CMS Price Transparency Data

Blood test, potassium

Facility: Martha's Vineyard Hospital Inc

Billing Code: 84132 (CPT)

Factual Cost Summary (Answer Capsule)

CPT Billing Code: 84132
Insurance Median: $63
Cash Discount Price: $68
vs. Medicare Baseline: 13.24x Medicare

The contracted insurance negotiated median rate for a Blood test, potassium at Martha's Vineyard Hospital Inc is $63. If you are paying out-of-pocket or uninsured, the self-pay cash discount rate is $68. Compared to the federal Medicare reimbursement reference rate of $4.76, this hospital’s rate is 13.24x the Medicare baseline. Located in One Hospital Road, First Fl, Wing 5, Po Box 1477, Oak Bluffs, MA.

Cash / Self-Pay

$68

Average discount available for prompt cash payment at this facility.

Insurance Median

$63

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: $68 (1429%)

Insurance Median: $63 (1324%)

Cash: $68 (1429% of Medicare)

Ins. Median: $63 (1324% 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 1324% of the Medicare baseline (a markup of 1224%). 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
Medicare (plans)	$45	945%
Mgb Health Plan [150001]	$45	945%
UnitedHealthcare	$45 - $83	945%
Blue Cross Blue Shield	$63	1324%
Harvard Pilgrim [120001]	$71	1492%

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 $68.
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 Martha's Vineyard Hospital Inc 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.