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N61.21

N61.21: Granulomatous mastitis, right breast

Billable / specific codeICD-10-CMright

N61.21 is a billable, specific ICD-10-CM code for granulomatous mastitis, right breast. It is valid for submission on a claim.

Check N61.21 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above N61.21

A category’s note binds every code beneath it.

Written on N61: Inflammatory disorders of breast

  • inflammatory carcinoma of breast (C50.A-)
  • inflammatory disorder of breast associated with childbirth (O91.-)
  • neonatal infective mastitis (P39.0)
  • thrombophlebitis of breast [Mondor's disease] (I80.8)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

N61.21 is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56448Billing and Coding: Breast Imaging Mammography/Breast Echography (Sonography)/Breast MRI/Ductography

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under N61.2

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.