Electrolyte panel at Mercy Rehabilitation Hospital St Louis

14561 N Outer 40 Rd, Chesterfield, MO · Mercy · · NPI 1811048614

Source: hospital's published price file ↗ · Published Mar 16, 2026 · Ingested Sep 8, 2026

not published by hospital

Cash price

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Discounted cash price

What a hospital charges a self-pay patient who pays directly, without going through insurance — usually well below the gross charge.

Example: A CT scan has a $3,200 gross charge but an $850 discounted cash price. Ask for it by name when scheduling — hospitals don't always advertise it up front.

Full explanation →

What you pay up front if you don't use insurance.

not published by hospital

Gross charge

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Gross charge (chargemaster price)

The hospital's full, undiscounted list price — pulled from its internal "chargemaster" price list. Almost no one actually pays this.

Example: A chest X-ray has a gross charge of $1,450. The same hospital's discounted cash price for the same X-ray is $180 — the gross charge mostly anchors negotiations, not what patients pay.

Full explanation →

The hospital's undiscounted list price — almost no one pays this.

$259.27 with Devoted Health vs $259.27 with UHC Medicare — same scan, same building. Share

Negotiated rates by payer
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Negotiated rate

The price a specific insurance plan agreed to pay the hospital for a service — it varies by insurer, and even by plan within the same insurer.

Example: The same knee MRI has a negotiated rate of $904 with one insurer's PPO plan and $1,509 with another's — identical hospital, identical scan.

Full explanation →

Payer
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Payer

The insurance company footing the bill — Aetna, UnitedHealthcare, Medicare, and so on.

Example: "Blue Cross Blue Shield" is the payer. Its negotiated rate for an MRI might be $904, while a different payer's negotiated rate for the same scan is $1,509.

Full explanation →
Plan
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Plan

The specific product an insurer sells — e.g. "Blue Cross PPO 500" — which sets your deductible, coinsurance and negotiated rates.

Example: Two people both insured by Aetna can owe very different amounts for the same MRI: $50 with an HMO plan's flat copay, or the full $1,200 toward a high-deductible PPO plan's unmet deductible.

Full explanation →
Negotiated rate vs. cash
Devoted Health Devoted Health $259.27
Wellcare Wellcare $259.27
Medica Medica $259.27
Tricare Tricare $259.27
Ambetter Ambetter $259.27
Cigna Cigna $259.27
UMR CPD UMR CPD $259.27
Aetna Medicare Aetna Medicare $259.27
Aetna/ Managed Choice POS Elect Choice and PPO Products Aetna/ Managed Choice POS Elect Choice and PPO Products $259.27
Aetna/Commercial Product Aetna/Commercial Product $259.27
Anthem Alliance Anthem Alliance $259.27
Anthem Blue Access Anthem Blue Access $259.27
Anthem Blue Access Choice Anthem Blue Access Choice $259.27
Anthem Blue Preferred Anthem Blue Preferred $259.27
Anthem Medicare Anthem Medicare $259.27
Anthem Pathway Anthem Pathway $259.27
Cigna Medicare Advantage Cigna Medicare Advantage $259.27
Cigna PPO Cigna PPO $259.27
Essence Essence $259.27
Healthlink HMO Healthlink HMO $259.27
Healthlink PPO Healthlink PPO $259.27
Healthy Blue (Missouri Care) Healthy Blue (Missouri Care) $259.27
HomeState Health Plan HomeState Health Plan $259.27
Humana Gold Humana Gold $259.27
Medicaid MO Medicaid MO $259.27
Meritain Health CPD Meritain Health CPD $259.27
Meritain Health PPO CPD Meritain Health PPO CPD $259.27
Starmark CPD Starmark CPD $259.27
UHC All Payer UHC All Payer $259.27
UHC Exchange UHC Exchange $259.27
UHC Medicaid UHC Medicaid $259.27
UHC Medicare UHC Medicare $259.27

Visitor-reported prices

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Electrolyte panel at other Missouri hospitals

Hospital City Cash price Negotiated range
Mercy Hospital Aurora Aurora $104.00 $6.00 – $9.72
Mercy Hospital Lincoln Troy $109.85 $7.01 – $9.94
Mercy Hospital Carthage Carthage $49.40 $6.00 – $25.96
Mercy Hospital Southeast Cape Girardeau $100.10 $6.31 – $25.18
Mercy Hospital Stoddard Dexter $85.15 $6.31 – $24.54
Mercy Orthopedic Hospital Springfield Ozark $89.70 $5.34 – $41.03
Mercy Primary Care - Bernie Bernie $24.00 $2.94 – $15.45

All Missouri hospitals for this procedure →