H50.18
BillableAlternating exotropia with other noncomitancies
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is H50.18 an HCC code?
No. H50.18 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
H50.18 is the ICD-10-CM diagnosis code for alternating exotropia with other noncomitancies. Both eyes alternately turn outward with other specific directional patterns or characteristics beyond the standard A or V patterns. This is used for alternating exotropia with unusual or complex directional features. H50.18 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of ocular muscles, binocular movement, accommodation and refraction (h49-h52).
H50.18 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.
Use this code only when alternating exotropia is present with noncomitancies that don't fit A or V pattern categories.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H50.18 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when alternating exotropia is present with noncomitancies that don't fit A or V pattern categories
- •Document the specific nature of the noncomitancy to support medical necessity