Summary
UnitedHealthcare's Medicare Advantage Vitamin D Testing medical policy, in the November 2026 bulletin effective 2026-11-01, removed ICD-10 diagnosis codes C88.4, Z79.60, Z79.61, Z79.620 through Z79.624, Z79.630 through Z79.634, Z79.64, and Z79.69 from the applicable codes list, and updated the CMS related documents list and clinical evidence references. Billing teams should stop relying on the removed diagnosis codes when submitting Vitamin D testing claims for Medicare Advantage members and confirm that remaining claims carry a supported diagnosis.
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What to do
Action · 3 steps
01Already effective 2026-11-01: Billing team should update diagnosis code edits and charge entry for Vitamin D testing ordered for UnitedHealthcare Medicare Advantage members so the removed ICD-10 codes (C88.4, Z79.60-Z79.69 series as listed) are no longer selected as supporting diagnoses.
02Providers and front desk staff should be told which diagnoses are no longer accepted on Vitamin D test orders, and any test scheduled under a removed code should be re-reviewed for a currently listed diagnosis before the claim is submitted.
03Claims that still carry removed codes will be denied, so billing should verify charge-entry claim edits before the next submission cycle.
Codes mentioned
C88.4Z79.60Z79.61Z79.620Z79.621Z79.622Z79.623Z79.624Z79.630Z79.631Z79.632Z79.633Z79.634Z79.64Z79.69
Original notice
Vitamin D Testing
uhcprovider.com · Always check the source before changing claims.