CMS Price Transparency Data

Blood test, magnesium

Facility: Marshfield Medical Center

Billing Code: 83735 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 83735
Insurance Median: $49
Cash Discount Price: $52
vs. Medicare Baseline: 7.31x Medicare

The contracted insurance negotiated median rate for a Blood test, magnesium at Marshfield Medical Center is $49. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $52. Compared to the federal Medicare reimbursement reference rate of $6.7, this hospital’s rate is 7.31x the Medicare baseline. Located in 611 St Joseph Ave, Marshfield, WI.

Cash / Self-Pay

$52

Average discount available for prompt cash payment at this facility.

Insurance Median

$49

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: $52 (776%)

Insurance Median: $49 (731%)

Cash: $52 (776% of Medicare)

Ins. Median: $49 (731% 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 731% of the Medicare baseline (a markup of 631%). 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 - $70	104%
Security Health Plan (Shp)	$7 - $46	104%
Veteran'S Administration (Va Ccn)	$7	104%
Managed Health Services	$8	119%
Family Health Center (Fhc)	$12 - $38	179%
Amish/Mennonite	$13 - $42	194%
Sanford Health Plan	$13 - $42	194%
The Alliance	$16 - $63	239%
Besse Forest Products	$20 - $64	299%
Molina Healthcare Of Wi	$20 - $64	299%
Rice Lake School District	$20 - $64	299%
Trilogy	$21 - $73	313%
Wps Health Insurance	$21 - $73	313%
Cigna	$22 - $71	328%
Corvel	$22 - $72	328%
Coventry	$22 - $73	328%
First Health	$22 - $72	328%
Health Partners	$22 - $72	328%
Health Smart	$22 - $73	328%
Healtheos By Multiplan Inc.	$22 - $72	328%
Medica Of Wi	$22 - $72	328%
Three Rivers Provider Network (Trpn)	$22 - $72	328%
Rising Medical Work Comp	$23 - $73	343%
UnitedHealthcare	$23	343%

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 $52.
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 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.