2020 ICD-10-CM Diagnosis Code N64.9

Disorder of breast, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • N64.9 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 N64.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N64.9 - other international versions of ICD-10 N64.9 may differ.
The following code(s) above N64.9 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 N64.9:
  • 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
  • Disease of breast
  • Disorder of breast
Clinical Information
  • A non-neoplastic or neoplastic disorder that affects the breast. Representative examples of non-neoplastic disorders include fibrocystic disease, gynecomastia, and mastitis. Representative examples of neoplastic disorders include fibroadenoma, lobular neoplasia, carcinoma, lymphoma, and sarcoma.
  • Disease or disorder of the breast.
  • Most women experience breast changes at some time. Your age, hormone levels and medicines you take may cause lumps, bumps and discharges. If you have a breast lump, pain, discharge or skin irritation, see your health care provider. Minor and serious breast problems have similar symptoms. Although many women fear cancer, most breast problems are not cancer.some common causes of breast changes are
    • fibrocystic breast condition - lumpiness, thickening and swelling, often associated with a woman's period
    • cysts - fluid-filled lumps
    • fibroadenomas - solid, round, rubbery lumps that move easily when pushed, occurring most in younger women
    • intraductal papillomas - growths similar to warts near the nipple
    • blocked or clogged milk ducts
    • milk production when a woman is not breastfeeding
    • injury
    nih: national cancer institute
  • Pathological processes of the breast.
ICD-10-CM N64.9 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 N64.9 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

Diagnosis Index entries containing back-references to N64.9:

ICD-10-CM Codes Adjacent To N64.9
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
N70.1 Chronic salpingitis and oophoritis
N70.11 Chronic salpingitis

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