NPI Atlas

N61 – Inflammatory disorders of breast

ICD-10-CM 2027 diagnosis code · Disorders of breast

Non-billable header

ICD-10-CM code N61

Code: N61 (claims format: N61)
Description: Inflammatory disorders of breast
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: N60-N65 Disorders of breast

Billable codes under N61

N61 is a header code and cannot be used on claims. Choose the most specific code:

N61.0 – Mastitis without abscessBillable
N61.1 – Abscess of the breast and nippleBillable
N61.2 – Granulomatous mastitisHeader (more codes below)

Notes for N61

Excludes1 (not coded here):

inflammatory carcinoma of breast (C50.A-)
inflammatory disorder of breast associated with childbirth (O91.-)
neonatal infective mastitis (P39.0)
thrombophlebitis of breast [Mondor's disease] (I80.8)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block N60-N65

Excludes1 (not coded here):

disorders of breast associated with childbirth (O91-O92)

Frequently asked questions

What is ICD-10 code N61?

N61 is the ICD-10-CM code for inflammatory disorders of breast, in the block N60-N65 (Disorders of breast).

Is N61 a billable code?

No. N61 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.