O23.40
BillableUnspecified infection of urinary tract in pregnancy, unspecified trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O23.40 an HCC code?
No. O23.40 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
O23.40 is the ICD-10-CM diagnosis code for unspecified infection of urinary tract in pregnancy, unspecified trimester. A urinary tract infection during pregnancy where the specific location within the urinary system and trimester are not documented. O23.40 sits in the ICD-10-CM chapter for pregnancy, childbirth and the puerperium (o00-o9a), within the section covering other maternal disorders predominantly related to pregnancy (o20-o29).
O23.40 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.
This is a non-specific code; use only when neither the site nor trimester can be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O23.40 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.