2020 ICD-10-CM Diagnosis Code N64.4

Mastodynia

    2016 2017 2018 2019 2020 Billable/Specific Code
  • N64.4 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 N64.4 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of N64.4 - other international versions of ICD-10 N64.4 may differ.
The following code(s) above N64.4 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 N64.4:
  • 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
  • Bilateral mastodynia
  • Left mastodynia
  • Mastodynia (breast pain)
  • Mastodynia of bilateral breasts
  • Mastodynia of left breast
  • Pain of breast
  • Right mastodynia
Clinical Information
  • A disorder characterized by marked discomfort sensation in the breast region.
  • Pain in the breast generally classified as cyclical (associated with menstrual periods), or noncyclical, i.e. Originating from the breast or nearby muscles or joints, ranging from minor discomfort to severely incapacitating.
  • Painful sensation in the breast region.
ICD-10-CM N64.4 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 N64.4 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 N64.4:
  • Type 1 Excludes: R52
    ICD-10-CM Diagnosis Code R52

    Pain, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Acute pain NOS
    • Generalized pain NOS
    • Pain NOS
    Type 1 Excludes
    • acute and chronic pain, not elsewhere classified (G89.-)
    • localized pain, unspecified type - code to pain by site, such as:
    • abdomen pain (R10.-)
    • back pain (M54.9)
    • breast pain (N64.4)
    • chest pain (R07.1-R07.9)
    • ear pain (H92.0-)
    • eye pain (H57.1)
    • headache (R51)
    • joint pain (M25.5-)
    • limb pain (M79.6-)
    • lumbar region pain (M54.5)
    • pelvic and perineal pain (R10.2)
    • shoulder pain (M25.51-)
    • spine pain (M54.-)
    • throat pain (R07.0)
    • tongue pain (K14.6)
    • tooth pain (K08.8)
    • renal colic (N23)
    • pain disorders exclusively related to psychological factors (F45.41)
  • Type 2 Excludes: G89
    , R07
    ICD-10-CM Diagnosis Code G89

    Pain, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • related psychological factors associated with pain (F45.42)
    Type 1 Excludes
    • generalized pain NOS (R52)
    • pain disorders exclusively related to psychological factors (F45.41)
    • pain NOS (R52)
    Type 2 Excludes
    ICD-10-CM Diagnosis Code R07

    Pain in throat and chest

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes

Diagnosis Index entries containing back-references to N64.4:
  • Mastalgia N64.4
  • Mastodynia N64.4
  • Pain(s) R52
    - see also Painful
    ICD-10-CM Diagnosis Code R52

    Pain, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Acute pain NOS
    • Generalized pain NOS
    • Pain NOS
    Type 1 Excludes
    • acute and chronic pain, not elsewhere classified (G89.-)
    • localized pain, unspecified type - code to pain by site, such as:
    • abdomen pain (R10.-)
    • back pain (M54.9)
    • breast pain (N64.4)
    • chest pain (R07.1-R07.9)
    • ear pain (H92.0-)
    • eye pain (H57.1)
    • headache (R51)
    • joint pain (M25.5-)
    • limb pain (M79.6-)
    • lumbar region pain (M54.5)
    • pelvic and perineal pain (R10.2)
    • shoulder pain (M25.51-)
    • spine pain (M54.-)
    • throat pain (R07.0)
    • tongue pain (K14.6)
    • tooth pain (K08.8)
    • renal colic (N23)
    • pain disorders exclusively related to psychological factors (F45.41)
    • breast N64.4

ICD-10-CM Codes Adjacent To N64.4
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
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

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