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  3. Ch. N00-N99
  4. Sec. N60-N65
  5. Category N64
Category N64

Other disorders of breast

Clinical Classification Guidelines

Specific Diagnosis Codes

Fissure and fistula of nipple
N64.0
Fat necrosis of breast
N64.1
Atrophy of breast
N64.2
Galactorrhea not associated with childbirth
N64.3
Mastodynia
N64.4
Other signs and symptoms in breast
N64.5
Induration of breast
N64.51
Nipple discharge
N64.52
Retraction of nipple
N64.53
Other signs and symptoms in breast
N64.59
Other specified disorders of breast
N64.8
Ptosis of breast
N64.81
Hypoplasia of breast
N64.82
Other specified disorders of breast
N64.89
Disorder of breast, unspecified
N64.9
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Data updated for October 2025 release.

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