N64.89 Other specified disorders of breast

Billable ICD-10-CM code, FY2026.

Applicable to

• Galactocele
• Subinvolution of breast (postlactational)

Applies from N64 Other disorders of breast

Excludes2 (not included here)

• mechanical complication of breast prosthesis and implant (T85.4-)

MS-DRG index

Defines the logic of DRG(s) 600-601 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 611.5 Galactocele (approximate)
• 611.89 Other specified disorders of breast (approximate)

Diagnosis Index entries for N64.89

• Cyst (colloid) (mucous) (simple) (retention) › milk
• Deformity › breast (acquired)
• Deformity › nipple (congenital) › acquired
• Degeneration, degenerative › breast
• Degeneration, degenerative › nipple
• Disease, diseased › breast › specified NEC
• Disorder (of) › breast › specified type NEC
• Galactocele (breast)
• Hematoma (traumatic) (skin surface intact) › breast (nontraumatic)
• Infarct, infarction › breast
• Mastopathy, mastopathia › estrogenic, oestrogenica, oestrogenic
• Mastopathy, mastopathia › ovarian origin
• Occlusion, occluded › mammary duct
• Pendulous › breast
• Subinvolution › breast (postlactational) (postpuerperal)
• Unilateral › development, breast

Nearby codes

• N64.53 Retraction of nipple
• N64.59 Other signs and symptoms in breast
• N64.8 Other specified disorders of breast
• N64.81 Ptosis of breast
• N64.82 Hypoplasia of breast
• N64.89 Other specified disorders of breast (this code)
• N64.9 Disorder of breast, unspecified