PTT blood test cost in Northridge, CA
In Northridge, CA, 1 hospital lists a cash price for partial thromboplastin time (PTT) clotting test: from $8.60 to $8.60, with a median of $8.60. Across California, the median is $37.67 at 164 hospitals.
Cash prices at 1 facility for code 85730, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Feb 28, 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 Northridge, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Dignity Community Care lowest Northridge, CA · (818) 885-8500 RL-A-RF BILL PTTT 3017033 | $8.60 | $30.80 | $4.32–$38.30 | 72% | Feb 28, 2026 source file |
| Dignity Community Care Northridge, CA · (818) 885-8500 PARTIAL THROMBO TIME | $154.29 | $553.00 | $6.01–$553.00 | 72% | Feb 28, 2026 source file |
Outpatient: lowest $8.60, median $8.60, highest $8.60.
As an inpatient, the same code is billed by 1 facility here, median $8.60. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
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.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 85730 ($49.53). 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.
| Dignity Community Care Northridge, CARL-A-LUPUS RFLX 3017009C | $1.87 | file |