O29.3X9
BillableToxic reaction to local anesthesia during pregnancy, unspecified trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O29.3X9 an HCC code?
No. O29.3X9 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
O29.3X9 is the ICD-10-CM diagnosis code for toxic reaction to local anesthesia during pregnancy, unspecified trimester. A poisoning or harmful reaction to local anesthesia during pregnancy when the specific trimester is not documented or known. O29.3X9 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).
O29.3X9 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 trimester information is unavailable despite documentation review.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O29.3X9 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 trimester information is unavailable despite documentation review
- •Attempt to clarify trimester timing through provider query when possible