Test urine for porphyrins at CENTENNIAL MEDICAL CENTER AT ASHLAND CITY

313 NORTH MAIN STREET, Ashland City, TN · Tristarhealth · · NPI 1265487193

Source: hospital's published price file ↗ · Published Mar 1, 2026 · Ingested Sep 16, 2026

not published by hospital

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.

not published by hospital

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.

$6.01 with Wellpoint vs $53.44 with Humana — 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
Wellpoint MGMCD $6.01
Aetna NewBusiness $10.62
Aetna COMM $10.62
BCBS NetworkP $11.75
Bright Health HIX $13.36
United AllPayerAppendix $13.36
United CorePayer $13.36
Humana ChoicecareMGMCR $13.36
Bright Health SmallGroup $13.36
United HeritageSelect $13.36
Sarah Cannon Research COMM $13.36
WellCare MCR $13.76
Zing MGMCR $13.76
Ambetter Select $13.89
American Health Advantage MCRPOS $14.03
United VACCN $14.03
American Health Advantage MCRHMO $14.03
Devoted Health Plan MCR $14.03
American Health Advantage MCRPPO $14.03
American Health Advantage MCRSNP $14.03
American Health Advantage MCRPFFS $14.03
Evergreen HMO MCR $14.03
Healthspring MCRPPO $14.03
Healthspring MCRHMONonTMN $14.03
Healthspring MCRHMOTMN $14.03
Aetna MGMCRHMO $14.17
Aetna MGMCRPPO $14.17
Aetna MGMCRSNP $14.17
Ambetter CORE $14.43
ATRIO Golden Times MCR $14.70
Signature Advantage MCR $14.87
Bright Health MCRNarrow $16.13
BCBS TENNCARE $16.50
BCBS COVERKIDS $17.82
Prime Health WORKERSCOMP $19.24
NovaNET WORKERSCOMP $19.64
CorVel Corporation WORKERSCOMP $19.64
Cigna NewBusiness $23.64
Cigna OAP $26.85
Oscar HIX $40.08
BCBS BlueCare $47.69
Humana HumanaChoice $53.44
Humana BroadNetwork $53.44
Humana NarrowExchangeNetwork $53.44
Humana HumanaChoiceCare $53.44

Visitor-reported prices

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Test urine for porphyrins at other Tennessee hospitals

Hospital City Cash price Negotiated range
62-1166050 BMH Carroll County Huntingdon $33.35 $11.62 – $26.72
62-1138045 BMH Union City Union City $83.20 $11.62 – $26.72
Ascension Saint Thomas Midtown Nashville not published $4.81 – $41.76
Ascension Saint Thomas DeKalb Smithville not published $6.04 – $41.76
Ascension Saint Thomas Highlands Sparta not published $6.04 – $41.76
Ascension Saint Thomas River Park McMinnville not published $6.04 – $41.76
Ascension Saint Thomas Rutherford Murfreesboro not published $12.02 – $41.76
Ascension Saint Thomas Hickman Centerville not published $12.02 – $41.76

All Tennessee hospitals for this procedure →