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ICD-10-CM 2027 diagnosis code

T86.820Skin graft (allograft) rejection

✓ Billable / specificCC — complication/comorbidity

T86.820 is a valid, billable ICD-10-CM code for skin graft (allograft) rejection. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 T86.820

T86.820 is the ICD-10-CM diagnosis code for skin graft (allograft) rejection. It belongs to category T86 (complications of transplanted organs and tissue), 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within T86.82 (complications of skin graft (allograft) (autograft)), T86.820 is specifically for skin graft (allograft) rejection. Related codes cover skin graft (allograft) (autograft) failure (T86.821), skin graft (allograft) (autograft) infection (T86.822), other complications of skin graft (allograft) (autograft) (T86.828) and unspecified complication of skin graft (allograft) (autograft) (T86.829).

Use an additional code to identify other transplant complications, such as: graft-versus-host disease (D89.81-), malignancy associated with organ transplant (C80.2) and post-transplant lymphoproliferative disorders (PTLD) (D47.Z1).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 919 (Complications of Treatment with MCC, relative weight 1.763), DRG 920 (Complications of Treatment with CC, relative weight 0.9975) and DRG 921 (Complications of Treatment without CC/MCC, relative weight 0.6722), in MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 996.52 (mechanical complication due to graft of other tissue, not elsewhere classified).

Notes that apply from higher levels

Instructions written at a parent level also apply to T86.820.

› From T86.82 Complications of skin graft (allograft) (autograft)
Excludes2
  • complication of artificial skin graft (T85.693)
› From T86 Complications of transplanted organs and tissue
Use additional code
  • code to identify other transplant complications, such as:
  • graft-versus-host disease (D89.81-)
  • malignancy associated with organ transplant (C80.2)
  • post-transplant lymphoproliferative disorders (PTLD) (D47.Z1)

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.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to T86.820.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 996.52Mechanical complication due to graft of other tissue, not elsewhere classifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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 T86.820

Is T86.820 billable?

Yes. T86.820 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can T86.820 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict T86.820 as a principal diagnosis.

Is T86.820 a CC or MCC?

T86.820 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does T86.820 group to?

T86.820 is used in the MS-DRG v44.0 logic for MS-DRG 919 (Complications of Treatment with MCC), MS-DRG 920 (Complications of Treatment with CC) and MS-DRG 921 (Complications of Treatment without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for T86.820?

The CMS General Equivalence Mappings map T86.820 to ICD-9-CM 996.52.