CMS Price Transparency Data

Blood test, urea nitrogen (BUN, kidney)

Facility: Christus Santa Rosa Hospital-San Marcos

Billing Code: 84520 (CPT)

The BaseRate · fair price high confidence

A fair price for this

about 1.3× the $4 Medicare rate · typically $4–$6

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 $4 Fair price $5 This hospital $4

How we calculate the fair BaseRate →

How this hospital compares to other TX hospitals

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

Cheapest $3 Priciest $4

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

A fair price for a Blood test, urea nitrogen (BUN, kidney) is about $5 (about 1.3× the $4 Medicare rate). Christus Santa Rosa Hospital-San Marcos charges insurers about $4 — below the fair price — a good deal. Located in San Marcos, TX.

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	$4 - $145	101%
Blue Cross Blue Shieldmajor	$4 - $18	101%
Aetnamajor	$4	101%
Cignamajor	$4 - $20	101%
Humanamajor	$4 - $30	101%
Amerigroup	$4	101%
Devoted Health	$4	101%
Healthcare Highways	$9	228%
WellCare	$4	101%
+ 9 smaller / regional plans	$4 - $7

Government programs also on file: Military & VA.

Excludes 1 rental-network / third-party entry (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, 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: 84520.

Insurance Before you use insurance

Call your insurance company to confirm Christus Santa Rosa Hospital-San Marcos is in-network.
Ask your insurer whether prior approval is required for CPT code 84520.
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 Christus Santa Rosa Hospital-San Marcos

Compare: Blood test, urea nitrogen (BUN, kidney) at other TX hospitals

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