O03 vs Z33.2
O03 (Spontaneous abortion) compared with Z33.2 (Encounter for elective termination of pregnancy), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Z33.2 carries an Excludes1 note covering O03: “spontaneous abortion (O03)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| O03Spontaneous abortion | Z33.2Encounter for elective termination of pregnancy | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Spontaneous abortion is a non-billable ICD-10-CM category code (O03). | Encounter for elective termination of pregnancy is a billable ICD-10-CM diagnosis code (Z33.2). |
| Includes | miscarriage | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources