2021 ICD-10-CM Code R63.6
Underweight
Valid for Submission
R63.6 is a billable diagnosis code used to specify a medical diagnosis of underweight. The code R63.6 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code R63.6 might also be used to specify conditions or terms like anorexia nervosa, anorexia nervosa, anorexia nervosa, anorexia nervosa, anorexia nervosa , anorexia nervosa, etc.
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.
Code Classification
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 guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code R63.6:
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
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 the code R63.6 are found in the index:
- - Underweight - R63.6
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Anorexia nervosa
- Anorexia nervosa
- Anorexia nervosa
- Anorexia nervosa
- Anorexia nervosa
- Anorexia nervosa
- 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
- Moderate underweight in infancy childhood and adolescence
- O/E - Underweight
- O/E - weight
- O/E - weight greater than 20% below ideal
- O/E -weight 10-20% below ideal
- Severe thinness in adulthood
- Severe underweight in infancy childhood and adolescence
- 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
Clinical Information
- THINNESS-. a state of insufficient flesh on the body usually defined as having a body weight less than skeletal and physical standards. depending on age sex and genetic background a body mass index of less than 18.5 is considered as underweight.
Diagnostic Related Groups - MS-DRG Mapping
The ICD-10 code R63.6 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2020 through 09/30/2021.
Convert R63.6 to ICD-9 Code
- 783.22 - Underweight
Information for Patients
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.
- Body mass index (Medical Encyclopedia)
- Growth chart (Medical Encyclopedia)
- Overweight (Medical Encyclopedia)
- Weight gain - unintentional (Medical Encyclopedia)
- Weight loss - unintentional (Medical Encyclopedia)
[Learn More]
Code History
- 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)