`G0399` Home sleep test/type 3 porta

What G0399 is

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 long description, CMS October 2026 file. See the G codes page for the full section.

Medicare payment for G0399 (CY2026)

This code has no Physician Fee Schedule rate: Carrier-priced - the Medicare contractor sets the price. It may be paid under a different fee schedule (clinical laboratory, DMEPOS, anesthesia) or not paid at all - check the relevant CMS schedule.

Medically Unlikely Edit (MUE)

Medicare caps G0399 at 1 unit per date of service for practitioner claims (MAI 2 - date of service edit (absolute): units above the MUE never pay), rationale: Code Descriptor / CPT Instruction. Units above the cap are denied unless the edit's adjudication rules allow an appeal with documentation.

Billed with G0399? These codes are bundled into it

G0399 is a Column 1 code in 92 active NCCI PTP edits. When one of these Column 2 codes is reported on the same date of service, it is denied as bundled - unless the edit's modifier indicator is 1 and documentation supports a distinct service with an NCCI-associated modifier.

Column 2 code	Short description	Modifier indicator
`0733T`	Rem r-t mtn nrehab ther sply	0 - no modifier bypass	Check pair
`0903T`	Ecg alg 12 lead reduced i&r	1 - modifier may bypass	Check pair
`0904T`	Ecg alg 12 ld rdcd trcg only	1 - modifier may bypass	Check pair
`0905T`	Ecg alg 12 ld rdcd i&r only	1 - modifier may bypass	Check pair
`0937T`	Xtrnl ecg rec>15d<30d	1 - modifier may bypass	Check pair
`0938T`	Xtrnl ecg rec>15d<30d rec	1 - modifier may bypass	Check pair
`0939T`	Xtrnl ecg rec>15d<30d scan	1 - modifier may bypass	Check pair
`0940T`	Xtrnl ecg rec>15d<30d r&i	1 - modifier may bypass	Check pair
`36591`	Draw blood off venous device	0 - no modifier bypass	Check pair
`36592`	Collect blood from picc	0 - no modifier bypass	Check pair
`92270`	Electro-oculography w/i&r	0 - no modifier bypass	Check pair
`93000`	Electrocardiogram complete	1 - modifier may bypass	Check pair
`93005`	Electrocardiogram tracing	1 - modifier may bypass	Check pair
`93010`	Electrocardiogram report	1 - modifier may bypass	Check pair
`93040`	Rhythm ecg with report	1 - modifier may bypass	Check pair
`93041`	Rhythm ecg tracing	1 - modifier may bypass	Check pair
`93042`	Rhythm ecg report	1 - modifier may bypass	Check pair
`93224`	Xtrnl ecg rec up to 48 hrs	0 - no modifier bypass	Check pair
`93225`	Xtrnl ecg rec<48 hrs rec	0 - no modifier bypass	Check pair
`93226`	Xtrnl ecg rec<48 hr scan a/r	0 - no modifier bypass	Check pair
`93227`	Xtrnl ecg rec<48 hr r&i	0 - no modifier bypass	Check pair
`93241`	Xtrnl ecg rec>48hr<7d	0 - no modifier bypass	Check pair
`93242`	Ext ecg>48hr<7d recording	0 - no modifier bypass	Check pair
`93243`	Ext ecg>48hr<7d scan a/r	0 - no modifier bypass	Check pair
`93244`	Ext ecg>48hr<7d rev&interpj	0 - no modifier bypass	Check pair
`93245`	Ext ecg>7d<15d rec scan a/r	0 - no modifier bypass	Check pair
`93246`	Ext ecg>7d<15d recording	0 - no modifier bypass	Check pair
`93247`	Ext ecg>7d<15d scan a/r	0 - no modifier bypass	Check pair
`93248`	Ext ecg>7d<15d rev&interpj	0 - no modifier bypass	Check pair
`94200`	Lung function test (mbc/mvv)	1 - modifier may bypass	Check pair

Showing 30 of 92 column 2 codes. Use the pair checker for any specific combination.

G0399 is bundled into these codes

G0399 appears as a Column 2 code in 11 active edits. Reported with one of these Column 1 codes on the same date of service, G0399 is the code that denies.

Column 1 code	Short description
`95782`	Polysom <6 yrs 4/> paramtrs	Check pair
`95783`	Polysom <6 yrs cpap/bilvl	Check pair
`95800`	Slp stdy unattended	Check pair
`95801`	Slp stdy unatnd w/anal	Check pair
`95805`	Multiple sleep latency test	Check pair
`95806`	Sleep study unatt&resp efft	Check pair
`95807`	Sleep study attended	Check pair
`95808`	Polysom any age 1-3> param	Check pair
`95810`	Polysom 6/> yrs 4/> param	Check pair
`95811`	Polysom 6/>yrs cpap 4/> parm	Check pair
`G0398`	Home sleep test/type 2 porta	Check pair

Data: CMS CY2026 Physician Fee Schedule RVU file (October release, RVU26D) and Medicare NCCI PTP practitioner edits v32.3 (2026 Q4). Verify against the official files before billing or contracting decisions.