CMS Price Transparency Data

Colonoscopy (diagnostic)

Facility: John Muir Medical Center - Walnut Creek Campus

Billing Code: 45378 (CPT)

The BaseRate · fair price medium confidence

A fair price for this

$1,353

about 1.4× the $950 Medicare rate · typically $970–$3,471

modeled estimate · not a bill or quote

What this hospital charges insurers

$4,552

Well above the fair price

about $3,199 over the fair price · 4.8× Medicare

Medicare pays $950 Fair price $1,353 This hospital $4,552 Cash price $12,302 Hospital's list price $27,337

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 $148 Priciest $4,552

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

A fair price for a Colonoscopy (diagnostic) is about $1,353 (about 1.4× the $950 Medicare rate). John Muir Medical Center - Walnut Creek Campus charges insurers about $4,552, or about $12,302 in cash — well above the fair price. Located in Walnut Creek, CA.

This price is above the fair BaseRate — you may be able to pay less

Ask the hospital for the cash / self-pay price, check whether you qualify for financial assistance, or negotiate the bill down toward the fair price of about $1,353. Many patients pay well below the first number they’re quoted — the checklists below walk you through it.

What each insurance company pays

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

5 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	$246 - $21,354	26%
Blue Cross Blue Shieldmajor	$1,313 - $11,715	138%
Aetnamajor	$1,313 - $12,599	138%
Cignamajor	$12,628 - $15,785	1329%
Humanamajor	$1,313	138%
Health Net	$1,287	135%
+ 18 smaller / regional plans	$246 - $11,715

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

Excludes 3 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 12,302), 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: 45378.

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 45378.
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: Colonoscopy (diagnostic) at other CA hospitals

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