O24.113 vs O99
O24.113 (Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester) compared with O99 (Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), 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. O24.113 carries an Excludes2 note covering O99: “maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| O24.113Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester | O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester is a billable ICD-10-CM diagnosis code (O24.113). | Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium is a non-billable ICD-10-CM category code (O99). |
| Includes | — | conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care |
| Use additional code | code (for): from category E11 to further identify any manifestations injectable non-insulin antidiabetic drugs (Z79.85) | 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