CMS Price Transparency Data

Blood test, potassium

Facility: Ascension Columbia St Marys Hospital Milwaukee

Billing Code: 84132 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 84132
Insurance Median: $9
Cash Discount Price: $38
vs. Medicare Baseline: 1.89x Medicare

The contracted insurance negotiated median rate for a Blood test, potassium at Ascension Columbia St Marys Hospital Milwaukee is $9. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $38. Compared to the federal Medicare reimbursement reference rate of $4.76, this hospital’s rate is 1.89x the Medicare baseline. Located in 2323 N Lake Dr, Milwaukee, WI.

Cash / Self-Pay

$38

Average discount available for prompt cash payment at this facility.

Insurance Median

Median negotiated contract rate across all mapped commercial carriers.

Medicare Reference Rate

$4.76

Standard federal government reimbursement rate for this code.

Visual Cost Comparison vs. Medicare

Medicare Reference Baseline: $4.76 (100%)

Cash / Self-Pay: $38 (798%)

Insurance Median: $9 (189%)

Cash: $38 (798% of Medicare)

Ins. Median: $9 (189% of Medicare)

Understanding this gauge: We use the federal Medicare rate of $4.76 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
Blue Cross Blue Shield	$5 - $18	105%
Medicare (plans)	$5	105%
Veterans Administration	$5	105%
Cchp Marketplace	$6	126%
Humana	$6 - $9	126%
UnitedHealthcare	$7	147%
Network Health Plan	$8	168%
Molina Health Marketplace	$10	210%
Sehn C89	$11	231%
Alliance	$20 - $21	420%

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 $38.
Request and sign a "Waiver of Insurance Submission" to prevent automatic billing.
Verify CPT Code matches exactly: 84132.

Insurance In-Network Protection Plan

Contact your insurance company to confirm Ascension Columbia St Marys Hospital Milwaukee is fully in-network.
Ask your insurer if "Prior Authorization" is required for CPT code 84132.
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.