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PricedCare

Prothrombin time (blood clotting test) in St. Louis, MO-IL costs $6 to $79. Here's every hospital's price.

18 hospitals in the St. Louis, MO-IL 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 St. Louis, MO-IL metro area, 18 hospitals list a cash price for prothrombin time (blood clotting test) (CPT 85610). The lowest is $6 at Ranken Jordan Pediatric Bridge Hospital, the median is $25 and the highest is $79 at Mercy Hospital St Louis. The most expensive hospital lists 13 times the cheapest for the same code.

The St. Louis, MO-IL median of $25 is 10% above the national median of $23 across 569 US hospitals with a cash price for this code.

17 of these hospitals also publish the rates they negotiated with insurers, from $1 to $103. 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 March 2026 and June 2026. 18 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.

$6
lowest cash price in St. Louis, MO-IL
Ranken Jordan Pediatric Bridge Hospital · 4 mi
$19 below the median
$25
median cash price
18 hospitals
13×
highest ÷ lowest
same procedure, same metro
18/36
hospitals with a cash price
18 don't · see who

Sorted by cash price

Hospital facility fee only
1
Ranken Jordan Pediatric Bridge Hospital

Maryland Heights · 4 mi · File Apr 2026

$6
list $8 · lowest of 4 lines
2
Mercy Hospital Jefferson

Crystal City · 38 mi · File Jun 2026

$14
list $22 · lowest of 3 lines
3
Mercy Hospital Washington

Washington · 38 mi · File Jun 2026

$14
list $22 · lowest of 3 lines
4
Mercy Hospital Lincoln

Troy · 38 mi · File Jun 2026

$14
list $22 · lowest of 3 lines
5
Mercy Hospital South

Saint Louis · 16 mi · File Mar 2026

$15
list $15 · lowest of 3 lines
6
Ssm St Joseph Hospital West

Lake Saint Louis · 24 mi · File Apr 2026

$16
list $29 · lowest of 5 lines
7
OSF Saint Anthony's Health Center

Alton · 15 mi · File Mar 2026

$22
list $36 · lowest of 8 lines
8
Ssm Health Saint Louis University Hospital

Saint Louis · 10 mi · File Apr 2026

$23
list $41 · lowest of 3 lines
9
Ssm St Joseph Health Center

Saint Charles · 8 mi · File Apr 2026

$25
list $45 · lowest of 8 lines
10
Ssm St Clare Health Center

Fenton · 16 mi · File Apr 2026

$25
list $45 · lowest of 8 lines
11
Ssm Health St Mary's Hospital - St Louis

Saint Louis · 8 mi · File Apr 2026

$25
list $45 · lowest of 8 lines
12
Ssm Health Depaul Hospital St Louis

Bridgeton · 5 mi · File Apr 2026

$25
list $45 · lowest of 8 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 St. Louis, MO-IL 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