Assay of tyrosine at SSM Health St. Joseph Hospital- Wentzville

500 Medical Drive, Wentzville, MO · SSM Health · · NPI 1851833305

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

$56.10

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.

$102.00

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.

$10.63 with UnitedHealthCare vs $42.89 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 St. Louis University Employee $10.63 ↓ -81%
UnitedHealthCare Options PPO $10.63 ↓ -81%
UnitedHealthCare All Commercial Plans $10.63 ↓ -81%
BCBS Anthem Pathway Exchange $14.79 ↓ -74%
BCBS Anthem Blue Access Choice PPO $15.20 ↓ -73%
BCBS Anthem Blue Preferred HMO/POS $15.27 ↓ -73%
BCBS Anthem Blue Access PPO $16.47 ↓ -71%
Cigna OAP Other Commercial Plan $17.72 ↓ -68%
Healthlink HMO $42.89 ↓ -24%
Healthlink Employers Choice All Commercial Plans $42.89 ↓ -24%

Visitor-reported prices

visitor-reported
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Assay of tyrosine at other Missouri hospitals

Hospital City Cash price Negotiated range
SSM Health St. Joseph Hospital - Lake Saint Louis Lake Saint Louis $56.10 $10.63 – $42.89
SSM Health DePaul Hospital - St. Louis Bridgeton $56.10 $10.63 – $42.89
SSM Health Saint Louis University Hospital Saint Louis $242.55 $10.42 – $22.21
SSM Health St. Joseph Hospital - St. Charles Saint Charles $56.10 $10.63 – $42.89
SSM Health St. Mary's Hospital - St. Louis Richmond Heights $56.10 $10.63 – $42.89
SSM Health St. Mary's Hospital - Jefferson City Jefferson City $221.65 $9.57 – $19.13
Mercy Hospital Aurora Aurora $69.55 $9.04 – $14.74
Mercy Hospital Lincoln Troy $73.45 $10.63 – $14.74

All Missouri hospitals for this procedure →