R63.6
BillableUnderweight
Underweight
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
- code to identify body mass index (BMI), if known (Z68.-)
Also Known As / Clinical Terms
SNOMED CT
- AN - Anorexia nervosa56882008
- Anorexia nervosa56882008
- Skinny build61294007
- Thin build61294007
- Anorexia nervosa, binge-eating purging type63393005
- Anorexia nervosa, restricting subtype77675002
- Anorexia nervosa, restricting type77675002
- Low body weight248342006
- Underweight248342006
- Mild thinness in adulthood717931007
- Moderate thinness in adulthood717932000
- Severe thinness in adulthood717933005
- Anorexia nervosa co-occurrent with dangerously low body weight722959000
- Anorexia nervosa co-occurrent with significantly low body weight722960005
- Anorexia nervosa of restricting type with dangerously low body weight723917005
- Dangerously low body weight co-occurrent and due to anorexia nervosa of restricting type723917005
- Anorexia nervosa, binge-eating purging type with dangerously low body weight723918000
- Dangerously low body weight co-occurrent and due to anorexia nervosa of binge-eating purging type723918000
- Anorexia nervosa, restricting type with significantly low body weight723919008
- Significantly low body weight co-occurrent and due to anorexia nervosa of restricting type723919008
- Anorexia nervosa of binge-eating purging type with significantly low body weight723920002
- Significantly low body weight co-occurrent and due to anorexia nervosa of binge-eating purging type723920002
- Thin build in adult735540007
- Underweight in infancy762490009
- Underweight in childhood762491008
- Underweight in adolescence762492001
Frequently Asked Questions
What is ICD-10 code R63.6?
ICD-10-CM code R63.6 represents "Underweight". It is a billable/specific code that can be used on a claim.
Is R63.6 a billable code?
Yes, R63.6 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is R63.6 in?
R63.6 is in Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (codes R00-R99).
What codes cannot be used with R63.6?
R63.6 has Excludes1 notes indicating codes that cannot be used together with it, including: bulimia NOS (F50.2-); abnormal weight loss (R63.4); anorexia nervosa (F50.0-); and 1 more.
Are additional codes required with R63.6?
Yes, when using R63.6 you should also code: code to identify body mass index (BMI), if known (Z68.-).
What SNOMED CT codes does R63.6 map to?
R63.6 maps to 18 SNOMED CT concepts: 56882008, 722959000, 722960005, 723920002, 723917005, and 13 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for R63.6?
R63.6 is linked to 1 UMLS Concept Unique Identifier: C0041667. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.