N61.2 Granulomatous mastitis

The ICD-10-CM code for Granulomatous mastitis is N61.2 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

14: Diseases of the genitourinary system (N00-N99)

Section

N60-N65: Disorders of breast (N60-N65)

Category N61

8 codes (6 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to N61.2:

• Mastitis (acute) (diffuse) (nonpuerperal) (subacute) › granulomatous

Official Coding Guidelines

CKD staging and code assignment (N18.-)

The ICD-10-CM classifies CKD based on severity. The severity of CKD is designated by stages 1-5. Stage 2, code N18.2, equates to mild CKD; stage 3, codes N18.30-N18.32, equate to moderate CKD; and stage 4, code N18.4, equates to severe CKD. Code N18.6, End stage renal disease (ESRD), is assigned when the provider has documented end- stage renal disease (ESRD).

CKD stage plus ESRD: assign N18.6 only

If both a stage of CKD and ESRD are documented, assign code N18.6 only.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool