2020 ICD-10-CM Diagnosis Code N64

Other disorders of breast

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • N64 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM N64 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N64 - other international versions of ICD-10 N64 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (N64) and the excluded code together.
  • mechanical complication of breast prosthesis and implant (
    ICD-10-CM Diagnosis Code T85.4

    Mechanical complication of breast prosthesis and implant

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    T85.4-
    )
The following code(s) above N64 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to N64:
  • N00-N99
    2020 ICD-10-CM Range N00-N99

    Diseases of the genitourinary system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the genitourinary system
  • N60-N65
    2020 ICD-10-CM Range N60-N65

    Disorders of breast

    Type 1 Excludes
    • disorders of breast associated with childbirth (O91-O92)
    Disorders of breast
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
ICD-10-CM Codes Adjacent To N64
N63.22 …… upper inner quadrant
N63.23 …… lower outer quadrant
N63.24 …… lower inner quadrant
N63.25 …… overlapping quadrants
N63.3 Unspecified lump in axillary tail
N63.31 …… of the right breast
N63.32 …… of the left breast
N63.4 Unspecified lump in breast, subareolar
N63.41 Unspecified lump in right breast, subareolar
N63.42 Unspecified lump in left breast, subareolar
N64 Other disorders of breast
N64.0 Fissure and fistula of nipple
N64.1 Fat necrosis of breast
N64.2 Atrophy of breast
N64.3 Galactorrhea not associated with childbirth
N64.4 Mastodynia
N64.5 Other signs and symptoms in breast
N64.51 Induration of breast
N64.52 Nipple discharge
N64.53 Retraction of nipple
N64.59 Other signs and symptoms in breast

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.