HCPCS G0398
Status C No national payment amount. The Medicare Administrative Contractor establishes the price. Full definition → HCPCS Level IIHome sleep test/type 2 porta
No national payment amount
Carrier-priced: no national payment amount.
No national payment amount. The Medicare Administrative Contractor establishes the price.
Common questions
Why is there no payment amount for G0398?
Its status indicator is C (carrier-priced). No national payment amount. The Medicare Administrative Contractor establishes the price. The blank is deliberate: the amount is unknown or paid another way, not zero.
When does this rate change?
CMS publishes a fee schedule release every quarter (January, April, July, October). Each release is versioned here, so past quarters stay lookupable — see what changed each release, or get an email when a new release moves rates.
Sources: CMS Medicare Physician Fee Schedule Relative Value Files.
Saw this code on your bill?
What is a G0398 visit in patient-friendly terms?
In plain terms: Home sleep test/type 2 porta You'll typically see HCPCS G0398 on a bill or explanation of benefits (EOB) when a clinician performs or bills for this service.
How this amount is computed
amount = (work RVU × work GPCI + PE RVU × PE GPCI + MP RVU × MP GPCI) × conversion factor. National amounts use GPCI = 1.000.
| Component | RVU |
|---|---|
| Work RVU | blank |
| Practice expense RVU (non-facility) | blank |
| Practice expense RVU (facility) | blank |
| Malpractice RVU | blank |
Every rate combines three parts: work (the clinician’s time, skill and effort), practice expense (office overhead — higher when the service is done in a doctor’s own office), and malpractice (the share of liability-insurance cost). A value of blank means CMS publishes no national number for that part — which is not the same as zero.
Rate history by release
National non-facility amount for G0398 across quarterly releases.
Billing together (NCCI edits)
NCCI Q3 2026Per CMS's National Correct Coding Initiative. Hover a code for when it's used.
Never billable with G0398 on the same date of service
Billable with G0398 only with modifier 59, XE, XS, XP, or XU