CMS Price Transparency Data

Blood test, magnesium

Facility: University of Louisville Hospital

Billing Code: 83735 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 83735
Insurance Median: $12
Cash Discount Price: $10
vs. Medicare Baseline: 1.79x Medicare

The contracted insurance negotiated median rate for a Blood test, magnesium at University of Louisville Hospital is $12. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $10. Compared to the federal Medicare reimbursement reference rate of $6.7, this hospital’s rate is 1.79x the Medicare baseline. Located in 530 South Jackson Street, Louisville, KY.

Cash / Self-Pay

$10

Average discount available for prompt cash payment at this facility.

Insurance Median

$12

Median negotiated contract rate across all mapped commercial carriers.

Medicare Reference Rate

$6.7

Standard federal government reimbursement rate for this code.

Visual Cost Comparison vs. Medicare

Medicare Reference Baseline: $6.7 (100%)

Cash / Self-Pay: $10 (149%)

Insurance Median: $12 (179%)

Cash: $10 (149% of Medicare)

Ins. Median: $12 (179% of Medicare)

Understanding this gauge: We use the federal Medicare rate of $6.7 as the cost baseline. Rates below the baseline represent excellent value. In-network commercial rates commonly hover around 150% - 250% of Medicare, while rates exceeding 300% are elevated. Hover over the green and blue markers to view detailed calculations.

Out-of-Pocket Cost Estimator

Estimate whether it is more economical to use your insurance or pay the upfront self-pay cash rate.

Billing Status

Remaining Deductible ($)

Your Coinsurance Rate (%)

Input your details and click calculate to compare out-of-pocket costs.

Commercial Insurance Negotiated Rates

Negotiated contract ranges established by major commercial carriers at this facility.

Carrier / Plan Group	Contract Rate Range	vs. Medicare Reference
Aetna	$6 - $7	90%
Blue Cross Blue Shield	$6 - $42	90%
Humana	$6 - $7	90%
Communicare	$7	104%
Devoted	$7 - $13	104%
Essence Health	$7	104%
Passport	$7 - $21	104%
Senior Care Community Of Ky	$7	104%
Signature	$7 - $21	104%
UnitedHealthcare	$7 - $20	104%
Va Ccn	$7	104%
Velocity	$8 - $41	119%
Wellcare	$8 - $9	119%
Key Benefit Administrators	$9	134%
Cigna	$11	164%
Prime Group Health	$12 - $36	179%
Cshn	$27 - $42	403%
Multiplan	$28 - $38	418%
Encore	$29	433%
Health Smart	$32	478%
Omca	$40	597%
Corvel	$42	627%
National Comp Care	$42	627%

Self-Pay Upfront Cash Action Plan

Request a "Self-Pay classification" with the billing desk before receiving care.
Ask for a written "Prompt-Pay Discount" agreement quoting the price of $10.
Request and sign a "Waiver of Insurance Submission" to prevent automatic billing.
Verify CPT Code matches exactly: 83735.

Insurance In-Network Protection Plan

Contact your insurance company to confirm University of Louisville Hospital is fully in-network.
Ask your insurer if "Prior Authorization" is required for CPT code 83735.
Confirm the specific physician or imaging center is also in-network (not just the hospital building).
Audit your Explanation of Benefits (EOB) against the final itemized hospital invoice.