2026 ICD-10-CM Diagnosis Code T86.890Other transplanted tissue rejection

ICD-10-CM Codes›S00–T88›T80-T88›T86

ICD-10-CM T86.890
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T86.890 is a billable ICD-10-CM diagnosis code for other transplanted tissue rejection. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 438 through 440. 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
T86.890
Billable Status
Yes — Valid for Submission
Code Describes
Other transplanted tissue rejection
Short Description
Other transplanted tissue rejection
Same as the full description in the CMS dataset.
Parent Code
T86.89
Complications of other transplanted tissue

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 CodeT86.890Other transplanted tissue rejection

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accelerated rejection of pancreas transplant
  • Acute rejection of pancreas transplant
  • Chronic arterial allograft rejection
  • Chronic graft rejection
  • Chronic rejection of pancreas transplant
  • Complication of transplanted pancreas
  • Hyperacute rejection of pancreas transplant
  • Rejection of pancreas transplant

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)
      • transplant
        • pancreas
          • rejection
    • Complication(s) (from) (of)
      • transplant
        • specified
          • tissue
            • rejection
    • Rejection
      • transplant
        • pancreas
    • Rejection
      • transplant
        • specified NEC

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

Organ Transplantation

You may need an organ transplant if one of your organs has failed. This can happen because of illness or injury. When you have an organ transplant, doctors remove an organ from another person and place it in your body. The organ may come from a living donor or a donor who has died.

Read the full article at MedlinePlus

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

Convert T86.890 to ICD-9-CMHistory

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

ICD-9-CM
996.86 Compl pancreas transplnt
Approximate The match is approximate rather than exact.
ICD-9-CM
996.89 Comp oth organ transplnt
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 T86.890Overview

Is T86.890 (Complications of other transplanted tissue) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other transplanted tissue rejection on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does T86.890 group to?

When other transplanted tissue rejection is the principal diagnosis on an inpatient stay, it groups to MS-DRG 438, 439, 440, with relative weights from 0.6214 to 1.6302 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T86.890?

Under the General Equivalence Mappings, other transplanted tissue rejection converts to ICD-9-CM 996.86 (compl pancreas transplnt) and 996.89 (comp oth organ transplnt). 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.