Flu shot, recombinant (Flublok) cost in San Francisco, CA
In San Francisco-Oakland-Fremont, CA, 10 hospitals list a cash price for flu shot, recombinant, egg-free (Flublok): from $44.24 to $368.00, with a median of $44.24. The lowest listed price is at Kaiser Foundation Hospital - San Leandro and 8 other hospitals. Across California, the median is $92.32 at 53 hospitals.
Cash prices at 10 facilities across 9 cities for code 90673, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Jul 22, 2026 and Jul 22, 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 Francisco-Oakland-Fremont, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Kaiser Foundation Hospital - San Leandro lowest San Leandro, CA · (510) 454-1000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - South San Francisco lowest South San Francisco, CA · (650) 742-3200 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Walnut Creek lowest Walnut Creek, CA · (925) 295-4000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Oakland/Richmond lowest Oakland, CA · (510) 752-1000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Antioch lowest Antioch, CA · (925) 813-6500 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - San Rafael lowest San Rafael, CA · (415) 444-2000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - San Francisco lowest San Francisco, CA · (415) 833-2646 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Fremont lowest Fremont, CA · (510) 784-4000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Redwood City lowest Redwood City, CA · (650) 299-2000 RIV3 VACCINE PRESERVATIVE FREE FOR IM USE | $44.24 | $79.00 | — | 44% | — source file |
| Kaiser Foundation Hospital - Redwood City Redwood City, CA · (650) 299-2000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - Fremont Fremont, CA · (510) 784-4000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - Oakland/Richmond Oakland, CA · (510) 752-1000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - South San Francisco South San Francisco, CA · (650) 742-3200 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - San Rafael San Rafael, CA · (415) 444-2000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - San Leandro San Leandro, CA · (510) 454-1000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - Walnut Creek Walnut Creek, CA · (925) 295-4000 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - Antioch Antioch, CA · (925) 813-6500 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Kaiser Foundation Hospital - San Francisco San Francisco, CA · (415) 833-2646 flu vaccine TV 2025-26 (9 yrs up) RCM (PF) 135 mcg (45 mcg x 3)/0.5 mL Syringe 0.5 mL SYRINGE | $152.15 | $271.70 | — | 44% | — source file |
| Chinese Hospital San Francisco, CA · (415) 677-2480 Influenza vaccine, trivalent derived from recombinant DNA | $368.00 | $368.00 | $150.22–$662.40 | — | Jul 22, 2026 source file |
Outpatient: lowest $44.24, median $44.24, highest $368.00 — a 8.3× difference within the same market.
As an inpatient, the same code is billed by 9 facilities here, median $44.24. 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
Flublok is a recombinant flu vaccine made without eggs. The CDC prefers it, the high-dose and the adjuvanted flu shots for people 65 and older.
What the price covers
The price is for the vaccine dose. Giving the shot is usually a separate line (code 90471 for the first vaccine of the visit, 90472 for each additional one).