ICD-10-CM 2027
ICD-10 code for insomnia
Confirmed by the official ICD-10-CM index entry “insomnia (organic)”. Page updated September 29, 2026.
About coding insomnia
The ICD-10-CM code for insomnia is G47.00 (Insomnia, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G47.00.
Within G47.0, choose G47.00 (unspecified) only when documentation doesn't support a more specific option: due to medical condition (G47.01) and other insomnia (G47.09).
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.
Related Insomnia codes
Common questions about insomnia ICD-10 codes
What is the ICD-10 code for insomnia?
- G47.00 — Insomnia, unspecified. More specific codes apply when the documentation supports them: G47.01, G47.09.
What is the ICD-10 code for insomnia due to medical condition?
- G47.01 — Insomnia due to medical condition.
What is the ICD-10 code for other insomnia?
- G47.09 — Other insomnia.
Is G47.00 billable?
- Yes. G47.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G47.00 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G47.00 as a principal diagnosis.
Is G47.00 a CC or MCC?
- No. G47.00 is neither a CC nor an MCC under MS-DRG v44.0.