CMS Price Transparency Data

Blood test, clotting time (PTT)

Facility: John Muir Medical Center - Walnut Creek Campus

Billing Code: 85730 (CPT)

The BaseRate · fair price high confidence

A fair price for this

about 1.2× the $6 Medicare rate · typically $6–$16

modeled estimate · not a bill or quote

What this hospital charges insurers

Below the fair price — a good deal

about $1 under the fair price · 1.0× Medicare

Medicare pays $6 Fair price $7 This hospital $6 Cash price $18 Hospital's list price $40

How we calculate the fair BaseRate →

How this hospital compares to other CA hospitals

Highest price of the 9 CA hospitals we have prices for — worth calling around.

Cheapest $4 Priciest $6

Black dot = this hospital, among the 9 CA hospitals with a price for this procedure. Full list below.

A fair price for a Blood test, clotting time (PTT) is about $7 (about 1.2× the $6 Medicare rate). John Muir Medical Center - Walnut Creek Campus charges insurers about $6, or about $18 in cash — below the fair price — a good deal. Located in Walnut Creek, CA.

What each insurance company pays

Which insurers have negotiated a price with this hospital for this procedure — and which haven’t.

6 of 6 major insurers have a published price at this hospital

✓ UnitedHealthcare✓ Blue Cross Blue Shield✓ Aetna✓ Cigna✓ Humana✓ Kaiser Permanente

Crossed out = this hospital hasn’t published a negotiated price for that insurer for this procedure. It doesn’t necessarily mean they aren’t accepted — ask your insurer.

Insurance company	Price range	vs. Medicare
UnitedHealthcaremajor	$2 - $249	33%
Blue Cross Blue Shieldmajor	$2 - $276	33%
Aetnamajor	$3 - $307	50%
Cignamajor	$2 - $304	33%
Humanamajor	$3 - $353	50%
Kaiser Permanentemajor	$3 - $344	50%
Health Net	$2 - $243	33%
+ 29 smaller / regional plans	$1 - $4,000

Government programs also on file: Medicare, Military & VA.

Excludes 10 rental-network / third-party entries (e.g. Multiplan, PHCS) — these are pricing networks, not insurers.

Self-Pay How to get the cash price

Tell the billing desk you want to be billed as self-pay — not through insurance — before your visit.
Ask for the cash / prompt-pay discount in writing, with the exact price (about 18), before you agree to anything.
Get it in writing that they won’t also bill your insurance, so the cash price is what you owe.
Check the CPT code on your bill matches exactly: 85730.

Insurance Before you use insurance

Call your insurance company to confirm John Muir Medical Center - Walnut Creek Campus is in-network.
Ask your insurer whether prior approval is required for CPT code 85730.
Confirm the doctor or provider is in-network too — not just the hospital building.
Check your Explanation of Benefits against the hospital’s final itemized bill.

Estimate your out-of-pocket cost

A rough estimate of what you’d pay with insurance (deductible + coinsurance) versus paying the cash price yourself.

How you’d pay

Deductible left to meet ($)

Your coinsurance (%)

Enter your details and press estimate to compare.

Other Procedures at John Muir Medical Center - Walnut Creek Campus

Compare: Blood test, clotting time (PTT) at other CA hospitals

Insurance negotiated median for the same procedure, sorted lowest first.