Mayo thyroglobulin 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

$39.96

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.

$60.00

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.

$9.00 with BCBS - Anthem vs $16.61 with Kaiser — 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
BCBS - Anthem Commercial|Exchange $9.00 ↓ -77%
United Commercial|Select $9.67 ↓ -76%
Blue Shield CA Commercial|Exchange $10.64 ↓ -73%
Blue Shield CA Commercial|PPO $10.64 ↓ -73%
Blue Shield CA Commercial|HMO $10.64 ↓ -73%
United Commercial|Choice $11.09 ↓ -72%
BCBS - Anthem Commercial|All Other Plans $11.53 ↓ -71%
Health Net Commercial|All Plans $12.41 ↓ -69%
First Health Commercial|All Plans $12.46 ↓ -69%
United Commercial|HMO $13.03 ↓ -67%
Aetna Commercial|HMO $13.58 ↓ -66%
Aetna Commercial|PPO $13.58 ↓ -66%
Aetna Commercial|All Other Plans $13.58 ↓ -66%
Kaiser Commercial|All Plans $14.12 ↓ -65%
Cigna Commercial|All Other Plans $14.87 ↓ -63%
Cigna Commercial|PPO $14.87 ↓ -63%
Care 1st Medicare|All Plans $16.06 ↓ -60%
Humana Medicare|All Plans $16.06 ↓ -60%
Aetna Medicare|All Plans $16.06 ↓ -60%
United Medicare|All Plans $16.06 ↓ -60%
Health Net Medicare|All Plans $16.06 ↓ -60%
Kaiser Medicare|All Plans $16.06 ↓ -60%
BCBS - Anthem Medicare|All Plans $16.06 ↓ -60%
Blue Shield CA Medicare|All Plans $16.06 ↓ -60%
Scan Health Plan Medicare|All Plans $16.06 ↓ -60%
Multiplan Commercial|All Plans $16.28 ↓ -59%
California Health & Wellness Medicaid|All Plans $16.61 ↓ -58%
Health Net Medicaid|All Plans $16.61 ↓ -58%
Health Plan of San Joaquin Medicaid|All Plans $16.61 ↓ -58%
BCBS - Anthem Medicaid|All Plans $16.61 ↓ -58%
Kaiser Medicaid|All Plans $16.61 ↓ -58%

Visitor-reported prices

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Mayo thyroglobulin at other California hospitals

Hospital City Cash price Negotiated range
St. John's Camarillo Hospital Camarillo $26.28 $4.49 – $42.62
Banner Lassen Medical Center Susanville $20.03 $2.87 – $23.56
Petaluma Valley Hospital Petaluma $16.96 $15.74 – $133.71
Arroyo Grande Hospital Santa Maria $25.68 $8.31 – $41.38
French Hospital San Luis Obispo $23.52 $4.49 – $48.65
Mercy Hospitals – Bakersfield Bakersfield $22.26 $8.31 – $46.16
Bakersfield Memorial Hospital Bakersfield $22.02 $8.31 – $46.16
Queen of The Valley Medical Center Napa $16.96 $16.06 – $168.98

All California hospitals for this procedure →