G47.34: Idiopathic sleep related nonobstructive alveolar hypoventilation
G47.34, idiopathic sleep related nonobstructive alveolar hypoventilation, is listed as a covered diagnosis in 9 Medicare billing and coding articles that apply to 19 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 6 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 G47.34 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 | — | 6 |
| G0400 | Home sleep test (hst) with type iv portable monitor, unattended; minimum of 3 channels | Carrier judgment | — | 6 |
| 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 | — | 6 |
| G0238 | Therapeutic procedures to improve respiratory function, other than described by g0237, one on one, face to face, per 15 minutes (includes monitoring) | Carrier judgment | — | 1 |
| G0237 | Therapeutic procedures to increase strength or endurance of respiratory muscles, face to face, one on one, each 15 minutes (includes monitoring) | Carrier judgment | — | 1 |
| G0239 | Therapeutic procedures to improve respiratory function or increase strength or endurance of respiratory muscles, two or more individuals (includes monitoring) | Carrier judgment | — | 1 |
| G0451 | Development testing, with interpretation and report, per standardized instrument form | Carrier judgment | — | 1 |
| G0017 | Psychotherapy for crisis furnished in an applicable site of service (any place of service at which the non-facility rate for psychotherapy for crisis services applies, other than the office setting); first 60 minutes | Carrier judgment | — | 1 |
| G0018 | Psychotherapy for crisis furnished in an applicable site of service (any place of service at which the non-facility rate for psychotherapy for crisis services applies, other than the office setting); each additional 30 minutes (list separately in addition to code for primary service) | Carrier judgment | — | 1 |
| G0560 | Safety planning interventions, each 20 minutes personally performed by the billing practitioner, including assisting the patient in the identification of the following personalized elements of a safety plan: recognizing warning signs of an impending suicidal or substance use-related crisis; employing internal coping strategies; utilizing social contacts and social settings as a means of distraction from suicidal thoughts or risky substance use; utilizing family members, significant others, caregivers, and/or friends to help resolve the crisis; contacting mental health or substance use disorder professionals or agencies; and making the environment safe | Carrier judgment | — | 1 |
| G2187 | Patients with clinical indications for imaging of the head: head trauma | Carrier judgment | — | 1 |
| G2188 | Patients with clinical indications for imaging of the head: new or change in headache above 50 years of age | Carrier judgment | — | 1 |
| G2189 | Patients with clinical indications for imaging of the head: abnormal neurologic exam | Carrier judgment | — | 1 |
| G2190 | Patients with clinical indications for imaging of the head: headache radiating to the neck | Carrier judgment | — | 1 |
| G2191 | Patients with clinical indications for imaging of the head: positional headaches | Carrier judgment | — | 1 |
| G2192 | Patients with clinical indications for imaging of the head: temporal headaches in patients over 55 years of age | Carrier judgment | — | 1 |
| G2193 | Patients with clinical indications for imaging of the head: new onset headache in pre-school children or younger (<6 years of age) | Carrier judgment | — | 1 |
| G2194 | Patients with clinical indications for imaging of the head: new onset headache in pediatric patients with disabilities for which headache is a concern as inferred from behavior | Carrier judgment | — | 1 |
| G2195 | Patients with clinical indications for imaging of the head: occipital headache in children | Carrier judgment | — | 1 |
Medicare policy articles listing G47.34
- 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
- A56995: Billing and Coding: Polysomnography (Palmetto GBA (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L36593
- A57496: Billing and Coding: Polysomnography and Sleep Testing (First Coast Service Options, Inc. (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L33405
- A56923: Billing and Coding: Outpatient Sleep Studies (Novitas Solutions, Inc. (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L35050
- A56717: Billing and Coding: Respiratory Therapy (Respiratory Care) (Palmetto GBA (MAC - Part A); 3 Level II codes). LCD with the same title: L34430
- A57130: Billing and Coding: Psychiatric Codes (Novitas Solutions, Inc. (MAC - Part A, MAC - Part B); 4 Level II codes). LCD with the same title: L35101
- A56612: Billing and Coding: CT of the Head (Palmetto GBA (MAC - Part A, MAC - Part B); 9 Level II codes). LCD with the same title: L34417
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)
- G47.30 — Sleep apnea, unspecified
- G47.31 — Primary central sleep apnea
- G47.32 — High altitude periodic breathing
- G47.33 — Obstructive sleep apnea (adult) (pediatric)
- 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
- G47.10 — 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
- G47.411 — 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
- G47.9 — Sleep disorder, unspecified
Frequently asked questions
Does Medicare cover G47.34 (Idiopathic sleep related nonobstructive alveolar…)?
Medicare covers items and services, not diagnoses. 9 Medicare billing and coding articles list G47.34 as a covered diagnosis for 19 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 G47.34?
The Level II codes from the policies most specific to this diagnosis are G0399 (Home sleep test (hst) with type iii portable monitor…, 6 articles); G0400 (Home sleep test (hst) with type iv portable monitor…, 6 articles); G0398 (Home sleep study test (hst) with type ii portable monitor…, 6 articles); G0238 (Therapeutic procedures to improve respiratory function…, 1 article); G0237 (Therapeutic procedures to increase strength or endurance…, 1 article). Code choice depends on the item supplied; check each code's descriptor.
Which Medicare policy articles list G47.34?
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), and 6 more articles.
What is ICD-10-CM code G47.34?
G47.34 is the ICD-10-CM code for idiopathic sleep related nonobstructive alveolar hypoventilation, 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