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ICD-10-CM 2027 diagnosis code

T81Complications of procedures, not elsewhere classified

Not billable — use a more specific code

T81 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T81

T81 is the ICD-10-CM diagnosis code for complications of procedures, not elsewhere classified. It belongs to block T80-T88 (complications of surgical and medical care, not elsewhere classified) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T81.1 (shock), T81.3 (classified), T81.4 (procedure), T81.5 (procedure), T81.6 (procedure), T81.7 (classified), T81.8 (classified) and T81.9 (procedure).

The conditions in its Excludes2 note aren't part of T81, but may be coded alongside it if the patient has both: complications following immunization (T88.0-T88.1), complications following infusion, transfusion and therapeutic injection (T80.-), complications of transplanted organs and tissue (T86.-), complication of prosthetic devices, implants and grafts (T82-T85) and 7 more.

Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under T81

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • complications following immunization (T88.0-T88.1)
  • complications following infusion, transfusion and therapeutic injection (T80.-)
  • complications of transplanted organs and tissue (T86.-)
  • specified complications classified elsewhere, such as:
  • complication of prosthetic devices, implants and grafts (T82-T85)
  • dermatitis due to drugs and medicaments (L23.3, L24.4, L25.1, L27.0-L27.1)
  • endosseous dental implant failure (M27.6-)
  • floppy iris syndrome (IFIS) (intraoperative) H21.81
  • intraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-)
  • ostomy complications (J95.0-, K94.-, N99.5-)
  • plateau iris syndrome (post-iridectomy) (postprocedural) H21.82
  • poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4)
Use additional codeAdd a secondary code to fully describe the condition
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Notes that apply from higher levels

Instructions written at a parent level also apply to T81.

Broader instructions also apply from T80-T88 Complications of surgical and medical care, not elsewhere classified and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference T81

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T81

Is T81 billable?

No. T81 is a header code. Report one of its more specific subcodes instead.