ICD-10-CM 2027
ICD-10 code for mammary gland suppuration
From the official ICD-10-CM alphabetic index entry “Suppuration, suppurative › mammary gland”. Page updated September 29, 2026.
About coding mammary gland suppuration
The ICD-10-CM code for mammary gland suppuration is N61.1 (Abscess of the breast and nipple). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N61.1.
Within N61 (inflammatory disorders of breast), N61.1 is specifically for abscess of the breast and nipple. Related codes cover mastitis without abscess (N61.0) 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 mammary gland suppuration codes (official index)
Common questions about mammary gland suppuration ICD-10 codes
What is the ICD-10 code for mammary gland suppuration?
- N61.1 — Abscess of the breast and nipple. More specific codes apply when the documentation supports them: O91.12, O91.13.
Is N61.1 billable?
- Yes. N61.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N61.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N61.1 as a principal diagnosis.
Is N61.1 a CC or MCC?
- No. N61.1 is neither a CC nor an MCC under MS-DRG v44.0.