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ICD-10-CM 2027

ICD-10 code for Anorexia

R63.0

Anorexia

✓ Billable / specific

Confirmed by the official ICD-10-CM index entry “anorexia”. Page updated September 29, 2026.

About coding Anorexia

The ICD-10-CM code for Anorexia is R63.0 (Anorexia). The official index lists 13 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.

Related Anorexia codes

  • F50.00 Anorexia nervosa, unspecified
  • F50.010 Anorexia nervosa, restricting type, mild
  • F50.011 Anorexia nervosa, restricting type, moderate
  • F50.012 Anorexia nervosa, restricting type, severe
  • F50.013 Anorexia nervosa, restricting type, extreme
  • F50.014 Anorexia nervosa, restricting type, in remission
  • F50.019 Anorexia nervosa, restricting type, unspecified
  • F50.020 Anorexia nervosa, binge eating/purging type, mild
  • F50.021 Anorexia nervosa, binge eating/purging type, moderate
  • F50.022 Anorexia nervosa, binge eating/purging type, severe
  • F50.023 Anorexia nervosa, binge eating/purging type, extreme
  • F50.024 Anorexia nervosa, binge eating/purging type, in remission
  • F50.029 Anorexia nervosa, binge eating/purging type, unspecified

Don't confuse with (Excludes1 for R63.0)

  • anorexia nervosa (F50.0-)
  • loss of appetite of nonorganic origin (F50.89)

Common questions about Anorexia ICD-10 codes

What is the ICD-10 code for Anorexia?

R63.0 — Anorexia. More specific codes apply when the documentation supports them: F50.00, F50.010, F50.011, F50.012 and others below.

What is the ICD-10 code for anorexia nervosa, unspecified?

F50.00 — Anorexia nervosa, unspecified.

What is the ICD-10 code for anorexia nervosa, restricting type, mild?

F50.010 — Anorexia nervosa, restricting type, mild.

What is the ICD-10 code for anorexia nervosa, restricting type, moderate?

F50.011 — Anorexia nervosa, restricting type, moderate.

What is the ICD-10 code for anorexia nervosa, restricting type, severe?

F50.012 — Anorexia nervosa, restricting type, severe.

What is the ICD-10 code for anorexia nervosa, restricting type, extreme?

F50.013 — Anorexia nervosa, restricting type, extreme.

What is the ICD-10 code for anorexia nervosa, restricting type, in remission?

F50.014 — Anorexia nervosa, restricting type, in remission.

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.