2027 ICD-10-CM Diagnosis Code T88.8XXAOther specified complications of surgical and medical care, not elsewhere classified, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T88

ICD-10-CM T88.8XXA
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T88.8XXA is a billable ICD-10-CM diagnosis code for other specified complications of surgical and medical care, not elsewhere classified, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 919 through 921. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter.

Code Identity

ICD-10-CM Code
T88.8XXA
Billable Status
Yes — Valid for Submission
Code Describes
Other specified complications of surgical and medical care, not elsewhere classified, initial encounter
Short Description
Oth complications of surgical and medical care, NEC, init
Parent Code
T88.8
Other specified complications of surgical and medical care, not elsewhere classified

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT88Other complications of surgical and medical care, not elsewhere classified
This CodeT88.8XXAOther specified complications of surgical and medical care, not elsewhere classified, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accidental perforation during medical care
  • Accidental puncture during a procedure
  • Accidental puncture during medical care
  • Acute phototoxic reaction
  • Adverse cutaneous reaction to diagnostic procedure
  • Adverse effect from PUVA photochemotherapy
  • Anastomotic bleeding
  • Angry back syndrome
  • Application site blister
  • Application site burn
  • Application site edema
  • Application site erythema
  • Application site inflammation
  • Application site itching
  • Application site rash
  • Application site reaction
  • Bleeding during surgery requiring transfusion
  • Bone fixation device loosening
  • Breathing system problem
  • Cardiac complication
  • Complication due to imaging of patient with implanted medical device
  • Complication of diagnostic procedure
  • Complication of health care
  • Complication of patch testing
  • Extensive postoperative bruising
  • Fatigue due to treatment
  • Finding of stoma device
  • Hypermelanosis following phototherapy for neonatal jaundice
  • Iatrogenic angle-closure glaucoma
  • Iatrogenic corneal ectasia
  • Iatrogenic glaucoma
  • Iatrogenic infection caused by Clostridium botulinum
  • Iatrogenic ischemic cerebral infarction
  • Iatrogenic myxedema coma
  • Infection caused by Clostridium botulinum
  • Injury as a result of positioning
  • Intraoperative hemorrhage
  • Lipogranuloma
  • Loosening of external fixator pin
  • Loosening of musculoskeletal implant
  • Loosening of orthopedic device
  • Medical gas supply failure
  • Medication administered in error
  • Medication error
  • Mucositis following therapy
  • Myxedema coma
  • Observation of appearance of stoma
  • Paraffinoma of skin
  • Perioperative death
  • Perioperative hemorrhage
  • Peripheral vascular complications of care
  • Phototherapy skin rash
  • Porphyrin within reference range
  • Post intensive care syndrome
  • Post intensive care unit syndrome
  • Postoperative jaundice
  • Pseudoporphyria
  • Pseudoporphyria due to PUVA therapy
  • PUVA phototherapy burn
  • Serious reportable event associated with product or device
  • Skin disorder due to phototherapy
  • Stoma bag leaking
  • Stoma bulge
  • Stoma pancaking
  • Stoma seal leaking
  • Syringe labeling error
  • Therapy-related myelodysplastic syndrome
  • Transmission of infectious agent via medicinal product
  • Unsuccessful phlebotomy
  • Wrong dose of medication given
  • Wrong drug given

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Other complications of surgical and medical care, not elsewhere classified (T88). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to T88.8XXA: its own notes plus those printed at T88.8, T88, block T80-T88, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From T88 Other complications of surgical and medical care, not elsewhere classified applies to 39 codes
  • complication following infusion, transfusion and therapeutic injection (T80.-)
  • complication following procedure NEC (T81.-)
  • complications of anesthesia in labor and delivery (O74.-)
  • complications of anesthesia in pregnancy (O29.-)
  • complications of anesthesia in puerperium (O89.-)
  • complications of devices, implants and grafts (T82-T85)
  • complications of obstetric surgery and procedure (O75.4)
  • dermatitis due to drugs and medicaments (L23.3, L24.4, L25.1, L27.0-L27.1)
  • poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4)
  • specified complications classified elsewhere
From Block T80-T88 Complications of surgical and medical care, not elsewhere classified applies to 1,683 codes
  • any encounters with medical care for postprocedural conditions in which no complications are present, such as:
  • artificial opening status (Z93.-)
  • closure of external stoma (Z43.-)
  • fitting and adjustment of external prosthetic device (Z44.-)
  • burns and corrosions from local applications and irradiation (T20-T32)
  • complications of surgical procedures during pregnancy, childbirth and the puerperium (O00-O9A)
  • mechanical complication of respirator [ventilator] (J95.850)
  • poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4 or 6)
  • postprocedural fever (R50.82)
  • specified complications classified elsewhere, such as:
  • cerebrospinal fluid leak from spinal puncture (G97.0)
  • colostomy malfunction (K94.0-)
  • disorders of fluid and electrolyte imbalance (E86-E87)
  • functional disturbances following cardiac surgery (I97.0-I97.1)
  • intraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-)
  • ostomy complications (J95.0-, K94.-, N99.5-)
  • postgastric surgery syndromes (K91.1)
  • postlaminectomy syndrome NEC (M96.1)
  • postmastectomy lymphedema syndrome (I97.2)
  • postsurgical blind-loop syndrome (K91.2)
  • ventilator associated pneumonia (J95.851)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From T88.8 Other specified complications of surgical and medical care, not elsewhere classified applies to 3 codes
  • code to identify the complication
From Block T80-T88 Complications of surgical and medical care, not elsewhere classified applies to 1,683 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • code(s) to identify the specified condition resulting from the complication
  • code to identify devices involved and details of circumstances (Y62-Y82)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From T88 Other complications of surgical and medical care, not elsewhere classified applies to 39 codes
  • The appropriate 7th character is to be added to each code from category T88
Values for category T88 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter this code
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name T88.8XXA, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming T88.8XXA: they are not reported together with it, unless the two conditions are unrelated.

  • T88.7 Unspecified adverse effect of drug or medicament
    specified adverse effects of drugs and medicaments (A00-R94 and T80-T88.6, T88.8) names T88.8, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ037
Complication of other surgical or medical care, injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert T88.8XXA to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
999.9 Complic med care NEC/NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About T88.8XXAOverview

Is T88.8XXA a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified complications of surgical and medical care, not elsewhere classified, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in T88.8XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for other specified complications of surgical and medical care, not elsewhere classified, such as an emergency visit or first evaluation.

What MS-DRG does T88.8XXA group to?

When other specified complications of surgical and medical care, not elsewhere classified, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 920, 919, 921, with relative weights from 0.6719 to 1.7624 depending on complications. Higher weights mean higher Medicare reimbursement.

Does T88.8XXA need an additional code?

When the condition applies, yes. The Use Additional Code note at T88.8, which applies to T88.8XXA, reads: code to identify the complication. The additional code is reported after T88.8XXA.

What is the ICD-9 equivalent of T88.8XXA?

Under the General Equivalence Mappings, other specified complications of surgical and medical care, not elsewhere classified, initial encounter converts to ICD-9-CM 999.9 (complic med care NEC/NOS). The mapping is approximate, so confirm the match fits the documentation.