O29.3X1
BillableToxic reaction to local anesthesia during pregnancy, first trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O29.3X1 an HCC code?
No. O29.3X1 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
O29.3X1 is the ICD-10-CM diagnosis code for toxic reaction to local anesthesia during pregnancy, first trimester. A poisoning or harmful reaction to local anesthesia (numbing medication injected at a specific site) during the first three months of pregnancy. O29.3X1 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).
O29.3X1 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.
Distinguish between toxic reaction to local anesthesia and other anesthesia complications by reviewing the type of anesthetic agent used.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O29.3X1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Distinguish between toxic reaction to local anesthesia and other anesthesia complications by reviewing the type of anesthetic agent used
- •Document the specific symptoms of toxicity such as neurological or cardiovascular manifestations