G8844 HCPCS Level II code: Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial…
G8844 is the HCPCS code for “Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial evaluation for suspected obstructive sleep…” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
G8844Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial evaluation for suspected obstructive sleep apnea, reason not given
Short description: No ahi rdi rei ini dx no rsn
HCPCS · United States
Medicare details
The indicators CMS publishes with G8844 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)
- Type of service
- Medical care
- BETOS category
- Specialist - psychiatry
- Added
- Jan 1, 2012
Where G8844 sits
- 1G codesProcedures and professional services
- 2Active code G8844Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial evaluation for suspected obstructive sleep apnea, reason not given
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code G8844 mean?
G8844 is the HCPCS code for “Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months after initial evaluation for suspected obstructive sleep apnea, reason not given” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover G8844?
CMS lists G8844’s Medicare coverage as “Carrier judgment” and its pricing as “Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside G8844
All G codesG8838Patient not discharged to home by post-operative day #2 following ceaG8839Sleep apnea symptoms assessed, including presence or absence of snoring and daytime sleepinessG8840Documentation of reason(s) for not documenting an assessment of sleep symptoms (e.g., patient didn't have initial daytime sleepiness, patient visited between initial testing and…G8841Sleep apnea symptoms not assessed, reason not givenG8842Apnea hypopnea index (ahi), respiratory disturbance index (rdi) or respiratory event index (rei) documented or measured within 2 months after initial evaluation for suspected…G8843Documentation of reason(s) for not measuring an apnea hypopnea index (ahi), a respiratory disturbance index (rdi), or a respiratory event index (rei) within 2 months after…G8845Positive airway pressure therapy prescribedG8846Moderate or severe obstructive sleep apnea (apnea hypopnea index (ahi) or respiratory disturbance index (rdi) of 15 or greater)G8848Mild obstructive sleep apnea (apnea hypopnea index (ahi) or respiratory disturbance index (rdi) of less than 15)G8849Documentation of reason(s) for not prescribing positive airway pressure therapy (e.g., patient unable to tolerate, alternative therapies use, patient declined, financial…G8850Positive airway pressure therapy not prescribed, reason not givenG8851Adherence to therapy was assessed at least annually through an objective informatics system or through self-reporting (if objective reporting is not available, documented)