O92 vs Z39.1
O92 (Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium) compared with Z39.1 (Encounter for care and examination of lactating mother), 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. Z39.1 carries an Excludes1 note covering O92: “disorders of lactation (O92.-)”
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
| O92Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium | Z39.1Encounter for care and examination of lactating mother | |
|---|---|---|
| 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 | Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium is a non-billable ICD-10-CM category code (O92). | Encounter for care and examination of lactating mother is a billable ICD-10-CM diagnosis code (Z39.1). |
| Includes | — | Encounter for supervision of lactation |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources