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ICD-10-CM 2027

ICD-10 code for granulomatous mastitis

N61.2

Granulomatous mastitis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Mastitis (acute) (diffuse) (nonpuerperal) (subacute) › granulomatous”. Page updated September 29, 2026.

About coding granulomatous mastitis

The ICD-10-CM code for granulomatous mastitis is N61.2 (Granulomatous mastitis).

Within N61 (inflammatory disorders of breast), N61.2 is specifically for granulomatous mastitis. Related codes cover mastitis without abscess (N61.0) and abscess of the breast and nipple (N61.1).

To report this condition, pick the subcode that matches the documentation: N61.20 (unspecified breast), N61.21 (right breast), N61.22 (left breast) and N61.23 (bilateral breast).

It was added in FY2021, effective October 1, 2020.

Common questions about granulomatous mastitis ICD-10 codes

What is the ICD-10 code for granulomatous mastitis?

N61.2 — Granulomatous mastitis (a header code; report a more specific subcode).

Is N61.2 billable?

No. N61.2 is a header code. Report one of its more specific subcodes instead.