ICD-10-CM 2027
ICD-10 code for appetite loss
From the official ICD-10-CM alphabetic index entry “Loss (of) › appetite (see Anorexia)”. Page updated September 29, 2026.
About coding appetite loss
The ICD-10-CM code for appetite loss is R63.0 (Anorexia). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R63.0.
Within R63 (symptoms and signs concerning food and fluid intake), R63.0 is specifically for Anorexia. Related codes cover Polydipsia (R63.1), Polyphagia (R63.2), feeding difficulties (R63.3), abnormal weight loss (R63.4), abnormal weight gain (R63.5), Underweight (R63.6) and other symptoms and signs concerning food and fluid intake (R63.8).
Don't report R63.0 together with the conditions in its Excludes1 note: anorexia nervosa (F50.0-) and loss of appetite of nonorganic origin (F50.89).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific appetite loss codes (official index)
Don't confuse with (Excludes1 for R63.0)
Common questions about appetite loss ICD-10 codes
What is the ICD-10 code for appetite loss?
- R63.0 — Anorexia. More specific codes apply when the documentation supports them: F50.89, F50.89, F50.89.
What is the ICD-10 code for hysterical appetite loss?
- F50.89 — Other specified eating disorder.
What is the ICD-10 code for nonorganic origin appetite loss?
- F50.89 — Other specified eating disorder.
What is the ICD-10 code for psychogenic appetite loss?
- F50.89 — Other specified eating disorder.
Is R63.0 billable?
- Yes. R63.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R63.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R63.0 as a principal diagnosis.
Is R63.0 a CC or MCC?
- No. R63.0 is neither a CC nor an MCC under MS-DRG v44.0.