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PricedCare

Partial thromboplastin time (blood clotting test) in Houston, TX costs $6 to $211. Here's every hospital's price.

18 hospitals in the Houston-Pasadena-The Woodlands, TX metro area publish a cash price for partial thromboplastin time (blood clotting test) (CPT 85730). 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 partial thromboplastin time (blood clotting test) (CPT 85730). The lowest is $6 at Harris Health, the median is $35 and the highest is $211 at St Luke's Hospital at the Vintage. The most expensive hospital lists 35 times the cheapest for the same code.

The Houston, TX median of $35 is 23% above the national median of $28 across 571 US hospitals with a cash price for this code.

18 of these hospitals also publish the rates they negotiated with insurers, from $2 to $602. 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.

$6
lowest cash price in Houston, TX
Harris Health · 7 mi
$29 below the median
$35
median cash price
18 hospitals
35×
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

$6
list $18 · lowest of 4 lines
2
University of Texas Medical Branch Galveston

Galveston · 48 mi · Older file Mar 2023

$6
list $49 · lowest of 4 lines
3
Legent North Houston Surgical Hospital

Bellaire · 10 mi · File Mar 2026

$17
list $34 · lowest of 2 lines
4
Houston Methodist Hospital

Houston · 7 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
5
Houston Methodist Baytown Hospital

Baytown · 22 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
6
Houston Methodist Clear Lake Hospital

Nassau Bay · 23 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
7
Houston Methodist Sugarland Hospital

Sugar Land · 24 mi · File Apr 2026

$35
list $70 · lowest of 3 lines
8
Houston Methodist Willowbrook Hospital

Houston · 17 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
9
Houston Methodist West Hospital

Houston · 21 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
10
Houston Methodist the Woodlands Hospital

The Woodlands · 29 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
11
Houston Methodist Cypress Hospital

Cypress · 23 mi · File Apr 2026

$35
list $70 · lowest of 6 lines
12
Shriners Hospitals for Children

Galveston · 48 mi · File Mar 2026

$45
list $45
1

What's in the price

The hospital facility fee for CPT 85730. 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 85730, in writing, and whether it covers facility, physician and anesthesia."

About partial thromboplastin time (blood clotting test)

CPT 85730 is a partial thromboplastin time (PTT or aPTT), a clotting test that checks a different part of the clotting cascade from prothrombin time. It is used to monitor heparin, to investigate unexplained bleeding or bruising, and before surgery. One blood draw.

What the price covers

The laboratory analysis only. The blood draw is a separate small charge. It is often ordered together with prothrombin time (85610); the two are separate codes and separate prices.

Why prices vary

The test runs on automated coagulation analyzers and costs a laboratory a few dollars. Hospital list prices range from under $10 to over $150 for the same result. Independent laboratories are typically far cheaper.

Questions to ask

  • What is the self-pay price for 85730, and is PT (85610) also being billed?
  • Is the blood draw extra?
  • Can the sample be sent to an outside laboratory?

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