Stem Cell, Including Bone Marrow, Transplant Status/Complications
Under the CMS-HCC V28 risk adjustment model (PY2026 Medicare Advantage), HCC 454 carries a community non-dual aged RAF of 1.068, and 14 payable ICD-10-CM diagnosis codes map to it.
Medically reviewed by Jess P., CPC · Reviewed: May 30, 2026
RAF factors
The community factor varies by Medicaid and originally-disabled status; the institutional factor applies to long-term-institutional members. These are the CMS-HCC V28 PY2026 relative factors.
Combine this factor with demographics and other HCCs in the RAF score calculator to model the full CMS-HCC V28 RAF for a member.
ICD-10-CM codes that map to HCC 454 (14)
Payable diagnosis codes that map to this category under CMS-HCC V28 PY2026. Open any code for its full description, HCC mapping, and coding guidance.
- D89.810Acute graft-versus-host disease
- D89.811Chronic graft-versus-host disease
- D89.812Acute on chronic graft-versus-host disease
- D89.813Graft-versus-host disease, unspecified
- M31.11Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
- T86.00Unspecified complication of bone marrow transplant
- T86.01Bone marrow transplant rejection
- T86.02Bone marrow transplant failure
- T86.03Bone marrow transplant infection
- T86.09Other complications of bone marrow transplant
- T86.5Complications of stem cell transplant
- Z48.290Encounter for aftercare following bone marrow transplant
- Z94.81Bone marrow transplant status
- Z94.84Stem cells transplant status
Coder workflow notes
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Frequently asked questions
What is CMS-HCC V28 category 454?
HCC 454 is "Stem Cell, Including Bone Marrow, Transplant Status/Complications", a payment Hierarchical Condition Category in the CMS-HCC V28 risk adjustment model (100% phase-in for payment year 2026). 14 payable ICD-10-CM codes map to it.
What is the RAF weight for HCC 454?
The community non-dual aged relative factor for CMS-HCC V28 category 454 is 1.068. The exact factor varies by enrollment segment (community Medicaid and originally-disabled status, and institutional); the full segment table is published in the CMS V28 Rate Announcement.
How many ICD-10-CM codes map to HCC 454?
14 payable ICD-10-CM diagnosis codes map to CMS-HCC V28 category 454 (Stem Cell, Including Bone Marrow, Transplant Status/Complications) for payment year 2026.
Related references
Sources
CMS published ICD-10-CM mapping file plus CMS-HCC v28 PY2026 model software. CMS-HCC V28 model published at CMS.gov Risk Adjustors; ICD-10-CM member codes from the CMS ICD-10-CM code set.
Verified current to CMS-HCC V28, payment year 2026 — last reviewed May 30, 2026.