Assay of corticosterone at Arroyo Grande Hospital

1400 E Church St, Santa Maria, CA · CommonSpirit Health · · NPI 1760510937

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

$11.11

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.

$25.94

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.

$12.97 with Western Growers vs $58.03 with Cigna — 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
Western Growers Commercial|All Plans $12.97 ↑ +17%
Blue Shield CA Commercial|Exchange $16.35 ↑ +47%
Kaiser Commercial|All Plans $16.35 ↑ +47%
First Health Commercial|All Plans $21.79 ↑ +96%
Humana Medicare|All Plans $22.52 ↑ +103%
Aetna Medicare|All Plans $22.52 ↑ +103%
United Medicare|All Plans $22.52 ↑ +103%
Kaiser Medicare|All Plans $22.52 ↑ +103%
BCBS - Anthem Medicare|All Plans $22.52 ↑ +103%
Alignment Medicare|All Plans $22.52 ↑ +103%
MHS Hospice Commercial|All Plans $22.52 ↑ +103%
Scan Health Plan Medicare|All Plans $22.52 ↑ +103%
Blue Shield CA Commercial|FFS $22.83 ↑ +105%
Healthsmart Commercial|All Plans $23.87 ↑ +115%
BCBS - Anthem Commercial|Non-MCS $25.17 ↑ +127%
MultiPlan Commercial|All Plans $25.43 ↑ +129%
CenCal Medicaid|< 21 $25.83 ↑ +132%
CenCal Medicaid|> 21 $25.83 ↑ +132%
United Commercial|Options PPO $25.94 ↑ +133%
Aetna Commercial|All Other Plans $25.94 ↑ +133%
Partnership Health Plan Medicaid|< 21 $25.94 ↑ +133%
BCBS - Anthem Commercial|MCS $25.94 ↑ +133%
Partnership Health Plan Medicaid|> 21 $25.94 ↑ +133%
Aetna Commercial|HMO $25.94 ↑ +133%
Aetna Commercial|PPO $25.94 ↑ +133%
United Commercial|All Other Plans $25.94 ↑ +133%
United Commercial|Non-Options PPO $25.94 ↑ +133%
United Commercial|HMO $27.02 ↑ +143%
Health Net Medicaid|< 21 $31.91 ↑ +187%
Health Net Medicaid|> 21 $31.91 ↑ +187%
Cigna Commercial|PPO $58.03 ↑ +422%
Cigna Commercial|All Other Plans $58.03 ↑ +422%

Visitor-reported prices

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Assay of corticosterone at other California hospitals

Hospital City Cash price Negotiated range
Banner Lassen Medical Center Susanville $20.66 $4.50 – $33.03
French Hospital San Luis Obispo $10.17 $7.01 – $68.22
Petaluma Valley Hospital Petaluma not published $22.07 – $177.79
Queen of The Valley Medical Center Napa not published $22.52 – $224.68
Providence St Joseph Hospital Eureka Eureka not published $22.52 – $254.79
Healdsburg Hospital Healdsburg not published $22.52 – $101.64
Redwood Memorial Hospital Fortuna not published $255.38 – $255.38
Santa Rosa Memorial Hospital Santa Rosa not published $22.07 – $191.15

All California hospitals for this procedure →