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ICD-10-CM 2027

ICD-10 code for hypersomnia

G47.10

Hypersomnia, unspecified

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Hypersomnia (organic)”. Page updated September 29, 2026.

About coding hypersomnia

The ICD-10-CM code for hypersomnia is G47.10 (Hypersomnia, unspecified). The official index lists 40 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G47.10.

Within G47.1, choose G47.10 (unspecified) only when documentation doesn't support a more specific option: idiopathic hypersomnia with long sleep time (G47.11), idiopathic hypersomnia without long sleep time (G47.12), recurrent hypersomnia (G47.13), due to medical condition (G47.14) and other hypersomnia (G47.19).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 887 (Other Mental Disorder Diagnoses, relative weight 1.1139), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

More specific hypersomnia codes (official index)

  • due to
  • alcohol
  • abuse F10.182 — Alcohol abuse with alcohol-induced sleep disorder
  • dependence F10.282 — Alcohol dependence with alcohol-induced sleep disorder
  • use F10.982 — Alcohol use, unspecified with alcohol-induced sleep disorder
  • amphetamines
  • abuse F15.182 — Other stimulant abuse with stimulant-induced sleep disorder
  • dependence F15.282 — Other stimulant dependence with stimulant-induced sleep disorder
  • use F15.982 — Other stimulant use, unspecified with stimulant-induced sleep disorder
  • caffeine
  • abuse F15.182 — Other stimulant abuse with stimulant-induced sleep disorder
  • dependence F15.282 — Other stimulant dependence with stimulant-induced sleep disorder
  • use F15.982 — Other stimulant use, unspecified with stimulant-induced sleep disorder
  • cocaine
  • abuse F14.182 — Cocaine abuse with cocaine-induced sleep disorder
  • dependence F14.282 — Cocaine dependence with cocaine-induced sleep disorder
  • use F14.982 — Cocaine use, unspecified with cocaine-induced sleep disorder
  • drug NEC
  • abuse F19.182 — Other psychoactive substance abuse with psychoactive substance-induced sleep disorder
  • dependence F19.282 — Other psychoactive substance dependence with psychoactive substance-induced sleep disorder
  • use F19.982 — Other psychoactive substance use, unspecified with psychoactive substance-induced sleep disorder
  • medical condition G47.14 — Hypersomnia due to medical condition
  • mental disorder F51.13 — Hypersomnia due to other mental disorder
  • opioid
  • abuse F11.182 — Opioid abuse with opioid-induced sleep disorder
  • dependence F11.282 — Opioid dependence with opioid-induced sleep disorder
  • use F11.982 — Opioid use, unspecified with opioid-induced sleep disorder
  • psychoactive substance NEC
  • abuse F19.182 — Other psychoactive substance abuse with psychoactive substance-induced sleep disorder
  • dependence F19.282 — Other psychoactive substance dependence with psychoactive substance-induced sleep disorder
  • use F19.982 — Other psychoactive substance use, unspecified with psychoactive substance-induced sleep disorder
  • sedative, hypnotic, or anxiolytic
  • abuse F13.182 — Sedative, hypnotic or anxiolytic abuse with sedative, hypnotic or anxiolytic-induced sleep disorder
  • dependence F13.282 — Sedative, hypnotic or anxiolytic dependence with sedative, hypnotic or anxiolytic-induced sleep disorder
  • use F13.982 — Sedative, hypnotic or anxiolytic use, unspecified with sedative, hypnotic or anxiolytic-induced sleep disorder
  • stimulant NEC
  • abuse F15.182 — Other stimulant abuse with stimulant-induced sleep disorder
  • dependence F15.282 — Other stimulant dependence with stimulant-induced sleep disorder
  • use F15.982 — Other stimulant use, unspecified with stimulant-induced sleep disorder
  • idiopathic G47.11 — Idiopathic hypersomnia with long sleep time
  • with long sleep time G47.11 — Idiopathic hypersomnia with long sleep time
  • without long sleep time G47.12 — Idiopathic hypersomnia without long sleep time
  • menstrual related G47.13 — Recurrent hypersomnia
  • nonorganic origin F51.11 — Primary hypersomnia
  • specified NEC F51.19 — Other hypersomnia not due to a substance or known physiological condition
  • not due to a substance or known physiological condition F51.11 — Primary hypersomnia
  • specified NEC F51.19 — Other hypersomnia not due to a substance or known physiological condition
  • primary F51.11 — Primary hypersomnia
  • recurrent G47.13 — Recurrent hypersomnia
  • specified NEC G47.19 — Other hypersomnia

Common questions about hypersomnia ICD-10 codes

What is the ICD-10 code for hypersomnia?

G47.10 — Hypersomnia, unspecified. More specific codes apply when the documentation supports them: F10.182, F10.282, F10.982, F15.182 and others below.

What is the ICD-10 code for idiopathic hypersomnia?

G47.11 — Idiopathic hypersomnia with long sleep time.

What is the ICD-10 code for menstrual related hypersomnia?

G47.13 — Recurrent hypersomnia.

What is the ICD-10 code for nonorganic origin hypersomnia?

F51.11 — Primary hypersomnia.

What is the ICD-10 code for primary hypersomnia?

F51.11 — Primary hypersomnia.

What is the ICD-10 code for recurrent hypersomnia?

G47.13 — Recurrent hypersomnia.

Is G47.10 billable?

Yes. G47.10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G47.10 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G47.10 as a principal diagnosis.

Is G47.10 a CC or MCC?

No. G47.10 is neither a CC nor an MCC under MS-DRG v44.0.