2021 ICD-10-CM Diagnosis Code R63.4

Abnormal weight loss

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • R63.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM R63.4 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of R63.4 - other international versions of ICD-10 R63.4 may differ.
The following code(s) above R63.4 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 R63.4:
  • R00-R99
    2021 ICD-10-CM Range R00-R99

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

    Note
    • This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
    • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
    • The conditions and signs or symptoms included in categories R00-R94 consist of:
    • (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
    • (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
    • (c) provisional diagnosis in a patient who failed to return for further investigation or care;
    • (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
    • (e) cases in which a more precise diagnosis was not available for any other reason;
    • (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
    Type 2 Excludes
    • abnormal findings on antenatal screening of mother (O28.-)
    • certain conditions originating in the perinatal period (P04-P96)
    • signs and symptoms classified in the body system chapters
    • signs and symptoms of breast (N63, N64.5)
    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • R63
    ICD-10-CM Diagnosis Code R63

    Symptoms and signs concerning food and fluid intake

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Symptoms and signs concerning food and fluid intake
Approximate Synonyms
  • Abnormal intentional loss of weight
  • Abnormal intentional weight loss
  • Abnormal loss of weight
  • Intentional weight loss
  • Unintentional weight loss
ICD-10-CM R63.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 640 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes with mcc
  • 641 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes without mcc

Convert R63.4 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
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to R63.4:
  • Type 1 Excludes: R63.6
    , R64
    ICD-10-CM Diagnosis Code R63.6

    Underweight

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Type 1 Excludes
    Use Additional
    • code to identify body mass index (BMI), if known (Z68.-)
    ICD-10-CM Diagnosis Code R64

    Cachexia

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Wasting syndrome
    Code First
    • underlying condition, if known
    Type 1 Excludes
    • abnormal weight loss (R63.4)
    • nutritional marasmus (E41)
  • Use Additional: U07.0
    ICD-10-CM Diagnosis Code U07.0

    Vaping-related disorder

      2021 - New Code Billable/Specific Code
    Applicable To
    • Dabbing related lung damage
    • Dabbing related lung injury
    • E-cigarette, or vaping, product use associated lung injury [EVALI]
    • Electronic cigarette related lung damage
    • Electronic cigarette related lung injury
    Use Additional
    • code to identify manifestations, such as:
    • abdominal pain (R10.84)
    • acute respiratory distress syndrome (J80)
    • diarrhea (R19.7)
    • drug-induced interstitial lung disorder (J70.4)
    • lipoid pneumonia (J69.1)
    • weight loss (R63.4)

Diagnosis Index entries containing back-references to R63.4:

ICD-10-CM Codes Adjacent To R63.4
R62.50 Unspecified lack of expected normal physiological development in childhood
R62.51 Failure to thrive (child)
R62.52 Short stature (child)
R62.59 Other lack of expected normal physiological development in childhood
R62.7 Adult failure to thrive
R63 Symptoms and signs concerning food and fluid intake
R63.0 Anorexia
R63.1 Polydipsia
R63.2 Polyphagia
R63.3 Feeding difficulties
R63.4 Abnormal weight loss
R63.5 Abnormal weight gain
R63.6 Underweight
R63.8 Other symptoms and signs concerning food and fluid intake
R64 Cachexia
R65 Symptoms and signs specifically associated with systemic inflammation and infection
R65.1 Systemic inflammatory response syndrome (SIRS) of non-infectious origin
R65.10 …… without acute organ dysfunction
R65.11 …… with acute organ dysfunction
R65.2 Severe sepsis
R65.20 …… without septic shock

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