How much does Medicare pay for CPT 84133?

Medicare allowed an average of $4.64 per service and paid $4.64 of that, the balance being the patient's coinsurance and deductible (2024 data). Providers submitted an average of $26.82, which is what they billed rather than what they received — Medicare pays its fee schedule regardless of the charge.

What is CPT code 84133?

Urine potassium level. It was billed 93,597 times to 70,368 Medicare beneficiaries by 119 providers in 2024.

Which specialty bills 84133 most?

Clinical Laboratory, with 92,994 services from 103 clinicians. Next are Nephrology, Urology, Physician Assistant.

CPT 84133

Urine potassium level

$4.64Medicare-allowed amount per service, averaged across 93,597 services

Providers submitted

$26.82

Asking price, not received

Medicare allowed

$4.64

The fee schedule figure

Medicare paid

$4.64

Balance is patient coinsurance

Providers submitted an average of $26.82 for this code and Medicare allowed $4.64 — 5.8× 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 $4.64 (100%); the rest is the patient’s coinsurance and deductible.

Services: 93,597
Beneficiaries: 70,368
Providers billing it: 119
Total allowed: $434,290

What Medicare pays for CPT 84133

Across 93,597 services billed by 119 providers to 70,368 beneficiaries, Medicare allowed an average of $4.64 per service. That is 1.3 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 84133

Specialty	Services	Beneficiaries	Avg allowed	Providers
Clinical Laboratory	92,994	69,908	$4.64	103
Nephrology	415	350	$4.60	10
Urology	94	46	$4.54	3
Physician Assistant	80	51	$4.64	2
Internal Medicine	14	13	$4.64	1

84133 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	55,131	$4.64	$4.64	2
California	17,653	$4.64	$4.64	16
Florida	3,462	$4.64	$4.64	9
New Jersey	3,154	$4.64	$4.64	6
Texas	2,426	$4.63	$4.64	9
Oklahoma	1,741	$4.64	$4.64	4
New York	1,453	$4.63	$4.64	7
Minnesota	1,307	$4.63	$4.64	6
Arizona	1,230	$4.63	$4.64	3
Kansas	1,097	$4.64	$4.64	4
North Carolina	993	$4.64	$4.64	2
Alabama	452	$4.63	$4.64	5
Wisconsin	395	$4.60	$4.64	4
Tennessee	393	$4.61	$4.64	4
Georgia	379	$4.64	$4.64	2
Pennsylvania	320	$4.64	$4.64	3
Ohio	316	$4.60	$4.64	3
Massachusetts	296	$4.64	$4.64	2
Washington	220	$4.59	$4.64	4
Hawaii	192	$4.63	$4.64	2
Nevada	160	$4.64	$4.64	1
Maryland	154	$4.62	$4.64	3
Oregon	135	$4.64	$4.64	3
Michigan	111	$4.64	$4.64	4
Colorado	100	$4.60	$4.64	2
Virginia	90	$4.64	$4.64	3
West Virginia	71	$4.64	$4.64	1
Indiana	47	$4.64	$4.64	1
New Mexico	45	$4.64	$4.64	1
Rhode Island	31	$4.64	$4.64	1
Utah	26	$4.52	$4.64	1
Iowa	17	$4.64	$4.64	1

Related codes

84153Psa (prostate specific antigen) measurement$17.98
84100Phosphate level$4.63
84156Total protein level$3.59
84165Protein measurement$13.51
84155Total protein level$3.55
84154Psa (prostate specific antigen) measurement$18.00
84132Blood potassium level$4.63
84166Protein measurement$17.39
84144Progesterone (reproductive hormone) level$20.40
84146Prolactin (milk producing hormone) level$18.95
84134Prealbumin (protein) level$14.28
84105Urine phosphate level$5.66

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.