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2. ICD-10 Codes
3. Chapter - R00-R99
4. Section - R50-R69
5. Category - R63
6. R63.6

R63.6 - Underweight

• Applicable to Underweight
• The 2025 edition of ICD10-CM R63.6 became effective on October 1, 2024.
• This is the American ICD10-CM version of R63.6 - other international versions of ICD10 R63.6 may differ.
• R63.6 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Code Additional Code:

• code to identify body mass index (BMI), if known (Z68.-)

Type 1 Excludes

• abnormal weight loss (R63.4)
• anorexia nervosa (F50.0-)
• malnutrition (E40-E46)

The following codes above R63.6 contain annotation back-references that may be applicable to R63.6:

• Chapter: R00-R99 - Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
• Section: R50-R69 - General symptoms and signs
• Category: R63 - Symptoms and signs concerning food and fluid intake

Browse other similar CM codes:

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