R63.5 Abnormal weight gain

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• excessive weight gain in pregnancy (O26.0-)
• obesity (E66.-)

Applies from R63 Symptoms and signs concerning food and fluid intake

Excludes1 (never code together)

• bulimia NOS (F50.2-)

MS-DRG index

Defines the logic of DRG(s) 640-641 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 783.1 Abnormal weight gain

Diagnosis Index entries for R63.5

• Excess, excessive, excessively › weight › gain
• Weight › gain (abnormal) (excessive)

Nearby codes

• R63.30 Feeding difficulties, unspecified
• R63.31 Pediatric feeding disorder, acute
• R63.32 Pediatric feeding disorder, chronic
• R63.39 Other feeding difficulties
• R63.4 Abnormal weight loss
• R63.5 Abnormal weight gain (this code)
• R63.6 Underweight
• R63.8 Other symptoms and signs concerning food and fluid intake