2020 ICD-10-CM Diagnosis Code N64.82

Hypoplasia of breast

    2016 2017 2018 2019 2020 Billable/Specific Code Adult Dx (15-124 years)
  • N64.82 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM N64.82 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N64.82 - other international versions of ICD-10 N64.82 may differ.
ICD-10-CM Coding Rules
  • N64.82 is applicable to adult patients aged 15 - 124 years inclusive.
Applicable To
  • Micromastia
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as N64.82. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • congenital absence of breast (
    ICD-10-CM Diagnosis Code Q83.0

    Congenital absence of breast with absent nipple

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    Q83.0
    )
  • hypoplasia of native breast in relation to reconstructed breast (
    ICD-10-CM Diagnosis Code N65.1

    Disproportion of reconstructed breast

      2016 2017 2018 2019 2020 Billable/Specific Code Adult Dx (15-124 years)
    Applicable To
    • Breast asymmetry between native breast and reconstructed breast
    • Disproportion between native breast and reconstructed breast
    N65.1
    )
The following code(s) above N64.82 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 N64.82:
  • 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
  • N64
    ICD-10-CM Diagnosis Code N64

    Other disorders of breast

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • mechanical complication of breast prosthesis and implant (T85.4-)
    Other disorders of breast
Approximate Synonyms
  • Breast hypoplasia
Clinical Information
  • A disorder characterized by underdevelopment of the breast.
  • Underdevelopment of the breast.
ICD-10-CM N64.82 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 597 Malignant breast disorders with mcc
  • 598 Malignant breast disorders with cc
  • 599 Malignant breast disorders without cc/mcc
  • 600 Non-malignant breast disorders with cc/mcc
  • 601 Non-malignant breast disorders without cc/mcc

Convert N64.82 to ICD-9-CM

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
Code annotations containing back-references to N64.82:
  • Type 2 Excludes: Q83
    , Q83
    ICD-10-CM Diagnosis Code Q83

    Congenital malformations of breast

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    ICD-10-CM Diagnosis Code Q83

    Congenital malformations of breast

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes

Diagnosis Index entries containing back-references to N64.82:

ICD-10-CM Codes Adjacent To N64.82
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
N64.8 Other specified disorders of breast
N64.81 Ptosis of breast
N64.82 Hypoplasia of breast
N64.89 Other specified disorders of breast
N64.9 Disorder of breast, unspecified
N65 Deformity and disproportion of reconstructed breast
N65.0 Deformity of reconstructed breast
N65.1 Disproportion of reconstructed breast
N70 Salpingitis and oophoritis
N70.0 Acute salpingitis and oophoritis
N70.01 Acute salpingitis
N70.02 Acute oophoritis
N70.03 Acute salpingitis and oophoritis

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