R63.6
BillableUnderweight
R63.6 is the ICD-10-CM code for Underweight. It is a billable, specific code valid for reimbursement.
R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Excludes1 — not coded here
Use additional code
- •code to identify body mass index (BMI), if known (Z68.-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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