ICD-10-CM · FY 2026 APRIL UPDATE
N64
Other disorders of breast
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| N64.0 | Fissure and fistula of nipple | Billable |
| N64.1 | Fat necrosis of breast | Billable |
| N64.2 | Atrophy of breast | Billable |
| N64.3 | Galactorrhea not associated with childbirth | Billable |
| N64.4 | Mastodynia | Billable |
| N64.5 | Other signs and symptoms in breast | Category |
| N64.51 | Induration of breast | Billable |
| N64.52 | Nipple discharge | Billable |
| N64.53 | Retraction of nipple | Billable |
| N64.59 | Other signs and symptoms in breast | Billable |
| N64.8 | Other specified disorders of breast | Category |
| N64.81 | Ptosis of breast | Billable |
| N64.82 | Hypoplasia of breast | Billable |
| N64.89 | Other specified disorders of breast | Billable |
| N64.9 | Disorder of breast, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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