SelfPayRates — hospital cash prices, from the source

Partial thromboplastin time (PTT) clotting test in Santa Rosa-Petaluma, CA

Cash prices at 4 facilities across 3 cities for code 85730, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.

HospitalCash price List priceOffFile date
NorCal HealthConnect LLC PETALUMA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD CDM
$22.95 $45.00 49% Apr 1, 2026
file
St Joseph Health Northern California LLC SANTA ROSA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD CDM
$22.95 $45.00 49% Apr 1, 2026
file
NorCal HealthConnect LLC PETALUMA, CA
HC THROMBOPLASTIN TIME PARTIAL
$31.11 $61.00 49% Apr 1, 2026
file
NorCal HealthConnect LLC PETALUMA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB
$31.11 $61.00 49% Apr 1, 2026
file
NorCal HealthConnect LLC PETALUMA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB
$35.54 $69.68 49% Apr 1, 2026
file
St Joseph Health Northern California LLC SANTA ROSA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB
$35.54 $69.68 49% Apr 1, 2026
file
NorCal HealthConnect LLC HEALDSBURG, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB
$37.74 $74.00 49% Apr 1, 2026
file
St Joseph Health Northern California LLC SANTA ROSA, CA
HC THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD LAB
$61.71 $121.00 49% Apr 1, 2026
file
St Joseph Health Northern California LLC SANTA ROSA, CA
HC THROMBOPLASTIN TIME PARTIAL
$61.71 $121.00 49% Apr 1, 2026
file
NorCal HealthConnect LLC PETALUMA, CA
HC THROMBOPLASTIN TIME PARTIAL
$76.34 $149.69 49% Apr 1, 2026
file
St Joseph Health Northern California LLC SANTA ROSA, CA
HC THROMBOPLASTIN TIME PARTIAL
$76.34 $149.69 49% Apr 1, 2026
file
KAISER FOUNDATION HOSPITAL - SANTA ROSA SANTA ROSA, CA
THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD
$141.68 $253.00 44%
file

Outpatient: lowest $22.95, median $36.64, highest $141.68 — a 6.2× difference within the same market.

As an inpatient, the same code is billed by 4 facilities here, median $36.64. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.

Other markets for this procedure