2027 ICD-10-CM Diagnosis Code N61.1Abscess of the breast and nipple
ICD-10-CM Codes›N00–N99›N60-N65›N61
- Billable — Valid for Submission
- Not Chronic
N61.1 is a billable ICD-10-CM diagnosis code for abscess of the breast and nipple. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 600 through 601. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nonmalignant breast conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abscess of breast
- Abscess of breast, associated with childbirth
- Abscess of chest wall
- Abscess of nipple
- Abscess of skin of breast
- Acute abscess of areola
- Acute abscess of breast
- Acute mastitis
- Carbuncle of breast
- Carbuncle of chest wall
- Carbuncle of pectoral region
- Cellulitis and abscess of breast
- Cellulitis and abscess of trunk
- Cellulitis of breast
- Cellulitis of pectoral region
- Chronic abscess of areola
- Chronic abscess of breast
- Chronic disease of breast
- Chronic non-puerperal breast abscess
- Chronic subareolar non-puerperal abscess
- Furuncle of breast
- Furuncle of chest wall
- Furuncle of pectoral region
- Intramammary breast abscess
- Lump of subareolar area of breast
- Mammary fistula
- Nonpuerperal abscess of areola
- Nonpuerperal abscess of breast
- Nonpuerperal abscess of left areola
- Nonpuerperal abscess of left breast
- Nonpuerperal abscess of right areola
- Nonpuerperal abscess of right breast
- Obstetric abscess of breast
- Obstetric abscess of nipple
- Retromammary abscess associated with childbirth
- Retromammary breast abscess
- Streptococcal mastitis
- Subareolar abscess associated with childbirth
- Subareolar breast abscess
- Submammary abscess associated with childbirth
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N61.1: its own notes plus those printed at N61, block N60-N65, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Abscess (acute) (chronic) (nonpuerperal) of areola
- Abscess (acute) (chronic) (nonpuerperal) of breast
- Carbuncle of breast
- Mastitis with abscess
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N61.1, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
Suppuration, suppurative See Also: condition;
breast N61.1
mammary gland N61.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Breast Diseases
Breast diseases include various conditions and changes in your breast. Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges of fluids that are not breast milk.
The full article covers:
- What are breast diseases?
- What are the symptoms of breast disease?
- How are breast diseases diagnosed?
- What are the treatments for breast disease?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N61.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replacement N61.1 replaces the following previously assigned code(s):
- N61 - Inflammatory disorders of breast
Questions About N61.1Overview
What is the ICD-10 code for abscess of the breast and nipple?
The ICD-10-CM code for abscess of the breast and nipple is N61.1 (sometimes written as N611). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N61.1 (Inflammatory disorders of breast) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report abscess of the breast and nipple on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N61.1 group to?
When abscess of the breast and nipple is the principal diagnosis on an inpatient stay, it groups to MS-DRG 600, 601, with relative weights from 0.6014 to 0.9971 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N61.1 be reported with a code from C50.A?
Not as a rule. The Excludes1 note at N61, which applies to N61.1, lists "inflammatory carcinoma of breast (C50.A-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of N61.1?
Under the General Equivalence Mappings, abscess of the breast and nipple converts to ICD-9-CM 611.0 (inflam disease of breast). The mapping is approximate, so confirm the match fits the documentation.
