Mayo organic acid methylmalonic single quantitative 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

$14.78

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.

$22.18

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.

$8.12 with BCBS - Anthem vs $15.00 with Health Net — 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 $8.12 ↓ -45%
United Commercial|Select $8.73 ↓ -41%
Blue Shield CA Commercial|HMO $9.60 ↓ -35%
Blue Shield CA Commercial|Exchange $9.60 ↓ -35%
Blue Shield CA Commercial|PPO $9.60 ↓ -35%
United Commercial|Choice $10.02 ↓ -32%
BCBS - Anthem Commercial|All Other Plans $10.41 ↓ -30%
Health Net Commercial|All Plans $11.21 ↓ -24%
First Health Commercial|All Plans $11.25 ↓ -24%
United Commercial|HMO $11.77 ↓ -20%
Aetna Commercial|HMO $12.26 ↓ -17%
Aetna Commercial|PPO $12.26 ↓ -17%
Aetna Commercial|All Other Plans $12.26 ↓ -17%
Kaiser Commercial|All Plans $12.75 ↓ -14%
Cigna Commercial|All Other Plans $13.43 ↓ -9%
Cigna Commercial|PPO $13.43 ↓ -9%
Health Plan of San Joaquin Medicaid|All Plans $14.68 ↓ -1%
Health Net Medicaid|All Plans $14.68 ↓ -1%
Kaiser Medicaid|All Plans $14.68 ↓ -1%
BCBS - Anthem Medicaid|All Plans $14.68 ↓ -1%
California Health & Wellness Medicaid|All Plans $14.68 ↓ -1%
Multiplan Commercial|All Plans $14.70 ↓ -1%
BCBS - Anthem Medicare|All Plans $15.00 ↑ +1%
United Medicare|All Plans $15.00 ↑ +1%
Blue Shield CA Medicare|All Plans $15.00 ↑ +1%
Aetna Medicare|All Plans $15.00 ↑ +1%
Humana Medicare|All Plans $15.00 ↑ +1%
Scan Health Plan Medicare|All Plans $15.00 ↑ +1%
Kaiser Medicare|All Plans $15.00 ↑ +1%
Care 1st Medicare|All Plans $15.00 ↑ +1%
Health Net Medicare|All Plans $15.00 ↑ +1%

Visitor-reported prices

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Mayo organic acid methylmalonic single quantitative at other California hospitals

Hospital City Cash price Negotiated range
St. John's Camarillo Hospital Camarillo $6.57 $4.05 – $56.29
Banner Lassen Medical Center Susanville $8.76 $4.24 – $24.22
Petaluma Valley Hospital Petaluma $101.36 $20.79 – $134.31
Arroyo Grande Hospital Santa Maria $9.50 $7.50 – $54.66
French Hospital San Luis Obispo $8.70 $4.05 – $64.26
Mercy Hospitals – Bakersfield Bakersfield $63.07 $7.50 – $60.97
Bakersfield Memorial Hospital Bakersfield $62.39 $7.50 – $60.97
Queen of The Valley Medical Center Napa $101.36 $21.21 – $169.74

All California hospitals for this procedure →