ICD-10-CM
ICD-10 code for Mastitis: N61.0
The ICD-10-CM index points "Mastitis" to N61.0, Mastitis without abscess. N61.0 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in N61
A header groups codes and is not billed. A billable code is one you can report.
- N61Inflammatory disorders of breastHeader
- N61.0Mastitis without abscessBillable
- N61.1Abscess of the breast and nippleBillable
- N61.2Granulomatous mastitisHeader
- N61.20Granulomatous mastitis, unspecified breastBillable
- N61.21Granulomatous mastitis, right breastBillable
- N61.22Granulomatous mastitis, left breastBillable
- N61.23Granulomatous mastitis, bilateral breastBillable
Excludes1
Excludes1 means these codes are not reported together.
From N61. A note on a category applies to every code under it.
Related conditions
Related pages
- N61.0 code detailsNotes, nearby codes, CMS-HCC group
- Category N61Every code under it
- Chapter 14Diseases of the genitourinary system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Mastitis?
The ICD-10-CM index points "Mastitis" to N61.0, Mastitis without abscess. N61.0 is a billable code.
Is N61.0 billable?
Yes. N61.0 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to N61.0?
The CDC tabular list gives 4 Excludes1 notes (not coded together) for N61.0 and the categories above it. They are listed on this page.
What chapter is N61.0 in?
Chapter 14. Diseases of the genitourinary system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.