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 81 Other benign mammary dysplasias of right breast
 * N60.82 Other benign mammary dysplasias of left breast
 * N60.89 Other benign mammary dysplasias of unspecified breast
 * N60.9 Unspecified benign mammary dysplasia
 * N60.91 Unspecified benign mammary dysplasia of right breast
 * N60.92 Unspecified benign mammary dysplasia of left breast
 * N60.99 Unspecified benign mammary dysplasia of unspecified breast

N61 Inflammatory disorders of breast

 * Includes: abscess (acute) (chronic) (nonpuerperal) of areola
 * abscess (acute) (chronic) (nonpuerperal) of breast
 * carbuncle of breast
 * infective mastitis (acute) (subacute) (nonpuerperal)
 * mastitis (acute) (subacute) (nonpuerperal) NOS
 * Excludes1: inflammatory carcinoma of breast (C50.9)
 * inflammatory disorder of breast associated with childbirth (O91.-)
 * neonatal infective mastitis (P39.0)
 * thrombophlebitis of breast [Mondor's disease] (I80.8)

N62 Hypertrophy of breast

 * Includes: gynecomastia
 * hypertrophy of breast NOS
 * massive pubertal hypertrophy of breast
 * Excludes1: breast engorgement of newborn (P83.4)
 * disproportion of reconstructed breast (N65.1)

N63 Unspecified lump in breast

 * Includes: nodule(s) NOS in breast

N64 Other disorders of breast

 * Excludes2: mechanical complication of breast prosthesis and implant (T85.4-)
 * N64.0 Fissure and fistula of nipple
 * N64.1 Fat necrosis of breast
 * Fat necrosis (segmental) of breast
 * Code first breast necrosis due to breast graft (T85.89)
 * N64.2 Atrophy of breast
 * N64.3 Galactorrhea not associated with childbirth
 * N64.4 Mastodynia
 * N64.5 Other signs and symptoms in breast
 * Excludes2: abnormal findings on diagnostic imaging of breast (R92.-)
 * N64.51 Induration of breast
 * N64.52 Nipple discharge
 * Excludes1: abnormal findings in nipple discharge (R89.-)
 * N64.