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PricedCare

Prothrombin time (blood clotting test) in Houston, TX costs $4 to $178. Here's every hospital's price.

18 hospitals in the Houston-Pasadena-The Woodlands, TX 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 Houston-Pasadena-The Woodlands, TX metro area, 18 hospitals list a cash price for prothrombin time (blood clotting test) (CPT 85610). The lowest is $4 at Harris Health, the median is $135 and the highest is $178 at St Luke's Hospital at the Vintage. The most expensive hospital lists 42 times the cheapest for the same code.

The Houston, TX median of $135 is 496% above the national median of $23 across 569 US hospitals with a cash price for this code.

18 of these hospitals also publish the rates they negotiated with insurers, from $2 to $509. 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 2023 and April 2026. 42 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.

$4
lowest cash price in Houston, TX
Harris Health · 7 mi
$130 below the median
$135
median cash price
18 hospitals
42×
highest ÷ lowest
same procedure, same metro
18/60
hospitals with a cash price
42 don't · see who

Sorted by cash price

Hospital facility fee only
1
Harris Health

Houston · 7 mi · File Mar 2026

$4
list $19 · lowest of 4 lines
2
University of Texas Medical Branch Galveston

Galveston · 48 mi · Older file Mar 2023

$5
list $19 · lowest of 5 lines
3
Shriners Hospitals for Children

Galveston · 48 mi · File Mar 2026

$30
list $30
4
Legent North Houston Surgical Hospital

Bellaire · 10 mi · File Mar 2026

$71
list $142 · lowest of 2 lines
5
St Luke's Patients Medical Center

Pasadena · 16 mi · File Feb 2026

$109
list $310 · lowest of 8 lines
6
Houston Methodist Baytown Hospital

Baytown · 22 mi · File Apr 2026

$135
list $269 · lowest of 2 lines
7
Houston Methodist Clear Lake Hospital

Nassau Bay · 23 mi · File Apr 2026

$135
list $269 · lowest of 2 lines
8
Houston Methodist Sugarland Hospital

Sugar Land · 24 mi · File Apr 2026

$135
list $269
9
Houston Methodist Willowbrook Hospital

Houston · 17 mi · File Apr 2026

$135
list $269 · lowest of 2 lines
10
Houston Methodist West Hospital

Houston · 21 mi · File Apr 2026

$135
list $269 · lowest of 2 lines
11
Houston Methodist the Woodlands Hospital

The Woodlands · 29 mi · File Apr 2026

$135
list $269 · lowest of 2 lines
12
Houston Methodist Cypress Hospital

Cypress · 23 mi · File Apr 2026

$135
list $269 · lowest of 2 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 Houston, TX 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