ICD-10-CM 2027
ICD-10 code for breast abscess
From the official ICD-10-CM alphabetic index entry “Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › breast (acute) (chronic) (nonpuerperal)”. Page updated September 29, 2026.
About coding breast abscess
The ICD-10-CM code for breast abscess is N61.1 (Abscess of the breast and nipple). The official index lists 1 more specific code, 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 breast abscess codes (official index)
- newborn P39.0 — Neonatal infective mastitis
- puerperal, postpartum, gestational
Common questions about breast abscess ICD-10 codes
What is the ICD-10 code for breast abscess?
- N61.1 — Abscess of the breast and nipple. More specific codes apply when the documentation supports them: P39.0.
What is the ICD-10 code for newborn breast abscess?
- P39.0 — Neonatal infective mastitis.
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.