Assay myeloperoxidase 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

$29.31

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.

$68.46

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.

$15.13 with Partnership Health Plan vs $131.05 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
Partnership Health Plan Medicaid|< 21 $15.13 ↓ -48%
Partnership Health Plan Medicaid|> 21 $15.13 ↓ -48%
CenCal Medicaid|> 21 $15.13 ↓ -48%
CenCal Medicaid|< 21 $15.13 ↓ -48%
Health Net Medicaid|> 21 $22.89 ↓ -22%
Health Net Medicaid|< 21 $22.89 ↓ -22%
Western Growers Commercial|All Plans $28.75 ↓ -2%
Blue Shield CA Commercial|Exchange $36.23 ↑ +24%
Kaiser Commercial|All Plans $36.23 ↑ +24%
First Health Commercial|All Plans $48.30 ↑ +65%
Blue Shield CA Commercial|FFS $50.60 ↑ +73%
Humana Medicare|All Plans $50.86 ↑ +74%
Aetna Medicare|All Plans $50.86 ↑ +74%
United Medicare|All Plans $50.86 ↑ +74%
Kaiser Medicare|All Plans $50.86 ↑ +74%
BCBS - Anthem Medicare|All Plans $50.86 ↑ +74%
Alignment Medicare|All Plans $50.86 ↑ +74%
MHS Hospice Commercial|All Plans $50.86 ↑ +74%
Scan Health Plan Medicare|All Plans $50.86 ↑ +74%
Healthsmart Commercial|All Plans $52.90 ↑ +80%
BCBS - Anthem Commercial|Non-MCS $55.78 ↑ +90%
MultiPlan Commercial|All Plans $56.35 ↑ +92%
Aetna Commercial|All Other Plans $57.50 ↑ +96%
Aetna Commercial|PPO $57.50 ↑ +96%
United Commercial|Non-Options PPO $57.50 ↑ +96%
Aetna Commercial|HMO $57.50 ↑ +96%
BCBS - Anthem Commercial|MCS $57.50 ↑ +96%
United Commercial|All Other Plans $57.50 ↑ +96%
United Commercial|Options PPO $57.50 ↑ +96%
United Commercial|HMO $61.03 ↑ +108%
Cigna Commercial|PPO $131.05 ↑ +347%
Cigna Commercial|All Other Plans $131.05 ↑ +347%

Visitor-reported prices

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Assay myeloperoxidase at other California hospitals

Hospital City Cash price Negotiated range
French Hospital San Luis Obispo $26.84 $15.13 – $154.06
Mercy Hospitals – Bakersfield Bakersfield $20.41 $15.13 – $146.16
Petaluma Valley Hospital Petaluma not published $49.84 – $101.72
Queen of The Valley Medical Center Napa not published $50.86 – $127.51
Providence St Joseph Hospital Eureka Eureka not published $50.86 – $241.00
Healdsburg Hospital Healdsburg not published $50.86 – $136.00
Redwood Memorial Hospital Fortuna not published $241.57 – $241.57
Santa Rosa Memorial Hospital Santa Rosa not published $49.84 – $108.48

All California hospitals for this procedure →