SelfPayRates — hospital cash prices, from the source

Prothrombin time (PT/INR) clotting test in San Francisco-Oakland-Fremont, CA

Cash prices at 12 facilities across 11 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 Feb 23, 2026 and Jul 22, 2026.

HospitalCash price List priceOffFile date
Stanford Health Care Tri-Valley PLEASANTON, CA
PT-D
$4.69 $11.73 60% Apr 1, 2026
file
Stanford Health Care Tri-Valley PLEASANTON, CA
Prothrombin Time
$5.82 $14.55 60% Apr 1, 2026
file
Hayward Sisters Hospital HAYWARD, CA
WHS-PT INR
$7.88 $26.25 70% Feb 23, 2026
file
Hayward Sisters Hospital HAYWARD, CA
LC-PT MIXING STUDY
$18.91 $63.02 70% Feb 23, 2026
file
Hayward Sisters Hospital HAYWARD, CA
PROTIME
$29.93 $99.75 70% Feb 23, 2026
file
Hayward Sisters Hospital HAYWARD, CA
PROTHROMBINTIMESERIES
$29.93 $99.75 70% Feb 23, 2026
file
CHINESE HOSPITAL ASSOCIATION SAN FRANCISCO, CA
Blood test, clotting time
$31.00 $31.00 Jul 22, 2026
file
Hayward Sisters Hospital HAYWARD, CA
LC-PROTHROMBIN TIME
$38.66 $128.88 70% Feb 23, 2026
file
KAISER FOUNDATION HOSPITAL - SOUTH SAN FRANCISCO SOUTH SAN FRANCISCO, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - WALNUT CREEK WALNUT CREEK, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - SAN LEANDRO SAN LEANDRO, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - SAN FRANCISCO SAN FRANCISCO, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - SAN RAFAEL SAN RAFAEL, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - FREMONT FREMONT, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - ANTIOCH ANTIOCH, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - REDWOOD CITY REDWOOD CITY, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
KAISER FOUNDATION HOSPITAL - OAKLAND/RICHMOND OAKLAND, CA
PROTHROMBIN TIME
$89.60 $160.00 44%
file
Stanford Health Care Tri-Valley PLEASANTON, CA
HC Prothrombin Time
$93.20 $233.00 60% Apr 1, 2026
file
Stanford Health Care Tri-Valley PLEASANTON, CA
Labaclpt Prothrombin Time
$142.00 $355.00 60% Apr 1, 2026
file

Outpatient: lowest $4.69, median $89.60, highest $142.00 — a 30.3× difference within the same market.

As an inpatient, the same code is billed by 11 facilities here, median $89.60. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.

1 row held back from this comparison

It is 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.

Hayward Sisters Hospital HAYWARD, CA
LC PROTHROMBIN TIME
$3.22 file

Other markets for this procedure