SelfPayRates — hospital cash prices, from the source

Prothrombin time (PT/INR) clotting test in Knoxville, TN

Cash prices at 6 facilities across 5 cities for code 85610, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Aug 5, 2026 and Aug 27, 2026.

HospitalCash price List priceOffFile date
PARKWEST MEDICAL CENTER LOUISVILLE, TN
PROTHROMBIN TIME
$5.67 $9.00 37% Aug 5, 2026
file
PARKWEST MEDICAL CENTER KNOXVILLE, TN
PROTHROMBIN TIME
$12.00 $40.00 70% Aug 5, 2026
file
FORT SANDERS REGIONAL MEDICAL CENTER KNOXVILLE, TN
PROTHROMBIN TIME
$13.20 $40.00 67% Aug 5, 2026
file
ROANE COUNTY MEDICAL CENTER HARRIMAN, TN
PROTHROMBIN TIME
$13.20 $40.00 67% Aug 5, 2026
file
METHODIST MEDICAL CENTER OF OAK RIDGE OAK RIDGE, TN
PROTHROMBIN TIME
$13.20 $40.00 67% Aug 5, 2026
file
FORT LOUDOUN MEDICAL CENTER LENOIR CITY, TN
PROTHROMBIN TIME
$13.20 $40.00 67% Aug 27, 2026
file
PARKWEST MEDICAL CENTER LOUISVILLE, TN
PROTHROMBIN TIME
$25.20 $40.00 37% Aug 5, 2026
file

Outpatient: lowest $5.67, median $13.20, highest $25.20 — a 4.4× difference within the same market.

As an inpatient, the same code is billed by 1 facility here, median $5.67. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.

5 rows held back from this comparison

They are priced below $1 or below a tenth of the national median for code 85610 ($33.60). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.

PARKWEST MEDICAL CENTER KNOXVILLE, TN
PROTHROMBIN TIME
$2.70 file
FORT SANDERS REGIONAL MEDICAL CENTER KNOXVILLE, TN
PROTHROMBIN TIME
$2.97 file
METHODIST MEDICAL CENTER OF OAK RIDGE OAK RIDGE, TN
PROTHROMBIN TIME
$2.97 file
FORT LOUDOUN MEDICAL CENTER LENOIR CITY, TN
PROTHROMBIN TIME
$2.97 file
ROANE COUNTY MEDICAL CENTER HARRIMAN, TN
PROTHROMBIN TIME
$2.97 file

Other markets for this procedure