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PricedCare

Prothrombin time (blood clotting test) in San Francisco, CA costs $5 to $90. Here's every hospital's price.

6 hospitals in the San Francisco-Oakland-Fremont, CA metro area publish a cash price for prothrombin time (blood clotting test) (CPT 85610). We read their files every month so you don't have to.

Across the San Francisco-Oakland-Fremont, CA metro area, 6 hospitals list a cash price for prothrombin time (blood clotting test) (CPT 85610). The lowest is $5 at Stanford Health Care Tri-Valley, the median is $31 and the highest is $90 at Kaiser Foundation Hospital - Antioch. The most expensive hospital lists 19 times the cheapest for the same code.

The San Francisco, CA median of $31 is 37% above the national median of $23 across 569 US hospitals with a cash price for this code.

5 of these hospitals also publish the rates they negotiated with insurers, from $1 to $423. With insurance you pay a share of the negotiated rate, which is sometimes higher than the cash price; you may ask for the cash price instead.

The files behind these prices are dated between April 2026 and July 2026. 32 other hospitals in the metro area have no readable price for this code: some publish no file, some block automated reading, some leave the code out. They are listed below so you can call them.

$5
lowest cash price in San Francisco, CA
Stanford Health Care Tri-Valley · 22 mi
$26 below the median
$31
median cash price
6 hospitals
19×
highest ÷ lowest
same procedure, same metro
6/38
hospitals with a cash price
32 don't · see who

Sorted by cash price

Hospital facility fee only
1
Stanford Health Care Tri-Valley

Pleasanton · 22 mi · File Apr 2026

$5
list $12 · lowest of 5 lines
2
Washington Hospital

Fremont · 22 mi · File Apr 2026

$18
list $23 · lowest of 49 lines
3
Chinese Hospital

San Francisco · 7 mi · File Jul 2026

$31
list $31
4
UCSF Benioff Children's Hospital Oakland

Oakland · 4 mi · File Apr 2026

$62
list $206 · lowest of 2 lines
5
Kaiser Foundation Hospital - South San Francisco

South San Francisco · 12 mi · File Apr 2026

$90
list $160
6
Kaiser Foundation Hospital - Antioch

Antioch · 30 mi · File Apr 2026

$90
list $160 · lowest of 6 lines
1

What's in the price

The hospital facility fee for CPT 85610. The doctor, anesthesia and lab work usually bill separately.

2

Cash vs. insured

Cash is what you pay without insurance. With insurance you pay a share of the negotiated rate, which can be higher than cash. You may ask for the cash price.

3

What to say on the phone

"I'd like the self-pay price for CPT 85610, in writing, and whether it covers facility, physician and anesthesia."

About prothrombin time (blood clotting test)

CPT 85610 is a prothrombin time (PT), usually reported with INR. It measures how quickly blood clots and is used to monitor warfarin therapy, to check liver function and before surgery. It is a single blood test.

What the price covers

The laboratory analysis only. The blood draw is a separate small charge. Patients on warfarin often have this test monthly, so the price matters more than it looks; finger-stick INR at an anticoagulation clinic or at home is often cheaper.

Why prices vary

A PT/INR costs a laboratory very little to run, yet hospital list prices range from single digits to well over $100. For recurring tests, independent laboratories and anticoagulation clinics are usually far cheaper than hospital labs.

Questions to ask

  • What is the self-pay price for 85610 and the draw fee?
  • If I need this monthly, is there a cheaper standing arrangement?
  • Can I use a home INR meter instead?

Hospitals in San Francisco, CA without a price for this procedure

Listed so you know who to call. The reason is what we found on their website.

Questions people ask