HCC 277: Cystic Fibrosis ICD-10-CM
CMS-HCC Category 277 (Cystic Fibrosis) is a payment HCC in the V28 Medicare Advantage risk adjustment model. For payment year 2026 it adds a risk adjustment factor between 0.650 and 3.829 to a beneficiary's RAF score depending on the payment segment (0.998 for a community, non-dual, aged enrollee). 5 ICD-10-CM diagnosis codes map to HCC 277. A more severe related category (HCC 276) supersedes it when both are reported.
RAF Weight by Payment Segment 7 segments
| Payment Segment | Relative Factor |
|---|---|
| Community, non-dual, aged | 0.998 |
| Community, partial-benefit dual, aged | 0.650 |
| Community, full-benefit dual, aged | 1.340 |
| Community, non-dual, disabled | 2.818 |
| Community, partial-benefit dual, disabled | 3.829 |
| Community, full-benefit dual, disabled | 3.760 |
| Institutional | 0.873 |
A beneficiary is scored in exactly one segment, set by Medicaid (dual) status, aged or disabled entitlement, and residence. Factors are relative weights, not dollar amounts; new-enrollee segments score on demographics only. In the hierarchy, HCC 276 (Lung Transplant Status/Complications) supersedes HCC 277 when reported together. HCC 277 in turn supersedes HCC 278 (Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis), HCC 279 (Severe Persistent Asthma), and HCC 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders).
ICD-10-CM Codes That Map to HCC 277 5 codes
- E84.0 Cystic fibrosis with pulmonary manifestations from V24 HCC 110
- E84.11 Meconium ileus in cystic fibrosis from V24 HCC 110
- E84.19 Cystic fibrosis with other intestinal manifestations from V24 HCC 110
- E84.8 Cystic fibrosis with other manifestations from V24 HCC 110
- E84.9 Cystic fibrosis, unspecified from V24 HCC 110
Every code above carries the full HCC 277 weight when documented and reported on a Medicare Advantage encounter. The code link opens its full page with the complete risk adjustment card.
Questions About HCC 277
What is HCC 277 in the CMS-HCC model?
HCC 277 is CMS-HCC Category 277 (Cystic Fibrosis) in the V28 risk adjustment model. It covers 5 ICD-10-CM diagnosis codes that raise a Medicare Advantage beneficiary's risk score when documented.
What is the RAF weight for HCC 277?
For payment year 2026, HCC 277 adds 0.998 to the RAF score of a community, non-dual, aged beneficiary. The published weights range from 0.650 to 3.829 across the seven payment segments shown above.
Which categories supersede HCC 277?
HCC 276 (Lung Transplant Status/Complications) sits above HCC 277 in the hierarchy: when a beneficiary has diagnoses in both, only the more severe category is paid.
Related References
Source: Centers for Medicare & Medicaid Services, Payment Year 2026 risk adjustment mapping and model software releases (CMS-HCC V28), applied to the FY 2026 ICD-10-CM code set. ICD List is not affiliated with CMS.
