How much does Medicare pay for CPT 83945?

Medicare allowed an average of $14.15 per service and paid $14.15 of that, the balance being the patient's coinsurance and deductible (2024 data). Providers submitted an average of $84.90, which is what they billed rather than what they received — Medicare pays its fee schedule regardless of the charge.

What is CPT code 83945?

Oxalate level. It was billed 69,568 times to 56,127 Medicare beneficiaries by 70 providers in 2024.

Which specialty bills 83945 most?

Clinical Laboratory, with 69,547 services from 69 clinicians. Next are Pathology.

CPT 83945

Oxalate level

$14.15Medicare-allowed amount per service, averaged across 69,568 services

Providers submitted

$84.90

Asking price, not received

Medicare allowed

$14.15

The fee schedule figure

Medicare paid

$14.15

Balance is patient coinsurance

Providers submitted an average of $84.90 for this code and Medicare allowed $14.15 — 6.0× 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 $14.15 (100%); the rest is the patient’s coinsurance and deductible.

Services: 69,568
Beneficiaries: 56,127
Providers billing it: 70
Total allowed: $984,387

What Medicare pays for CPT 83945

Across 69,568 services billed by 70 providers to 56,127 beneficiaries, Medicare allowed an average of $14.15 per service. That is 1.2 services per beneficiary, so this is a code patients typically receive more than once. 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 83945

Specialty	Services	Beneficiaries	Avg allowed	Providers
Clinical Laboratory	69,547	56,108	$14.15	69
Pathology	21	19	$14.16	1

83945 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
Illinois	55,390	$14.16	$14.16	2
Oklahoma	2,639	$14.16	$14.16	4
Florida	2,171	$14.14	$14.16	4
California	1,973	$13.99	$14.16	8
Texas	1,372	$14.13	$14.16	5
Minnesota	1,215	$14.14	$14.16	3
Arizona	842	$14.11	$14.16	3
New Jersey	720	$14.16	$14.16	4
North Carolina	572	$14.16	$14.16	1
Kansas	465	$14.16	$14.16	2
Tennessee	296	$14.07	$14.16	2
Wisconsin	269	$14.02	$14.16	3
Pennsylvania	261	$14.16	$14.16	3
Georgia	217	$14.16	$14.16	1
Massachusetts	172	$14.16	$14.16	2
Ohio	171	$14.16	$14.16	5
Hawaii	133	$14.05	$14.16	2
New York	118	$14.16	$14.16	3
Utah	101	$14.16	$14.16	2
Nevada	87	$14.16	$14.16	1
Washington	85	$14.16	$14.16	2
Oregon	77	$14.16	$14.16	1
Colorado	64	$14.16	$14.16	1
Alabama	39	$14.09	$14.16	1
New Mexico	35	$14.16	$14.16	1
Maryland	32	$14.16	$14.16	1
Rhode Island	19	$14.16	$14.16	1
Indiana	18	$14.16	$14.16	1
Michigan	15	$14.16	$14.16	1

Related codes

83970Parathormone (parathyroid hormone) level$40.37
83921Organic acid level$20.73
83993Stool calprotectin (protein) level$19.22
83986Body fluid ph level$3.50
83935Urine osmolality (concentration) measurement$6.67
83930Blood osmolality (concentration) measurement$6.48
83937Osteocalcin (bone protein) level$29.21
83915Nucleotidase 5' (enzyme) level$10.93
83951Oncoprotein (cancer related gene) measurement$63.03

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.