Mono test cost in St. Louis, MO — inpatient
In St. Louis, MO-IL, 10 hospitals list a cash price for mono test (heterophile antibody, Monospot) as an inpatient: from $7.63 to $161.28, with a median of $62.25. The lowest listed price is at Ranken Jordan Home for Convalescent Crippled Children Hospital — $54.62 less than the median here. Across Missouri, the median is $33.45 at 32 hospitals.
Cash prices at 10 facilities across 10 cities for code 86308, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 16, 2026 and Jun 12, 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 St. Louis, MO-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Ranken Jordan Home for Convalescent Crippled Children Hospital lowest Maryland Heights, MO · (314) 872-6400 Heterophile, Mono Screen | $7.63 | $9.53 | — | 20% | Apr 24, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospitals East Communities Washington, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.05 | 25% | Jun 12, 2026 source file |
| Mercy Hospitals East Communities Washington, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.05 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Heterophile Antibodies Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO POC Monotest Heterophile Ab Screen | $9.75 | $13.00 | $6.50–$11.70 | 25% | Jun 12, 2026 source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 MONO SCREEN | $12.43 | $20.72 | $20.72 | 40% | — source file |
| Mercy Rehabilitation Hospital South Louis, MO HETEROPHILE ANTIBODY SCREEN | $17.94 | $17.94 | $17.94 | — | Mar 16, 2026 source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC HETEROPHILE SCR MONO | $106.56 | $148.00 | $10.36–$148.00 | 28% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC HETEROPHILE SCR MONO-90 | $108.72 | $151.00 | $5.18–$151.00 | 28% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC HETEROPHILE SCR MONO | $122.40 | $170.00 | $5.18–$170.00 | 28% | — source file |
| Mercy Rehabilitation Hospital St. Louis Chesterfield, MO HETEROPHILE ANTIBODY SCREEN | $128.22 | $128.22 | $128.22 | — | Mar 16, 2026 source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL HC HETEROPHILE SCR MONO | $142.56 | $198.00 | $5.18–$198.00 | 28% | — source file |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 HC HETEROPHILE SCR MONO | $161.28 | $224.00 | $5.18–$224.00 | 28% | — source file |
Inpatient: lowest $7.63, median $62.25, highest $161.28 — a 21.1× difference within the same market.
As an outpatient, the same code is billed by 14 facilities here, median $60.93 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 7 of 9 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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.