T86.01 Bone marrow transplant 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)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 454 — Stem Cell, Including Bone Marrow, Transplant Status/Complications
• CMS-HCC V22: HCC 186 — Major Organ Transplant or Replacement Status
• RxHCC V08: HCC 395 — Stem Cell, Including Bone Marrow, Transplant Status/Complications
• ESRD V24: HCC 186

MS-DRG index

Defines the logic of DRG(s) 808-810 in MDC 16.

Approximate ICD-9-CM (GEMs)

• 996.85 Complications of transplanted bone marrow (approximate)

Code annotations containing back-references to T86.01

Back-references to T86.01

• Type 2 Excludes: T80 Complications following infusion, transfusion and therapeutic injection ("bone marrow transplant rejection (T86.01)")

Back-references to T86.0

• Code First: M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] ("complications of bone marrow transplant (T86.0-)")
• Type 2 Excludes: T80.82 Complication of immune effector cellular therapy ("complication of bone marrow transplant (T86.0)")

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 T86.01

• Complication (s) (from) (of) › transplant › bone marrow › rejection
• Rejection › transplant › bone › marrow

Nearby codes

• T86 Complications of transplanted organs and tissue
• T86.0 Complications of bone marrow transplant
• T86.00 Unspecified complication of bone marrow transplant
• T86.01 Bone marrow transplant rejection (this code)
• T86.02 Bone marrow transplant failure
• T86.03 Bone marrow transplant infection
• T86.09 Other complications of bone marrow transplant
• T86.1 Complications of kidney transplant
• T86.10 Unspecified complication of kidney transplant