Ammonia at Mark Twain Medical Center
768 Mountain Ranch Rd, San Andreas, CA · CommonSpirit Health · · NPI 1508968819
$226.44
Cash price 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.
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What you pay up front if you don't use insurance.
$340.00
Gross charge 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.
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The hospital's undiscounted list price — almost no one pays this.
$14.57 with Health Net vs $246.96 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 →
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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 ?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 ?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 | $14.57 | ↓ -94% |
| Humana | Medicare|All Plans | $14.57 | ↓ -94% |
| Care 1st | Medicare|All Plans | $14.57 | ↓ -94% |
| Scan Health Plan | Medicare|All Plans | $14.57 | ↓ -94% |
| Aetna | Medicare|All Plans | $14.57 | ↓ -94% |
| Blue Shield CA | Medicare|All Plans | $14.57 | ↓ -94% |
| BCBS - Anthem | Medicare|All Plans | $14.57 | ↓ -94% |
| Kaiser | Medicare|All Plans | $14.57 | ↓ -94% |
| United | Medicare|All Plans | $14.57 | ↓ -94% |
| Health Plan of San Joaquin | Medicaid|All Plans | $18.58 | ↓ -92% |
| Health Net | Medicaid|All Plans | $18.58 | ↓ -92% |
| Kaiser | Medicaid|All Plans | $18.58 | ↓ -92% |
| BCBS - Anthem | Medicaid|All Plans | $18.58 | ↓ -92% |
| California Health & Wellness | Medicaid|All Plans | $18.58 | ↓ -92% |
| BCBS - Anthem | Commercial|Exchange | $154.68 | ↓ -32% |
| United | Commercial|Select | $171.11 | ↓ -24% |
| Blue Shield CA | Commercial|HMO | $182.20 | ↓ -20% |
| Blue Shield CA | Commercial|Exchange | $182.20 | ↓ -20% |
| Blue Shield CA | Commercial|PPO | $182.20 | ↓ -20% |
| First Health | Commercial|All Plans | $189.00 | ↓ -17% |
| United | Commercial|Choice | $196.06 | ↓ -13% |
| BCBS - Anthem | Commercial|All Other Plans | $198.30 | ↓ -12% |
| Health Net | Commercial|All Plans | $202.61 | ↓ -11% |
| Aetna | Commercial|HMO | $205.89 | ↓ -9% |
| Aetna | Commercial|All Other Plans | $205.89 | ↓ -9% |
| Aetna | Commercial|PPO | $205.89 | ↓ -9% |
| Kaiser | Commercial|All Plans | $214.20 | ↓ -5% |
| Cigna | Commercial|PPO | $225.54 | ↓ -0% |
| Cigna | Commercial|All Other Plans | $225.54 | ↓ -0% |
| United | Commercial|HMO | $231.34 | ↑ +2% |
| Multiplan | Commercial|All Plans | $246.96 | ↑ +9% |
Visitor-reported prices
Comments
Ammonia at other California hospitals
| Hospital | City | Cash price | Negotiated range |
|---|---|---|---|
| St. John's Camarillo Hospital | Camarillo | $222.95 | $14.57 – $45.46 |
| Banner Lassen Medical Center | Susanville | $40.69 | $2.91 – $42.68 |
| Petaluma Valley Hospital | Petaluma | $507.45 | $14.28 – $118.98 |
| Arroyo Grande Hospital | Santa Maria | $196.03 | $14.57 – $45.08 |
| French Hospital | San Luis Obispo | $179.54 | $12.42 – $45.08 |
| Mercy Hospitals – Bakersfield | Bakersfield | $249.32 | $4.17 – $41.87 |
| Bakersfield Memorial Hospital | Bakersfield | $246.26 | $4.17 – $41.87 |
| Queen of The Valley Medical Center | Napa | $486.03 | $14.57 – $150.36 |