Electrolyte panel at SSM Health St. Joseph Hospital - St. Charles

300 1St Capitol Dr, Saint Charles, MO · SSM Health · · NPI 1467521146

Source: hospital's published price file ↗ · Published Apr 1, 2026 · Ingested Sep 10, 2026

$99.55

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.

$181.00

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.

$7.01 with UnitedHealthCare vs $28.92 with Healthlink — 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
UnitedHealthCare Options PPO $7.01 ↓ -93%
Oscar Exchange $7.01 ↓ -93%
UnitedHealthCare St. Louis University Employee $7.01 ↓ -93%
UnitedHealthCare All Commercial Plans $7.01 ↓ -93%
Aetna Gold Advantage Medicare Managed Care Plan $7.08 ↓ -93%
UnitedHealthCare Medicare Managed Care Plan $7.11 ↓ -93%
BCBS Anthem Medicare Managed Care Plan $7.12 ↓ -93%
Humana Medicare Managed Care Plan $7.13 ↓ -93%
Aetna Advantra Medicare Managed Care Plan $7.26 ↓ -93%
BCBS Anthem Pathway Exchange $9.97 ↓ -90%
BCBS Anthem Blue Access Choice PPO $10.25 ↓ -90%
BCBS Anthem Blue Preferred HMO/POS $10.30 ↓ -90%
BCBS Anthem Blue Access PPO $11.11 ↓ -89%
Cigna OAP Other Commercial Plan $12.01 ↓ -88%
Healthlink HMO $28.92 ↓ -71%
Healthlink Employers Choice All Commercial Plans $28.92 ↓ -71%

Visitor-reported prices

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Electrolyte panel at other Missouri hospitals

Hospital City Cash price Negotiated range
SSM Health St. Joseph Hospital - Lake Saint Louis Lake Saint Louis $99.55 $7.01 – $28.92
SSM Health DePaul Hospital - St. Louis Bridgeton $99.55 $7.01 – $28.92
SSM Health Saint Louis University Hospital Saint Louis $77.00 $6.87 – $14.98
SSM Health St. Joseph Hospital- Wentzville Wentzville $99.55 $7.01 – $28.92
SSM Health St. Mary's Hospital - St. Louis Richmond Heights $99.55 $7.01 – $28.92
SSM Health St. Mary's Hospital - Jefferson City Jefferson City $52.25 $6.31 – $12.62
Mercy Hospital Aurora Aurora $104.00 $6.00 – $9.72
Mercy Hospital Lincoln Troy $109.85 $7.01 – $9.94

All Missouri hospitals for this procedure →