Infectious agent antigen immunoassay ql/sq multi step hepatitis b surface agn 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

$87.92

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.

$132.00

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.

$10.33 with Health Net vs $25.32 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 $10.33 ↓ -88%
Humana Medicare|All Plans $10.33 ↓ -88%
Care 1st Medicare|All Plans $10.33 ↓ -88%
Scan Health Plan Medicare|All Plans $10.33 ↓ -88%
Aetna Medicare|All Plans $10.33 ↓ -88%
Blue Shield CA Medicare|All Plans $10.33 ↓ -88%
BCBS - Anthem Medicare|All Plans $10.33 ↓ -88%
Kaiser Medicare|All Plans $10.33 ↓ -88%
United Medicare|All Plans $10.33 ↓ -88%
Health Plan of San Joaquin Medicaid|All Plans $13.08 ↓ -85%
Health Net Medicaid|All Plans $13.08 ↓ -85%
Kaiser Medicaid|All Plans $13.08 ↓ -85%
BCBS - Anthem Medicaid|All Plans $13.08 ↓ -85%
California Health & Wellness Medicaid|All Plans $13.08 ↓ -85%
BCBS - Anthem Commercial|Exchange $13.99 ↓ -84%
United Commercial|Select $15.03 ↓ -83%
Blue Shield CA Commercial|PPO $16.54 ↓ -81%
Blue Shield CA Commercial|HMO $16.54 ↓ -81%
Blue Shield CA Commercial|Exchange $16.54 ↓ -81%
United Commercial|Choice $17.24 ↓ -80%
BCBS - Anthem Commercial|All Other Plans $17.93 ↓ -80%
Health Net Commercial|All Plans $19.30 ↓ -78%
First Health Commercial|All Plans $19.38 ↓ -78%
United Commercial|HMO $20.26 ↓ -77%
Aetna Commercial|All Other Plans $21.11 ↓ -76%
Aetna Commercial|HMO $21.11 ↓ -76%
Aetna Commercial|PPO $21.11 ↓ -76%
Kaiser Commercial|All Plans $21.96 ↓ -75%
Cigna Commercial|PPO $23.12 ↓ -74%
Cigna Commercial|All Other Plans $23.12 ↓ -74%
Multiplan Commercial|All Plans $25.32 ↓ -71%

Visitor-reported prices

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Infectious agent antigen immunoassay ql/sq multi step hepatitis b surface agn at other California hospitals

Hospital City Cash price Negotiated range
St. John's Camarillo Hospital Camarillo $79.72 $10.33 – $32.23
Banner Lassen Medical Center Susanville $5.02 $0.82 – $15.05
Petaluma Valley Hospital Petaluma $236.64 $10.12 – $81.56
Arroyo Grande Hospital Santa Maria $72.34 $2.50 – $26.60
French Hospital San Luis Obispo $66.25 $1.35 – $31.27
Mercy Hospitals – Bakersfield Bakersfield $81.25 $2.50 – $29.66
Bakersfield Memorial Hospital Bakersfield $80.38 $2.50 – $29.66
Queen of The Valley Medical Center Napa $652.80 $10.33 – $103.07

All California hospitals for this procedure →