N64.1

Fat necrosis of breast

Billable / specific

N64.1 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Fat necrosis (segmental) of breast

Excludes1

Not coded here — never report together with this code.

  • disorders of breast associated with childbirth (O91-O92) (from N64)

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96) (from N64)
  • certain infectious and parasitic diseases (A00-B99) (from N64)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from N64)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) (from N64)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from N64)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from N64)
  • neoplasms (C00-D49) (from N64)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from N64)
  • mechanical complication of breast prosthesis and implant (T85.4-) (from N64)

Code first

Sequence the underlying condition first.

  • breast necrosis due to breast graft (T85.898)

Also known as

  • Fat necrosis (segmental) of breast
  • Fat, necrosis, breast
  • Necrosis, necrotic, breast
  • Necrosis, necrotic, fat, fatty, breast
  • Necrosis, necrotic, mammary gland

Parent code

  • N64Other disorders of breastHeader

Related codes

  • N64.0Fissure and fistula of nippleBillable
  • N64.2Atrophy of breastBillable
  • N64.3Galactorrhea not associated with childbirthBillable
  • N64.4MastodyniaBillable
  • N64.5Other signs and symptoms in breastHeader
  • N64.8Other specified disorders of breastHeader
  • N64.9Disorder of breast, unspecifiedBillable

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