O99.321

O99.321

Billable

Drug use complicating pregnancy, first trimester

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Drug use during the first three months of pregnancy (first trimester) that causes complications for the mother or fetus.

Coding Tips

•Confirm the trimester is documented in the medical record before assigning this code
•Specify the type of drug (illicit, prescription misuse, or other) when available for better clinical clarity

Code Hierarchy

└O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium └O99.3Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium └O99.32Drug use complicating pregnancy, childbirth, and the puerperium └O99.321Drug use complicating pregnancy, first trimester

└O99.321Drug use complicating pregnancy, first trimester