R63.4 - Abnormal weight loss

Version 2023
No Valid Principal Dx
ICD-10:R63.4
Short Description:Abnormal weight loss
Long Description:Abnormal weight loss
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • General symptoms and signs (R50-R69)
      • Symptoms and signs concerning food and fluid intake (R63)

R63.4 is a billable ICD-10 code used to specify a medical diagnosis of abnormal weight loss. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Clinical Information

Index to Diseases and Injuries References

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
R63.4783.21 - Abnormal loss of weight

Patient Education


Weight Control

Keeping a healthy weight is crucial. If you are underweight or overweight, or have obesity, you may have a higher risk of certain health problems.

About two thirds of adults in the U.S. are overweight or have obesity. Achieving a healthy weight can help you control your cholesterol, blood pressure and blood sugar. It might also help you prevent weight-related diseases, such as heart disease, diabetes, arthritis and some cancers.

Eating too much or not being physically active enough will make you overweight. To maintain your weight, the calories you eat must equal the energy you burn. To lose weight, you must use more calories than you eat. A weight-control strategy might include:

Eating extra calories within a well-balanced diet can help to add weight.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


[Learn More in MedlinePlus]

Code History