I13 vs O16
I13 (Hypertensive heart and chronic kidney disease) compared with O16 (Unspecified maternal hypertension), 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. I13 carries an Excludes2 note covering O16: “hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I13Hypertensive heart and chronic kidney disease | O16Unspecified maternal hypertension | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Hypertensive heart and chronic kidney disease is a non-billable ICD-10-CM category code (I13). | Unspecified maternal hypertension is a non-billable ICD-10-CM category code (O16). |
| Includes | any condition in I11.- with any condition in I12.- cardiorenal disease cardiovascular renal disease | — |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources