2026 ICD-10-CM Diagnosis Code T86.821Skin graft (allograft) (autograft) failure

ICD-10-CM Codes›S00–T88›T80-T88›T86

ICD-10-CM T86.821
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T86.821 is a billable ICD-10-CM diagnosis code for skin graft (allograft) (autograft) failure. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 919 through 921. Coders also document this condition as anastomotic failure of flap. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of transplanted organs or tissue, initial encounter.

Code Identity

ICD-10-CM Code
T86.821
Billable Status
Yes — Valid for Submission
Code Describes
Skin graft (allograft) (autograft) failure
Short Description
Skin graft (allograft) (autograft) failure
Same as the full description in the CMS dataset.
Parent Code
T86.82
Complications of skin graft (allograft) (autograft)

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT86Complications of transplanted organs and tissue
This CodeT86.821Skin graft (allograft) (autograft) failure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anastomotic failure of flap
  • Complete flap loss
  • Flap failure
  • Flap loss
  • Full thickness flap loss
  • Full thickness skin graft failure
  • Skin graft failure
  • Split skin graft failure

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of transplanted organs and tissue (T86). 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 2026, published by CMS and the National Center for Health Statistics.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • prosthetic device or implant
        • skin graft
          • failure
    • Complication(s) (from) (of)
      • skin
        • graft
          • failure
    • Complication(s) (from) (of)
      • transplant
        • skin
          • failure
    • Failure, failed
      • transplant
        • skin (allograft) (autograft)

Clinical ClassificationClinical

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

CCSR INJ036
Complication of transplanted organs or tissue, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T86.821 to ICD-9-CMHistory

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

ICD-9-CM
996.52 Oth tissue graft malfunc
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T86.821Overview

Is T86.821 (Complications of skin graft (allograft) (autograft)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report skin graft (allograft) (autograft) failure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does T86.821 group to?

When skin graft (allograft) (autograft) failure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 919, 920, 921, with relative weights from 0.6884 to 1.8308 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T86.821?

Under the General Equivalence Mappings, skin graft (allograft) (autograft) failure converts to ICD-9-CM 996.52 (oth tissue graft malfunc). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.