Partial thromboplastin time (PTT) clotting test in San Jose-Sunnyvale-Santa Clara, CA — inpatient
In San Jose-Sunnyvale-Santa Clara, CA, 4 hospitals list a cash price for Partial thromboplastin time (PTT) clotting test as an inpatient: from $7.09 to $225.60, with a median of $141.68. The lowest listed price is at El Camino Hospital.
Cash prices at 4 facilities across 4 cities for code 85730, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in San Jose-Sunnyvale-Santa Clara, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Off list | File date |
|---|---|---|---|---|
| El Camino Hospital lowest Mountain View, CA HC 31102493 LABACLPTT THROMBOPLASTIN PTT *5 | $7.09 | $28.35 | 75% | Apr 1, 2026 source file |
| El Camino Hospital Mountain View, CA HC PTT INHIBITOR SCREEN, APTT PTTINH THROMPLAS *5 1/6 | $7.61 | $30.45 | 75% | Apr 1, 2026 source file |
| El Camino Hospital Mountain View, CA HC PTT INHIBITOR SCREEN, 5 MIN NORM PTT (1:1 INCUBATED MIX W/ NP) *5 4/6 | $7.61 | $30.45 | 75% | Apr 1, 2026 source file |
| El Camino Hospital Mountain View, CA HC PTT | $114.75 | $459.00 | 75% | Apr 1, 2026 source file |
| Kaiser Foundation Hospital - San Jose San Jose, CA THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $141.68 | $253.00 | 44% | — source file |
| Kaiser Foundation Hospital - Santa Clara Santa Clara, CA THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD | $141.68 | $253.00 | 44% | — source file |
| Stanford Health Care Stanford, CA HC Thromplas Ptt | $225.60 | $564.00 | 60% | Apr 1, 2026 source file |
| Stanford Health Care Stanford, CA HC Pttinh 5 Min Norm Plasma | $225.60 | $564.00 | 60% | Apr 1, 2026 source file |
| Stanford Health Care Stanford, CA Labaclptt Thromboplastin Ptt | $225.60 | $564.00 | 60% | Apr 1, 2026 source file |
Inpatient: lowest $7.09, median $141.68, highest $225.60 — a 31.8× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $228.55 — that is the price to compare if you are not being admitted.
What it is
The partial thromboplastin time (PTT or aPTT) test measures how long it takes blood to clot through a different pathway than the PT test. It is used to check for bleeding disorders, before surgery, and to monitor heparin.
What the price covers
The price usually covers the PTT test. The blood draw is often billed separately.