G47.9: Sleep disorder, unspecified
G47.9, sleep disorder, unspecified, is listed as a covered diagnosis in 3 Medicare billing and coding articles that apply to 3 HCPCS Level II codes, including G0399 (Home sleep test (hst) with type iii portable monitor…), G0400 (Home sleep test (hst) with type iv portable monitor…), G0398 (Home sleep study test (hst) with type ii portable monitor…). The articles come from 3 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with G47.9 as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| G0399 | Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation | Carrier judgment | — | 3 |
| G0400 | Home sleep test (hst) with type iv portable monitor, unattended; minimum of 3 channels | Carrier judgment | — | 3 |
| G0398 | Home sleep study test (hst) with type ii portable monitor, unattended; minimum of 7 channels: eeg, eog, emg, ecg/heart rate, airflow, respiratory effort and oxygen saturation | Carrier judgment | — | 3 |
Medicare policy articles listing G47.9
- A57049: Billing and Coding: Polysomnography and Other Sleep Studies (CGS Administrators, LLC (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L36839, L36861, L36902
- A57697: Billing and Coding: Polysomnography and Other Sleep Studies (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L36839, L36861, L36902
- A56903: Billing and Coding: Polysomnography and Other Sleep Studies (WPS Insurance Corporation (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L36839, L36861, L36902
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Other G47 diagnoses (Sleep disorders)
- G47.10 — Hypersomnia, unspecified
- G47.11 — Idiopathic hypersomnia with long sleep time
- G47.12 — Idiopathic hypersomnia without long sleep time
- G47.13 — Recurrent hypersomnia
- G47.14 — Hypersomnia due to medical condition
- G47.19 — Other hypersomnia
- G47.30 — Sleep apnea, unspecified
- G47.31 — Primary central sleep apnea
- G47.32 — High altitude periodic breathing
- G47.33 — Obstructive sleep apnea (adult) (pediatric)
- G47.34 — Idiopathic sleep related nonobstructive alveolar hypoventilation
- G47.35 — Congenital central alveolar hypoventilation syndrome
- G47.36 — Sleep related hypoventilation in conditions classified elsewhere
- G47.37 — Central sleep apnea in conditions classified elsewhere
- G47.39 — Other sleep apnea
- G47.411 — Narcolepsy with cataplexy
- G47.419 — Narcolepsy without cataplexy
- G47.421 — Narcolepsy in conditions classified elsewhere with cataplexy
- G47.429 — Narcolepsy in conditions classified elsewhere without cataplexy
- G47.50 — Parasomnia, unspecified
- G47.51 — Confusional arousals
- G47.52 — REM sleep behavior disorder
- G47.53 — Recurrent isolated sleep paralysis
- G47.54 — Parasomnia in conditions classified elsewhere
- G47.59 — Other parasomnia
- G47.61 — Periodic limb movement disorder
- G47.8 — Other sleep disorders
Frequently asked questions
Does Medicare cover G47.9 (Sleep disorder, unspecified)?
Medicare covers items and services, not diagnoses. 3 Medicare billing and coding articles list G47.9 as a covered diagnosis for 3 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 G47.9?
The Level II codes from the policies most specific to this diagnosis are G0399 (Home sleep test (hst) with type iii portable monitor…, 3 articles); G0400 (Home sleep test (hst) with type iv portable monitor…, 3 articles); G0398 (Home sleep study test (hst) with type ii portable monitor…, 3 articles). Code choice depends on the item supplied; check each code's descriptor.
Which Medicare policy articles list G47.9?
A57049 (Billing and Coding: Polysomnography and Other Sleep Studies); A57697 (Billing and Coding: Polysomnography and Other Sleep Studies); A56903 (Billing and Coding: Polysomnography and Other Sleep Studies).
What is ICD-10-CM code G47.9?
G47.9 is the ICD-10-CM code for sleep disorder, unspecified, in category G47 (Sleep disorders), chapter 6: Diseases of the nervous system.
Next steps
- Run a reimbursement report for a device billed under G0399
- Watch G0399 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0399
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.
Chapter 6: Diseases of the nervous system · All diagnoses · HCPCS lookup