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PricedCare

Partial thromboplastin time (blood clotting test) in Boston, MA-NH costs $11 to $85. Here's every hospital's price.

6 hospitals in the Boston-Cambridge-Newton, MA-NH 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 Boston-Cambridge-Newton, MA-NH metro area, 6 hospitals list a cash price for partial thromboplastin time (blood clotting test) (CPT 85730). The lowest is $11 at Boston Medical Center-Brighton, the median is $18 and the highest is $85 at Franciscan Children's Hospital & Rehab Center. The most expensive hospital lists 7.4 times the cheapest for the same code.

The Boston, MA-NH median of $18 is 38% below the national median of $28 across 571 US hospitals with a cash price for this code.

7 of these hospitals also publish the rates they negotiated with insurers, from $5 to $513. 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 January 2026 and April 2026. 34 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.

$11
lowest cash price in Boston, MA-NH
Boston Medical Center-Brighton · 13 mi
$6 below the median
$18
median cash price
6 hospitals
7.4×
highest ÷ lowest
same procedure, same metro
6/41
hospitals with a cash price
34 don't · see who

Sorted by cash price

Hospital facility fee only
1
Boston Medical Center-Brighton

Brighton · 13 mi · File Mar 2026

$11
list $25 · lowest of 2 lines
2
Lowell General Hospital

Lowell · 19 mi · File Apr 2026

$15
list $21 · lowest of 6 lines
3
Tufts Medical Center

Boston · 12 mi · File Apr 2026

$15
list $21 · lowest of 3 lines
4
Signature Healthcare Brockton Hospital

Brockton · 30 mi · File Jan 2026

$18
list $25 · lowest of 4 lines
5
Boston Medical Center

Boston · 13 mi · File Mar 2026

$21
list $46 · lowest of 2 lines
6
Cambridge Health Alliance

Cambridge · 11 mi · File Mar 2026

$36
list $36 · lowest of 2 lines
7
Franciscan Children's Hospital & Rehab Center

Brighton · 13 mi · File Apr 2026

$85
list $107
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 Boston, MA-NH 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