CMS Price Transparency Data

Blood test, magnesium

Facility: Marshfield Medical Center - Eau Claire

Billing Code: 83735 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 83735
Insurance Median: $54
Cash Discount Price: $59
vs. Medicare Baseline: 8.06x Medicare

The contracted insurance negotiated median rate for a Blood test, magnesium at Marshfield Medical Center - Eau Claire is $54. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $59. Compared to the federal Medicare reimbursement reference rate of $6.7, this hospital’s rate is 8.06x the Medicare baseline. Located in 2310 Craig Rd, Eau Claire, WI.

Cash / Self-Pay

$59

Average discount available for prompt cash payment at this facility.

Insurance Median

$54

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: $59 (881%)

Insurance Median: $54 (806%)

Cash: $59 (881% of Medicare)

Ins. Median: $54 (806% 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.

Elevated Commercial Rate Alert (Value-Gap)

The negotiated rate at this facility is 806% of the Medicare baseline (a markup of 706%). 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	$7 - $42	104%
Group Health Cooperative Of Eau Claire	$7 - $68	104%
Point Comfort Underwriters	$7	104%
Security Health Plan (Shp)	$7 - $46	104%
Veteran'S Administration (Va Ccn)	$7	104%
Managed Health Services	$8	119%
UnitedHealthcare	$23 - $62	343%
Family Health Center (Fhc)	$28 - $38	418%
Amish/Mennonite	$30 - $42	448%
Sanford Health Plan	$30 - $42	448%
The Alliance	$42 - $357	627%
Besse Forest Products	$47 - $64	701%
Molina Healthcare Of Wi	$47 - $64	701%
Rice Lake School District	$47 - $64	701%
Wps Health Insurance	$49 - $73	731%
Medica Of Wi	$51 - $72	761%
Cigna	$52 - $72	776%
Corvel	$52 - $72	776%
First Health	$52 - $72	776%
Health Partners	$52 - $72	776%
Healtheos By Multiplan Inc.	$52 - $72	776%
Three Rivers Provider Network (Trpn)	$52 - $72	776%
Coventry	$53 - $73	791%
Health Smart	$53 - $73	791%
Rising Medical Work Comp	$53 - $73	791%
Trilogy	$53 - $73	791%

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 $59.
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 Marshfield Medical Center - Eau Claire 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.