ICD-10-CM 2027
ICD-10 code for areola inflammation
From the official ICD-10-CM alphabetic index entry “Inflammation, inflamed, inflammatory (with exudation) › areola”. Page updated September 29, 2026.
About coding areola inflammation
The ICD-10-CM code for areola inflammation is N61.0 (Mastitis without abscess).
Within N61, choose N61.0 (Mastitis without abscess) only when documentation doesn't support a more specific option: abscess of the breast and nipple (N61.1) and granulomatous mastitis (N61.2).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 600 (Non-Malignant Breast Disorders with CC/MCC, relative weight 0.9975) and DRG 601 (Non-Malignant Breast Disorders without CC/MCC, relative weight 0.6017), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific areola inflammation codes (official index)
- puerperal, postpartum or gestational
Common questions about areola inflammation ICD-10 codes
What is the ICD-10 code for areola inflammation?
- N61.0 — Mastitis without abscess.
Is N61.0 billable?
- Yes. N61.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N61.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N61.0 as a principal diagnosis.
Is N61.0 a CC or MCC?
- No. N61.0 is neither a CC nor an MCC under MS-DRG v44.0.