O99.32 vs Z79
O99.32 (Drug use complicating pregnancy, childbirth, and the puerperium) compared with Z79 (Long term (current) drug therapy), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. Z79 carries an Excludes2 note covering O99.32: “drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| O99.32Drug use complicating pregnancy, childbirth, and the puerperium | Z79Long term (current) drug therapy | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Drug use complicating pregnancy, childbirth, and the puerperium is a non-billable ICD-10-CM category code (O99.32). | Long term (current) drug therapy is a non-billable ICD-10-CM category code (Z79). |
| Includes | conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care | long term (current) drug use for prophylactic purposes |
| Use additional code | code(s) from F11-F16 and F18-F19 to identify manifestations of the drug use code to identify specific condition | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources