Inflammatory disorders of breast (N61)
The ICD-10 code section N61 covers various inflammatory disorders of the breast, including conditions like mastitis without abscess, breast abscesses, and granulomatous mastitis. These codes help specify different types of breast inflammation based on presence of abscess and breast location.
The ICD-10 code for mastitis without abscess (N61.0) is used for breast infections such as nonpuerperal mastitis, also known by names like actinobacillary mastitis, breast infection, or inflammatory disorder of the breast. For cases involving a pus-filled abscess, N61.1 (Abscess of the breast and nipple) captures chronic or postpartum abscesses, and includes synonyms like subareolar abscess and obstetric breast abscess. Granulomatous mastitis, a rare inflammatory breast condition, has distinct codes N61.20 through N61.23 to indicate laterality; from unspecified to bilateral involvement. These distinctions assist medical coders and healthcare providers in selecting precise codes that reflect the specific inflammatory breast condition, ensuring accurate documentation and communication relevant to breast health problems.
Diseases of the genitourinary system (N00–N99)
Disorders of breast (N60-N65)
N61 Inflammatory disorders of breast
- N61.0 Mastitis without abscess
- N61.1 Abscess of the breast and nipple
N61.2 Granulomatous mastitis
- N61.20 Granulomatous mastitis, unspecified breast
- N61.21 Granulomatous mastitis, right breast
- N61.22 Granulomatous mastitis, left breast
- N61.23 Granulomatous mastitis, bilateral breast
Inflammatory disorders of breast (N61)
Instructional Notations
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- inflammatory carcinoma of breast C50.9
- inflammatory disorder of breast associated with childbirth O91
- neonatal infective mastitis P39.0
- thrombophlebitis of breast [Mondor's disease] I80.8
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Granulomatous Mastitis
A rare, benign, inflammatory breast disease occurring in premenopausal women shortly after a recent pregnancy. The origin is unknown but it is commonly mistaken for malignancy and sometimes associated with BREAST FEEDING and the use of ORAL CONTRACEPTIVES.
