PTT blood test cost in San Francisco, CA
In San Francisco-Oakland-Fremont, CA, 26 hospitals list a cash price for partial thromboplastin time (PTT) clotting test: from $4.69 to $259.00, with a median of $157.84. The lowest listed price is at Stanford Health Care Tri-Valley — $153.15 less than the median here. Across California, the median is $62.50 at 221 hospitals.
- The median here, $157.84, is 251% above the US median of $45.00.
- That is 26.3× Medicare's 2026 national rate for the same service ($6.01).
- San Francisco, CA ranks 5th of 5 metro areas in California by median, cheapest first.
- 12 of 26 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 26 facilities across 18 cities for code 85730, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 31, 2026; the hospital files themselves were last updated between Feb 23, 2026 and Sep 30, 2026.
Lowest$4.69Stanford Health Care Tri-Valley
Median$157.84half of hospitals charge less
Highest$259.00in this market
Difference55.2×highest vs lowest
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 Francisco-Oakland-Fremont, CA.
median
Lowest $4.69Highest $259.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Stanford Health Care Tri-Valley lowest Pleasanton, CA · (925) 847-3000 Ptt-D File of Apr 1, 2026 · source file | $4.69 | $11.73 | — | 60% |
| Stanford Health Care Tri-Valley Pleasanton, CA · (925) 847-3000 Inhibitor Assay, Ptt File of Apr 1, 2026 · source file | $4.94 | $12.35 | — | 60% |
| Stanford Health Care Tri-Valley Pleasanton, CA · (925) 847-3000 Ptt Inhibitor Scr-85730 File of Apr 1, 2026 · source file | $5.01 | $12.53 | — | 60% |
| Stanford Health Care Tri-Valley Pleasanton, CA · (925) 847-3000 Partial Thromboplastin Time File of Apr 1, 2026 · source file | $5.82 | $14.55 | — | 60% |
| Sequoia Hospital Redwood City, CA · (650) 369-5811 RL-SU-THROMBOPLASTIN PTT File of Sep 30, 2026 · source file | $9.22 | $27.00 | $5.67–$27.00 | 66% |
| Stanford Health Care Tri-Valley Pleasanton, CA · (925) 847-3000 Thromboplastin Time Partial File of Apr 1, 2026 · source file | $14.00 | $35.00 | — | 60% |
| St. Rose Hospital Hayward, CA · (510) 782-6200 THROMBOPLASTINTIMEPART(PTT)+1 more line at this price File of Feb 23, 2026 · source file | $30.87 | $102.90 | $5.60–$87.47 | 70% |
| St. Rose Hospital Hayward, CA · (510) 782-6200 LC THROMBOPLASTIN TIME PARTIAL File of Feb 23, 2026 · source file | $35.74 | $119.13 | $5.60–$101.26 | 70% |
| St. Rose Hospital Hayward, CA · (510) 782-6200 LC-THROMBIN TIME PARTIAL File of Feb 23, 2026 · source file | $38.66 | $128.87 | $5.60–$109.54 | 70% |
| St. Rose Hospital Hayward, CA · (510) 782-6200 WHS-APTT File of Feb 23, 2026 · source file | $61.13 | $203.78 | $5.60–$173.21 | 70% |
| Sequoia Hospital Redwood City, CA · (650) 369-5811 PARTIAL THROMBO TIME File of Sep 30, 2026 · source file | $88.70 | $260.00 | $6.01–$213.20 | 66% |
| Stanford Health Care Tri-Valley Pleasanton, CA · (925) 847-3000 HC Thromplas Ptt File of Apr 1, 2026 · source file | $111.20 | $278.00 | — | 60% |
| Kaiser Foundation Hospital - San Francisco San Francisco, CA · (415) 833-2646 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - San Leandro San Leandro, CA · (510) 454-1000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - Fremont Fremont, CA · (510) 784-4000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - San Rafael San Rafael, CA · (415) 444-2000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - Antioch Antioch, CA · (925) 813-6500 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Fnd Hospital - Richmond Campus Richmond, CA · (510) 752-1000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - South San Francisco South San Francisco, CA · (650) 742-3200 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - Walnut Creek Walnut Creek, CA · (925) 295-4000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - Oakland/Richmond Oakland, CA · (510) 752-1000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| Kaiser Foundation Hospital - Redwood City Redwood City, CA · (650) 299-2000 THROMBOPLASTIN TIME PARTIAL PLASMA/WHOLE BLOOD File of Apr 1, 2026 · source file | $141.68 | $253.00 | $5.00–$15.00 | 44% |
| MarinHealth Medical Center Greenbrae, CA · (415) 925-7900 COAGULATION ASSESSMENT BLOOD TEST; PLASMA OR WHOLE BLOOD File of Mar 26, 2026 · source file | $174.00 | $290.00 | $6.01–$2,330.00 | 40% |
| Novato Community Hospital Novato, CA · (415) 209-1300 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Alta Bates Summit Medical Center-Summit Campus-Hawthorne Oakland, CA · (510) 655-4000 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Alta Bates Summit Medical Center - Herrick Campus Berkeley, CA · (510) 204-4444 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| California Pacific Medical Center- Van Ness Campus San Francisco, CA · (415) 600-6000 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Alta Bates Summit Medical Center - Alta Bates Camp Berkeley, CA · (510) 204-4444 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Mills Health Center San Mateo, CA · (650) 696-5400 HCHG PTT PLASMA OR WHOLE BLOOD+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Alta Bates Summit Medical Center Oakland, CA · (510) 655-4000 HCHG CORE PTT PLAS OR WB+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Sutter Delta Medical Center Antioch, CA · (925) 779-7200 HCHG CORE PTT PLAS OR WB+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| California Pacific Medical Ctr-Davies Campus Hospital San Francisco, CA · (415) 600-6000 HCHG CORE PTT PLAS OR WB+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Mills-Peninsula Medical Center Burlingame, CA · (650) 696-5400 HCHG CORE PTT PLAS OR WB+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Eden Medical Center Castro Valley, CA · (510) 537-1234 HCHG CORE PTT PLAS OR WB+1 more line at this price File of Apr 1, 2026 · source file | $236.00 | $236.00 | — | — |
| Chinese Hospital San Francisco, CA · (415) 677-2480 Coagulation assessment blood test, plasma or whole blood File of Jul 22, 2026 · source file | $259.00 | $259.00 | $6.01–$466.20 | — |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Outpatient: lowest $4.69, median $157.84, highest $259.00 — a 55.2× difference within the same market.
As an inpatient, the same code is billed by 24 facilities here, median $141.68. 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 4 of 14 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it below every plan's rate. 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 PTT blood test is, what the price covers and why prices differ: PTT blood test explained.
5 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 85730 ($46.15). 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.
| Hospital | Cash price | File |
|---|---|---|
| Sequoia Hospital Redwood City, CARL-A-LUPUS RFLX 3017009C | $2.28 | file |
| Sequoia Hospital Redwood City, CARL-A-ANTI PHOS 3017157C | $2.39 | file |
| MarinHealth Medical Center Greenbrae, CATHROMBOPLASTIN TIME PARTIAL | $2.82 | file |
| St. Rose Hospital Hayward, CALC THROMBOPL TIME PART PLSMA | $3.22 | file |
| Sequoia Hospital Redwood City, CARL-A-PTT INHIB 2003266 | $3.71 | file |
File Link to the hospital's own price file.