R63.6 - Underweight
| ICD-10: | R63.6 |
| Short Description: | Underweight |
| Long Description: | Underweight |
| Status: | Valid for Submission |
| Version: | ICD-10-CM 2023 |
| Code Classification: |
R63.6 is a billable ICD-10 code used to specify a medical diagnosis of underweight. 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:
- Anorexia nervosa co-occurrent with dangerously low body weight
- Anorexia nervosa co-occurrent with significantly low body weight
- Anorexia nervosa, binge-eating purging type
- Anorexia nervosa, binge-eating purging type
- Anorexia nervosa, restricting type
- Anorexia nervosa, restricting type
- Dangerously low body weight co-occurrent and due to anorexia nervosa of binge-eating purging type
- Dangerously low body weight co-occurrent and due to anorexia nervosa of restricting type
- Mild thinness in adulthood
- Moderate thinness in adulthood
- Severe thinness in adulthood
- Significantly low body weight co-occurrent and due to anorexia nervosa of binge-eating purging type
- Significantly low body weight co-occurrent and due to anorexia nervosa of restricting type
- Thin build
- Thin build
- Thin build
- Thin build in adult
- Thin build in adult
- Thin build in adult
- Underweight
- Underweight in adolescence
- Underweight in childhood
- Underweight in infancy
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to this diagnosis code:
Use Additional Code
Use Additional CodeThe “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code to identify body mass index BMI, if known Z68
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
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:
- - Underweight - R63.6
Convert to ICD-9 Code
| Source ICD-10 Code | Target ICD-9 Code | |
|---|---|---|
| R63.6 | 783.22 - Underweight |
Patient Education
Body Weight
Do you know if your current weight is healthy? "Underweight", "normal", "overweight", and "obese" are all labels for ranges of weight. Obese and overweight mean that your weight is greater than it should be for your health. Underweight means that it is lower than it should be for your health. Your healthy body weight depends on your sex and height. For children, it also depends on your age.
A sudden, unexpected change in weight can be a sign of a medical problem. Causes for sudden weight loss can include:
- Thyroid problems
- Cancer
- Infectious diseases
- Digestive diseases
- Certain medicines
Sudden weight gain can be due to medicines, thyroid problems, heart failure, and kidney disease.
Good nutrition and exercise can help in losing weight. Eating extra calories within a well-balanced diet and treating any underlying medical problems can help to add weight.
[Learn More in MedlinePlus]
Code History
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)
