2019 ICD-10-CM Diagnosis Code N65.1

Disproportion of reconstructed breast

    2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
  • N65.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM N65.1 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of N65.1 - other international versions of ICD-10 N65.1 may differ.
ICD-10-CM Coding Rules
  • N65.1 is applicable to adult patients aged 15 - 124 years inclusive.
Applicable To
  • Breast asymmetry between native breast and reconstructed breast
  • Disproportion between native breast and reconstructed breast
The following code(s) above N65.1 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 N65.1:
  • N00-N99
    2019 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
    2019 ICD-10-CM Range N60-N65

    Disorders of breast

    Type 1 Excludes
    • disorders of breast associated with childbirth (O91-O92)
    Disorders of breast
Approximate Synonyms
  • Disproportion of reconstructed left breast
  • Disproportion of reconstructed right breast
  • Left reconstructed breast disproportion
  • Right reconstructed breast disproportion
ICD-10-CM N65.1 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 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 N65.1 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
Code annotations containing back-references to N65.1:
  • Type 1 Excludes: N62
    , N64.81
    , N64.82
    , Z42.1
    ICD-10-CM Diagnosis Code N62

    Hypertrophy of breast

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Gynecomastia
    • Hypertrophy of breast NOS
    • Massive pubertal hypertrophy of breast
    Type 1 Excludes
    • breast engorgement of newborn (P83.4)
    • disproportion of reconstructed breast (N65.1)
    ICD-10-CM Diagnosis Code N64.81

    Ptosis of breast

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
    Type 1 Excludes
    • ptosis of native breast in relation to reconstructed breast (N65.1)
    ICD-10-CM Diagnosis Code N64.82

    Hypoplasia of breast

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
    Applicable To
    • Micromastia
    Type 1 Excludes
    • congenital absence of breast (Q83.0)
    • hypoplasia of native breast in relation to reconstructed breast (N65.1)
    ICD-10-CM Diagnosis Code Z42.1

    Encounter for breast reconstruction following mastectomy

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years) POA Exempt
    Type 1 Excludes
    • deformity and disproportion of reconstructed breast (N65.1-)

Diagnosis Index entries containing back-references to N65.1:
  • Asymmetry - see also Distortion
    • between native and reconstructed breast N65.1
  • Complication(s) (from) (of)
    • reconstructed breast
      • asymmetry between native and reconstructed breast N65.1
      • disproportion between native and reconstructed breast N65.1
  • Disproportion
    • between native and reconstructed breast N65.1

ICD-10-CM Codes Adjacent To N65.1
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
N70.1 Chronic salpingitis and oophoritis
N70.11 Chronic salpingitis
N70.12 Chronic oophoritis
N70.13 Chronic salpingitis and oophoritis
N70.9 Salpingitis and oophoritis, unspecified

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