Q52.120
BillableLongitudinal vaginal septum, nonobstructing
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is Q52.120 an HCC code?
No. Q52.120 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
Q52.120 is the ICD-10-CM diagnosis code for longitudinal vaginal septum, nonobstructing. A birth defect where a wall of tissue runs lengthwise down the vagina, creating two separate compartments, but does not block normal function or menstrual flow. Q52.120 sits in the ICD-10-CM chapter for congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (q00-qa0), within the section covering congenital malformations of genital organs (q50-q56).
Q52.120 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.
Confirm the septum is non-obstructing; if it blocks menstrual flow or intercourse, use Q52.121 instead.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q52.120 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm the septum is non-obstructing; if it blocks menstrual flow or intercourse, use Q52.121 instead
- •Document whether the septum is complete or partial in the medical record