CMS Price Transparency Data

Blood test, potassium

Facility: Northwestern Medicine Central Dupage Hospital

Billing Code: 84132 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 84132
Insurance Median: $42
Cash Discount Price: $48
vs. Medicare Baseline: 8.82x Medicare

The contracted insurance negotiated median rate for a Blood test, potassium at Northwestern Medicine Central Dupage Hospital is $42. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $48. Compared to the federal Medicare reimbursement reference rate of $4.76, this hospital’s rate is 8.82x the Medicare baseline. Located in 25 North Winfield Road, Winfield, IL.

Cash / Self-Pay

$48

Average discount available for prompt cash payment at this facility.

Insurance Median

$42

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: $48 (1008%)

Insurance Median: $42 (882%)

Cash: $48 (1008% of Medicare)

Ins. Median: $42 (882% 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.

Elevated Commercial Rate Alert (Value-Gap)

The negotiated rate at this facility is 882% of the Medicare baseline (a markup of 782%). Patients with high-deductible plans or out-of-network benefits may face excessive out-of-pocket costs.

Consult Patient Advocate

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	$4 - $143	84%
Countycare Il Cook Co [1607]	$4 - $10	84%
Medicaid / KanCare	$4 - $10	84%
Aetna	$8 - $50	168%
Carelon Behavioral Health [159]	$30 - $72	630%
Health'S Finest Network [126]	$30 - $130	630%
Multiplan/Phcs [142]	$34 - $143	714%
Dreyer Med Ipa Advocate [1409]	$35 - $86	735%
Humana	$35 - $143	735%
Magellan Behavioral Hlth [136]	$35 - $86	735%
Healthlink [125]	$37 - $90	777%
Choicecare [177]	$45 - $110	945%
First Health Plan [6034]	$45 - $110	945%
Cigna	$47 - $114	987%
Compsych [112]	$47 - $114	987%
UnitedHealthcare	$59 - $143	1239%

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 $48.
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 Northwestern Medicine Central Dupage Hospital 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.