How much does Medicare pay for CPT 31298?

Medicare allowed an average of $4271.74 per service and paid $3391.96 of that, the balance being the patient's coinsurance and deductible (2024 data). Providers submitted an average of $14,428, which is what they billed rather than what they received — Medicare pays its fee schedule regardless of the charge.

What is CPT code 31298?

Dilation of sphenoid and frontal nasal sinus using an endoscope. It was billed 6,945 times to 6,789 Medicare beneficiaries by 192 providers in 2024.

Does 31298 pay differently in an office than a hospital?

Yes. The allowed amount averaged $4373.56 in an office setting and $890.22 in a facility. The office rate is generally higher because the practice supplies the room, staff and equipment out of that single payment; in a hospital those are billed separately by the facility.

Which specialty bills 31298 most?

Otolaryngology, with 6,676 services from 184 clinicians. Next are Physician Assistant, Ambulatory Surgical Center, Ophthalmology.

CPT 31298

Dilation of sphenoid and frontal nasal sinus using an endoscope

$4271.74Medicare-allowed amount per service, averaged across 6,945 services

Providers submitted

$14,428

Asking price, not received

Medicare allowed

$4271.74

The fee schedule figure

Medicare paid

$3391.96

Balance is patient coinsurance

Providers submitted an average of $14,428 for this code and Medicare allowed $4271.74 — 3.4× less. That gap is normal and means nothing on its own: Medicare pays its fee schedule regardless of what is billed, so the submitted figure describes a hospital chargemaster, not a price anyone paid. Of the allowed amount Medicare paid $3391.96 (79%); the rest is the patient’s coinsurance and deductible.

Office pays differently to hospital

Office / non-facility: $4373.56
Hospital / facility: $890.22

The office rate is higher because the practice supplies the room, staff and equipment out of that payment. In a hospital the facility bills those separately, so the clinician's share is smaller — the total cost to Medicare is usually higher, not lower. 6,742 services were billed in an office setting and 203 in a facility.

Services: 6,945
Beneficiaries: 6,789
Providers billing it: 192
Total allowed: $29,667,234

What Medicare pays for CPT 31298

Across 6,945 services billed by 192 providers to 6,789 beneficiaries, Medicare allowed an average of $4271.74 per service. The allowed amount is the figure that matters: it is what Medicare and the patient together owe, set by the fee schedule and adjusted for local practice costs. What a provider chose to submit has no bearing on it.

Who bills 31298

Specialty	Services	Beneficiaries	Avg allowed	Providers
Otolaryngology	6,676	6,580	$4383.42	184
Physician Assistant	125	122	$997.61	5
Ambulatory Surgical Center	117	60	$1290.60	2
Ophthalmology	27	27	$4733.68	1

31298 reimbursement by state

Two different numbers. Allowed is what Medicare actually allowed in that state, which includes the local practice-cost adjustment. Standardized strips that geographic adjustment out of the payment, so it is the column to use when comparing states — a difference there reflects how the code was billed, not what it costs to run a practice locally.

State	Services	Allowed	Standardized pmt	Providers
California	1,556	$4427.20	$3093.89	39
Texas	1,020	$4391.77	$3591.46	37
Arizona	962	$4185.70	$3461.98	12
Florida	760	$4393.27	$3536.38	18
Nevada	444	$4346.91	$3575.59	5
Oklahoma	273	$4362.61	$3600.80	2
Alabama	223	$3932.30	$3580.40	9
New York	193	$4842.16	$3577.64	8
Virginia	180	$4162.40	$3495.80	4
South Carolina	137	$3602.73	$3220.76	2
Indiana	135	$4022.01	$3636.07	4
Missouri	130	$4049.96	$3603.20	4
Illinois	91	$4166.52	$3360.29	5
North Carolina	90	$3982.03	$3317.83	5
Connecticut	88	$4614.68	$3575.29	3
Georgia	86	$4324.40	$3570.65	4
Louisiana	82	$2777.83	$2443.76	2
Mississippi	69	$3747.60	$3580.13	3
Ohio	55	$4091.33	$3638.09	2
New Jersey	54	$1763.11	$1186.12	3
Pennsylvania	52	$4521.27	$3597.81	3
Wisconsin	46	$3856.32	$3150.84	3
Oregon	44	$4124.59	$3254.40	2
Tennessee	39	$4162.10	$3614.63	3
Michigan	25	$4463.56	$3598.75	2
Maryland	21	$3806.12	$2979.55	1
District of Columbia	19	$5374.33	$3599.87	1
Iowa	13	$4707.54	$3623.51	1
Kentucky	13	$3821.15	$3525.93	1
Maine	12	$4986.94	$3618.19	1
Hawaii	11	$5218.55	$3622.68	1
West Virginia	11	$4060.85	$3703.79	1
Idaho	11	$3983.34	$3503.77	1

Related codes

31231Diagnostic exam of nasal passages$169.68
31237Biopsy or removal of nasal polyp or tissue$327.59
31295Dilation of nasal sinus$1974.90
31267Removal of nasal sinus tissue$951.39
31238Control of bleeding of nose$260.10
31276Exploration of nasal sinus$1053.25
31233Exam of nasal passage and sinus$337.56
31254Partial removal of nasal sinus$582.71
31256Incision of nasal sinus$535.88
31242Destruction of nasal nerve by heat$2439.75
31296Dilation of frontal nasal sinus$1854.89
31259Removal of tissue from sphenoid sinus$850.44

Billing this code is not the same as earning it

An allowed amount is revenue to a practice, not income to a clinician. It funds staff, premises, equipment and supplies before anyone is paid. What clinicians actually earn is published separately by the Department of Labor, and what industry pays them is published separately again by CMS — this site carries both.

What doctors are paid →·Look up a clinician →·All procedure codes →

Where this comes from. CMS Medicare Physician & Other Practitioners, by Provider and Service, 2024. It covers fee-for-service Original Medicare Part B only — not Medicare Advantage, not Medicaid, and not commercial insurance, which typically pays more for the same code.

How it is averaged. CMS publishes one average per provider per code. Every figure here is re-weighted by the number of services, so a clinician who billed the code 4,000 times counts 4,000 times more than one who billed it twice. CMS also suppresses any provider-code pair with fewer than 11 beneficiaries, so low-volume practice is missing from these totals by design.