N61 vs P39.0
N61 (Inflammatory disorders of breast) compared with P39.0 (Neonatal infective mastitis), 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. N61 carries an Excludes1 note covering P39.0: “neonatal infective mastitis (P39.0)”
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
| N61Inflammatory disorders of breast | P39.0Neonatal infective mastitis | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) |
| Definition | Inflammatory disorders of breast is a non-billable ICD-10-CM category code (N61). | Neonatal infective mastitis is a billable ICD-10-CM diagnosis code (P39.0). |
| Use additional code | — | code to identify organism or specific infection |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources