O34.2 vs Z98.891
O34.2 (Maternal care due to uterine scar from previous surgery) compared with Z98.891 (History of uterine scar from previous surgery), 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. Z98.891 carries an Excludes1 note covering O34.2: “Maternal care due to uterine scar from previous surgery (O34.2-)”
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
| O34.2Maternal care due to uterine scar from previous surgery | Z98.891History of uterine scar from previous surgery | |
|---|---|---|
| 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 | Maternal care due to uterine scar from previous surgery is a non-billable ICD-10-CM category code (O34.2). | History of uterine scar from previous surgery is a billable ICD-10-CM diagnosis code (Z98.891). |
| Includes | the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor | — |
| Use additional code | code for specific condition | — |
| Code first | any associated obstructed labor (O65.5) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources