Chronic Kidney Disease, Severe (Stage 4)
Under the CMS-HCC V28 risk adjustment model (PY2026 Medicare Advantage), HCC 327 carries a community non-dual aged RAF of 0.514, and 1 payable ICD-10-CM diagnosis codes map to it. In the V28 hierarchy it is superseded by HCC 326 when a more severe category in the same disease group is also present.
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.
V28 hierarchy
Trumped by: HCC 326 (a more severe category in the same disease group supersedes this one).
Supersedes: HCC 328, HCC 329 (this category is counted instead of these when they co-occur).
ICD-10-CM codes that map to HCC 327 (1)
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.
Frequently asked questions
What is CMS-HCC V28 category 327?
HCC 327 is "Chronic Kidney Disease, Severe (Stage 4)", a payment Hierarchical Condition Category in the CMS-HCC V28 risk adjustment model (100% phase-in for payment year 2026). 1 payable ICD-10-CM codes map to it.
What is the RAF weight for HCC 327?
The community non-dual aged relative factor for CMS-HCC V28 category 327 is 0.514. 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 327?
1 payable ICD-10-CM diagnosis codes map to CMS-HCC V28 category 327 (Chronic Kidney Disease, Severe (Stage 4)) for payment year 2026.
Which categories trump HCC 327 in the V28 hierarchy?
HCC 327 is superseded by HCC 326 (Chronic Kidney Disease, Stage 5). When a more severe category in the same disease group is documented, it is counted instead of HCC 327.
Source: CMS published ICD-10-CM mapping file plus CMS-HCC v28 PY2026 model software.