H31.122
BillableDiffuse secondary atrophy of choroid, left eye
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is H31.122 an HCC code?
No. H31.122 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
H31.122 is the ICD-10-CM diagnosis code for diffuse secondary atrophy of choroid, left eye. Widespread thinning and wasting of the choroid layer in the left eye that has developed as a secondary consequence of another eye condition or disease. H31.122 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of choroid and retina (h30-h36).
H31.122 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Document the primary condition that led to the secondary choroidal atrophy for complete clinical picture.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H31.122 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the primary condition that led to the secondary choroidal atrophy for complete clinical picture
- •Verify left eye laterality is clearly stated in the medical record