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R63.6

Underweight

Billable

Code Hierarchy

R63R63.6

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Section: R50-R69 - General symptoms and signs

Coding Guidelines

Excludes1 (Mutually Exclusive)

These codes should never be used together with R63.6

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

Use Additional Code

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

Related Codes

R63.0Billable

Anorexia

R63.1Billable

Polydipsia

R63.2Billable

Polyphagia

R63.3Category

Feeding difficulties

R63.4Billable

Abnormal weight loss

R63.5Billable

Abnormal weight gain

R63.8Billable

Other symptoms and signs concerning food and fluid intake

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