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
HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)
HCPCS codeG0399
- Long description
- 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
- Short description
- Home sleep test/type 3 porta
- Pricing indicator
13Priced by the Medicare contractor (carrier)- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
T2DOther tests - other- Added
- March 13, 2008
- Last change
- March 13, 2008 – No change
Frequently asked questions
What is HCPCS code G0399?
G0399 is a HCPCS Level II code for 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.
Does Medicare cover G0399?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby G codes
- G0382 – Level 3 hospital emergency department visit provided in a type b emergency department; (the ed must meet at least one of the following requirements: (1) it is licensed by the state in which it is located under applicable state law as an emergency room or emergency department; (2) it is held out to the public (by name, posted signs, advertising, or other means) as a place that provides care for emergency medical conditions on an urgent basis without requiring a previously scheduled appointment; or (3) during the calendar year immediately preceding the calendar year in which a determination under 42 cfr 489.24 is being made, based on a representative sample of patient visits that occurred during that calendar year, it provides at least one-third of all of its outpatient visits for the treatment of emergency medical conditions on an urgent basis without requiring a previously scheduled appointment)
- G0383 – Level 4 hospital emergency department visit provided in a type b emergency department; (the ed must meet at least one of the following requirements: (1) it is licensed by the state in which it is located under applicable state law as an emergency room or emergency department; (2) it is held out to the public (by name, posted signs, advertising, or other means) as a place that provides care for emergency medical conditions on an urgent basis without requiring a previously scheduled appointment; or (3) during the calendar year immediately preceding the calendar year in which a determination under 42 cfr 489.24 is being made, based on a representative sample of patient visits that occurred during that calendar year, it provides at least one-third of all of its outpatient visits for the treatment of emergency medical conditions on an urgent basis without requiring a previously scheduled appointment)
- G0384 – Level 5 hospital emergency department visit provided in a type b emergency department; (the ed must meet at least one of the following requirements: (1) it is licensed by the state in which it is located under applicable state law as an emergency room or emergency department; (2) it is held out to the public (by name, posted signs, advertising, or other means) as a place that provides care for emergency medical conditions on an urgent basis without requiring a previously scheduled appointment; or (3) during the calendar year immediately preceding the calendar year in which a determination under 42 cfr 489.24 is being made, based on a representative sample of patient visits that occurred during that calendar year, it provides at least one-third of all of its outpatient visits for the treatment of emergency medical conditions on an urgent basis without requiring a previously scheduled appointment)
- G0389 – Ultrasound b-scan and/or real time with image documentation; for abdominal aortic aneurysm (aaa) screening
- G0390 – Trauma response team associated with hospital critical care service
- G0396 – Alcohol and/or substance (other than tobacco) misuse structured assessment (e.g., audit, dast), and brief intervention 15 to 30 minutes
- G0397 – Alcohol and/or substance (other than tobacco) misuse structured assessment (e.g., audit, dast), and intervention, greater than 30 minutes
- 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
- G0400 – Home sleep test (hst) with type iv portable monitor, unattended; minimum of 3 channels
- G0402 – Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
- G0403 – Electrocardiogram, routine ecg with 12 leads; performed as a screening for the initial preventive physical examination with interpretation and report
- G0404 – Electrocardiogram, routine ecg with 12 leads; tracing only, without interpretation and report, performed as a screening for the initial preventive physical examination
- G0405 – Electrocardiogram, routine ecg with 12 leads; interpretation and report only, performed as a screening for the initial preventive physical examination
- G0406 – Follow-up inpatient consultation, limited, physicians typically spend 15 minutes communicating with the patient via telehealth
- G0407 – Follow-up inpatient consultation, intermediate, physicians typically spend 25 minutes communicating with the patient via telehealth
- G0408 – Follow-up inpatient consultation, complex, physicians typically spend 35 minutes communicating with the patient via telehealth
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.