facial Bones, Excision3 codes
0NB60ZXExcision of Left Temporal Bone, Open Approach, Diagnostic
0NB63ZXExcision of Left Temporal Bone, Percutaneous Approach, Diagnostic
0NB64ZXExcision of Left Temporal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NB7 Head and Facial Bones, Excision3 codes
0NB70ZXExcision of Occipital Bone, Open Approach, Diagnostic
0NB73ZXExcision of Occipital Bone, Percutaneous Approach, Diagnostic
0NB74ZXExcision of Occipital Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBC Head and Facial Bones, Excision3 codes
0NBC0ZXExcision of Sphenoid Bone, Open Approach, Diagnostic
0NBC3ZXExcision of Sphenoid Bone, Percutaneous Approach, Diagnostic
0NBC4ZXExcision of Sphenoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBF Head and Facial Bones, Excision3 codes
0NBF0ZXExcision of Right Ethmoid Bone, Open Approach, Diagnostic
0NBF3ZXExcision of Right Ethmoid Bone, Percutaneous Approach, Diagnostic
0NBF4ZXExcision of Right Ethmoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBG Head and Facial Bones, Excision3 codes
0NBG0ZXExcision of Left Ethmoid Bone, Open Approach, Diagnostic
0NBG3ZXExcision of Left Ethmoid Bone, Percutaneous Approach, Diagnostic
0NBG4ZXExcision of Left Ethmoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBH Head and Facial Bones, Excision3 codes
0NBH0ZXExcision of Right Lacrimal Bone, Open Approach, Diagnostic
0NBH3ZXExcision of Right Lacrimal Bone, Percutaneous Approach, Diagnostic
0NBH4ZXExcision of Right Lacrimal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBJ Head and Facial Bones, Excision3 codes
0NBJ0ZXExcision of Left Lacrimal Bone, Open Approach, Diagnostic
0NBJ3ZXExcision of Left Lacrimal Bone, Percutaneous Approach, Diagnostic
0NBJ4ZXExcision of Left Lacrimal Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBK Head and Facial Bones, Excision3 codes
0NBK0ZXExcision of Right Palatine Bone, Open Approach, Diagnostic
0NBK3ZXExcision of Right Palatine Bone, Percutaneous Approach, Diagnostic
0NBK4ZXExcision of Right Palatine Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBL Head and Facial Bones, Excision3 codes
0NBL0ZXExcision of Left Palatine Bone, Open Approach, Diagnostic
0NBL3ZXExcision of Left Palatine Bone, Percutaneous Approach, Diagnostic
0NBL4ZXExcision of Left Palatine Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBM Head and Facial Bones, Excision3 codes
0NBM0ZXExcision of Right Zygomatic Bone, Open Approach, Diagnostic
0NBM3ZXExcision of Right Zygomatic Bone, Percutaneous Approach, Diagnostic
0NBM4ZXExcision of Right Zygomatic Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBN Head and Facial Bones, Excision3 codes
0NBN0ZXExcision of Left Zygomatic Bone, Open Approach, Diagnostic
0NBN3ZXExcision of Left Zygomatic Bone, Percutaneous Approach, Diagnostic
0NBN4ZXExcision of Left Zygomatic Bone, Percutaneous Endoscopic Approach, Diagnostic
0NBX Head and Facial Bones, Excision3 codes
0NBX0ZXExcision of Hyoid Bone, Open Approach, Diagnostic
0NBX3ZXExcision of Hyoid Bone, Percutaneous Approach, Diagnostic
0NBX4ZXExcision of Hyoid Bone, Percutaneous Endoscopic Approach, Diagnostic
0QJY4ZZInspection of Lower Bone, Percutaneous Endoscopic Approach
0R9C Upper Joints, Drainage3 codes
0R9C0ZXDrainage of Right Temporomandibular Joint, Open Approach, Diagnostic
0R9C3ZXDrainage of Right Temporomandibular Joint, Percutaneous Approach, Diagnostic
0R9C4ZXDrainage of Right Temporomandibular Joint, Percutaneous Endoscopic Approach, Diagnostic
0R9D Upper Joints, Drainage3 codes
0R9D0ZXDrainage of Left Temporomandibular Joint, Open Approach, Diagnostic
0R9D3ZXDrainage of Left Temporomandibular Joint, Percutaneous Approach, Diagnostic
0R9D4ZXDrainage of Left Temporomandibular Joint, Percutaneous Endoscopic Approach, Diagnostic
0RBC Upper Joints, Excision3 codes
0RBC0ZXExcision of Right Temporomandibular Joint, Open Approach, Diagnostic
0RBC3ZXExcision of Right Temporomandibular Joint, Percutaneous Approach, Diagnostic
0RBC4ZXExcision of Right Temporomandibular Joint, Percutaneous Endoscopic Approach, Diagnostic
0RBD Upper Joints, Excision3 codes
0RBD0ZXExcision of Left Temporomandibular Joint, Open Approach, Diagnostic
0RBD3ZXExcision of Left Temporomandibular Joint, Percutaneous Approach, Diagnostic
0RBD4ZXExcision of Left Temporomandibular Joint, Percutaneous Endoscopic Approach, Diagnostic
0RJC Upper Joints, Inspection2 codes
0RJC0ZZInspection of Right Temporomandibular Joint, Open Approach
0RJC4ZZInspection of Right Temporomandibular Joint, Percutaneous Endoscopic Approach
0RJD Upper Joints, Inspection2 codes
0RJD0ZZInspection of Left Temporomandibular Joint, Open Approach
0RJD4ZZInspection of Left Temporomandibular Joint, Percutaneous Endoscopic Approach
0SJ2 Lower Joints, Inspection1 code
0SJ24ZZInspection of Lumbar Vertebral Disc, Percutaneous Endoscopic Approach
0SJ4 Lower Joints, Inspection1 code
0SJ44ZZInspection of Lumbosacral Disc, Percutaneous Endoscopic Approach
ICD-10-CM
Qualifying Diagnosis Codes
Diagnosis codes do not drive assignment for this DRG. Cases group here from the ICD-10-PCS procedure list below.
Frequently Asked Questions
What is MS-DRG 479?
MS-DRG 479 (Biopsies of Musculoskeletal System and Connective Tissue without CC/MCC) is a surgical DRG in MDC 08 (Diseases & Disorders of the Musculoskeletal System & Connective Tissue). Its FY 2026 relative weight is 1.8589 with a geometric mean length of stay of 3.3 days.
What is the difference between DRG 477, 478, 479?
All 3 share the same base category; the severity of secondary diagnoses separates them: 477 (with MCC), 478 (with CC), 479 (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 procedure codes group to DRG 479?
431 ICD-10-PCS operating-room procedure codes group to this DRG.
What is the relative weight of DRG 479?
The FY 2026 relative weight of this DRG is 1.8589, meaning reimbursement of roughly 1.86 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
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.