Mono test cost in Vallejo, CA
In Vallejo, CA, 3 hospitals list a cash price for mono test (heterophile antibody, Monospot): from $157.36 to $476.00, with a median of $157.36. The lowest listed price is at Kaiser Foundation Hospital & Rehab Center - Vallejo and 1 other hospital. Across California, the median is $93.06 at 102 hospitals.
Cash prices at 3 facilities across 3 cities for code 86308, 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.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Vallejo, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Kaiser Foundation Hospital & Rehab Center - Vallejo lowest Vallejo, CA · (707) 651-1000 HETEROPHILE ANTIBODIES SCREEN | $157.36 | $281.00 | $5.00–$15.00 | 44% | — source file |
| Kaiser Foundation Hospital - Vacaville lowest Vacaville, CA · (707) 624-4000 HETEROPHILE ANTIBODIES SCREEN | $157.36 | $281.00 | $5.00–$15.00 | 44% | — source file |
| NorthBay Medical Center Fairfield, CA · (707) 646-5000 Heterophile | $476.00 | $476.00 | — | — | Apr 1, 2026 source file |
| NorthBay Medical Center Fairfield, CA · (707) 646-5000 Heterophile | $476.00 | $476.00 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $157.36, median $157.36, highest $476.00 — a 3.0× difference within the same market.
As an inpatient, the same code is billed by 3 facilities here, median $157.36. 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 0 of 2 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 it is
The mono test looks for antibodies the body makes during infectious mononucleosis, usually caused by the Epstein-Barr virus.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.