R63.4
✓ Billable
Abnormal weight loss
ICD-10-CM · FY2026 · Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Code
R63.4
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code R63.4?
ICD-10-CM code R63.4 represents Abnormal weight loss. It is a billable diagnosis code in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective October 1, 2025 – September 30, 2026.
Is R63.4 billable?
Yes. R63.4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is R63.4 in?
R63.4 belongs to the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter (R00–R99) of ICD-10-CM.
Related codes in the R63 category
R63
Symptoms and signs concerning food and fluid intake
Non-billable
R63.0
Anorexia
Billable
R63.1
Polydipsia
Billable
R63.2
Polyphagia
Billable
R63.3
Feeding difficulties
Non-billable
R63.5
Abnormal weight gain
Billable
R63.6
Underweight
Billable
R63.8
Other symptoms and signs concerning food and fluid intake
Billable
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