Infectious agent antigen immunoassay ql/sq multi step clostridium difficile toxin at Mark Twain Medical Center

768 Mountain Ranch Rd, San Andreas, CA · CommonSpirit Health · · NPI 1508968819

Source: hospital's published price file ↗ · Published Feb 28, 2026 · Ingested Sep 10, 2026

$109.23

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.

$164.00

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.

$11.98 with Health Net vs $160.72 with Multiplan — 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
Health Net Medicare|All Plans $11.98 ↓ -89%
Humana Medicare|All Plans $11.98 ↓ -89%
Care 1st Medicare|All Plans $11.98 ↓ -89%
Scan Health Plan Medicare|All Plans $11.98 ↓ -89%
Aetna Medicare|All Plans $11.98 ↓ -89%
Blue Shield CA Medicare|All Plans $11.98 ↓ -89%
BCBS - Anthem Medicare|All Plans $11.98 ↓ -89%
Kaiser Medicare|All Plans $11.98 ↓ -89%
United Medicare|All Plans $11.98 ↓ -89%
Health Plan of San Joaquin Medicaid|All Plans $12.03 ↓ -89%
Health Net Medicaid|All Plans $12.03 ↓ -89%
Kaiser Medicaid|All Plans $12.03 ↓ -89%
BCBS - Anthem Medicaid|All Plans $12.03 ↓ -89%
California Health & Wellness Medicaid|All Plans $12.03 ↓ -89%
BCBS - Anthem Commercial|Exchange $88.78 ↓ -19%
United Commercial|Select $95.39 ↓ -13%
Blue Shield CA Commercial|PPO $104.96 ↓ -4%
Blue Shield CA Commercial|HMO $104.96 ↓ -4%
Blue Shield CA Commercial|Exchange $104.96 ↓ -4%
United Commercial|Choice $109.46 ↑ +0%
BCBS - Anthem Commercial|All Other Plans $113.82 ↑ +4%
Health Net Commercial|All Plans $122.51 ↑ +12%
First Health Commercial|All Plans $123.00 ↑ +13%
United Commercial|HMO $128.60 ↑ +18%
Aetna Commercial|All Other Plans $133.99 ↑ +23%
Aetna Commercial|HMO $133.99 ↑ +23%
Aetna Commercial|PPO $133.99 ↑ +23%
Kaiser Commercial|All Plans $139.40 ↑ +28%
Cigna Commercial|PPO $146.78 ↑ +34%
Cigna Commercial|All Other Plans $146.78 ↑ +34%
Multiplan Commercial|All Plans $160.72 ↑ +47%

Visitor-reported prices

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Infectious agent antigen immunoassay ql/sq multi step clostridium difficile toxin at other California hospitals

Hospital City Cash price Negotiated range
St. John's Camarillo Hospital Camarillo $63.08 $11.98 – $112.32
Banner Lassen Medical Center Susanville $71.42 $2.40 – $124.16
Petaluma Valley Hospital Petaluma $227.46 $11.74 – $73.37
Arroyo Grande Hospital Santa Maria $146.81 $8.58 – $30.88
French Hospital San Luis Obispo $134.46 $4.64 – $36.30
Mercy Hospitals – Bakersfield Bakersfield $108.34 $11.79 – $79.20
Bakersfield Memorial Hospital Bakersfield $107.17 $11.79 – $87.69
Queen of The Valley Medical Center Napa $371.28 $11.98 – $92.72

All California hospitals for this procedure →