Assay of interleukin-6 (il-6) 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.

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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.

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The hospital's undiscounted list price — almost no one pays this.

$7.77 with Wellpoint vs $69.08 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 $7.77
Aetna NewBusiness $13.73
Aetna COMM $13.73
BCBS TENNCARE $14.03
BCBS COVERKIDS $15.15
United CorePayer $17.27
Humana ChoicecareMGMCR $17.27
BCBS NetworkP $17.27
Bright Health SmallGroup $17.27
Sarah Cannon Research COMM $17.27
United AllPayerAppendix $17.27
United HeritageSelect $17.27
Bright Health HIX $17.27
WellCare MCR $17.79
Zing MGMCR $17.79
Ambetter Select $17.96
American Health Advantage MCRPOS $18.13
United VACCN $18.13
American Health Advantage MCRHMO $18.13
Devoted Health Plan MCR $18.13
American Health Advantage MCRPPO $18.13
American Health Advantage MCRSNP $18.13
American Health Advantage MCRPFFS $18.13
Evergreen HMO MCR $18.13
Healthspring MCRPPO $18.13
Healthspring MCRHMONonTMN $18.13
Healthspring MCRHMOTMN $18.13
Aetna MGMCRPPO $18.31
Aetna MGMCRHMO $18.31
Aetna MGMCRSNP $18.31
Ambetter CORE $18.65
ATRIO Golden Times MCR $19.00
Signature Advantage MCR $19.22
Bright Health MCRNarrow $20.85
Prime Health WORKERSCOMP $24.87
CorVel Corporation WORKERSCOMP $25.39
NovaNET WORKERSCOMP $25.39
Cigna NewBusiness $30.57
Cigna OAP $34.71
BCBS BlueCare $40.55
Oscar HIX $51.81
Humana HumanaChoice $69.08
Humana BroadNetwork $69.08
Humana HumanaChoiceCare $69.08
Humana NarrowExchangeNetwork $69.08

Visitor-reported prices

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Assay of interleukin-6 (il-6) at other Tennessee hospitals

Hospital City Cash price Negotiated range
Ascension Saint Thomas Midtown Nashville $54.59 $15.54 – $30.40
62-1166050 BMH Carroll County Huntingdon $13.34 $14.03 – $34.54
Johnson City Medical Center JOHNSON CITY $31.80 $8.64 – $37.65
Ascension Saint Thomas DeKalb Smithville $54.59 $15.54 – $36.44
Ascension Saint Thomas Highlands Sparta $54.59 $15.54 – $36.44
Ascension Saint Thomas River Park McMinnville $54.59 $15.54 – $36.44
Ascension Saint Thomas Rutherford Murfreesboro $54.59 $15.54 – $35.40
Hancock County Hospital SNEEDVILLE $31.05 $8.64 – $38.25

All Tennessee hospitals for this procedure →