T86.91 Unspecified transplanted organ and tissue rejection

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies 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)

MS-DRG index

Defines the logic of DRG(s) 919-921 in MDC 21.

Approximate ICD-9-CM (GEMs)

• 996.80 Complications of transplanted organ, unspecified (approximate)

Code annotations containing back-references to T86.91

Back-references to T86

• Code First: C80.2 Malignant neoplasm associated with transplanted organ ("complication of transplanted organ (T86.-)")
• Code First: D47.Z1 Post-transplant lymphoproliferative disorder (PTLD) ("complications of transplanted organs and tissue (T86.-)")
• Type 2 Excludes: D89 Other disorders involving the immune mechanism, not elsewhere classified ("transplant failure and rejection (T86.-)")
• Code First: D89.81 Graft-versus-host disease ("complications of transplanted organs and tissue (T86.-)")
• Code First: D89.83 Cytokine release syndrome ("complications of transplanted organs and tissue (T86.-)")
• Type 2 Excludes: T78 Adverse effects, not elsewhere classified ("complications of surgical and medical care NEC (T80-T88)")
• Type 2 Excludes: T79 Certain early complications of trauma, not elsewhere classified ("complications occurring during or following medical procedures (T80-T88)")
• Type 2 Excludes: T79 Certain early complications of trauma, not elsewhere classified ("complications of surgical and medical care NEC (T80-T88)")
• Type 2 Excludes: T81 Complications of procedures, not elsewhere classified ("complications of transplanted organs and tissue (T86.-)")
• Type 2 Excludes: T82 Complications of cardiac and vascular prosthetic devices, implants and grafts ("failure and rejection of transplanted organs and tissue (T86.-)")
• Type 2 Excludes: T83 Complications of genitourinary prosthetic devices, implants and grafts ("failure and rejection of transplanted organs and tissue (T86.-)")
• Type 2 Excludes: T84 Complications of internal orthopedic prosthetic devices, implants and grafts ("failure and rejection of transplanted organs and tissues (T86.-)")
• Type 2 Excludes: T85 Complications of other internal prosthetic devices, implants and grafts ("failure and rejection of transplanted organs and tissue (T86.-)")
• Type 1 Excludes: Z98.85 Transplanted organ removal status ("encounter for removal of transplanted organ -code to complication of transplanted organ (T86.-)")

Diagnosis Index entries for T86.91

• Complication (s) (from) (of) › transplant › rejection
• Disorder (of) › tubulo-interstitial (in) › transplant rejection
• Pyelonephritis › in (due to) › transplant rejection
• Rejection › transplant
• Rejection › transplant › organ (immune or nonimmune cause)

Nearby codes

• T86.892 Other transplanted tissue infection
• T86.898 Other complications of other transplanted tissue
• T86.899 Unspecified complication of other transplanted tissue
• T86.9 Complication of unspecified transplanted organ and tissue
• T86.90 Unspecified complication of unspecified transplanted organ and tissue
• T86.91 Unspecified transplanted organ and tissue rejection (this code)
• T86.92 Unspecified transplanted organ and tissue failure
• T86.93 Unspecified transplanted organ and tissue infection
• T86.99 Other complications of unspecified transplanted organ and tissue