G47.9
Sleep disorder, unspecified
G47.9 (also written G479) is a billable ICD-10-CM diagnosis code for sleep disorder, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 43 codes in category G47 (Sleep disorders). The Alphabetic Index lists it under 5 entries. Its coding notes include 12 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Other clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026IPF Primary
IPF MS-DRG adjustment. A principal diagnosis of this code groups to this MS-DRG:
| MS-DRG | Description | Factor |
|---|---|---|
| 887 | Other mental disorder diagnoses | 1.00 |
Inclusion terms
Conditions classified to this code.
- Sleep disorder NOS
- Unspecified sleep-wake disorder
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 5 entries