Psychiatric evaluation cost in St. Louis, MO
In St. Louis, MO-IL, 8 hospitals list a cash price for mental health diagnostic evaluation (intake), without medical services: from $143.65 to $244.50, with a median of $157.81. The lowest listed price is at Mercy Hospital Jefferson and 2 other hospitals — $14.16 less than the median here. Across Missouri, the median is $188.63 at 16 hospitals.
Cash prices at 8 facilities across 7 cities for code 90791, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 24, 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 |
|---|---|---|---|---|---|
| Mercy Hospital Jefferson lowest Festus, MO Pysch Eval W/O Med Services | $143.65 | $221.00 | $300.56–$726.00 | 35% | — source file |
| Mercy Hospital St Louis lowest Saint Louis, MO Pysch Eval W/O Med Services | $143.65 | $221.00 | $300.56–$726.00 | 35% | — source file |
| Mercy Hospital Lincoln lowest Troy, MO · (636) 528-8551 Pysch Eval W/O Med Services | $143.65 | $221.00 | $14.37–$221.00 | 35% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 PSYCH DIAG EVAL | $149.87 | $249.78 | $249.78 | 40% | — source file |
| Mercy Hospital Jefferson Festus, MO Cirs OP Psych Eval W/O Med Ser Pf | $165.75 | $255.00 | $16.58–$255.00 | 35% | — source file |
| Mercy Hospital Lincoln Troy, MO · (636) 528-8551 Cirs OP Psych Eval W/O Med Ser Pf | $165.75 | $255.00 | $191.76–$210.93 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 15 Min | $165.75 | $255.00 | $16.58–$229.50 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Cirs OP Psych Eval W/O Med Ser Pf | $165.75 | $255.00 | $134.95–$736.40 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 30 Min | $193.05 | $297.00 | $134.19–$736.40 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Psy Diag Inter W/O Med Ser Up to 15 Min | $198.25 | $305.00 | $485.68 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Psy Diag Inter W/O Med Ser Up to 15 Min | $221.00 | $340.00 | $134.95–$736.40 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 45 Min | $221.00 | $340.00 | $22.10–$306.00 | 35% | — source file |
| Ranken Jordan Home for Convalescent Crippled Children Hospital Maryland Heights, MO · (314) 872-6400 Psychiatric Diagnostic Evaluation (Limited) | $223.52 | $279.40 | — | 20% | Apr 24, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$293.40 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$293.40 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$293.40 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$293.40 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Lincoln Elsberry, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$293.40 | 25% | Jun 12, 2026 source file |
| Mercy Hospitals East Communities Washington, MO Psychiatric Diagnostic Evaluation | $244.50 | $326.00 | $163.00–$277.10 | 25% | Jun 12, 2026 source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 60 Min | $248.30 | $382.00 | $134.19–$736.40 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Psy Diag Inter W/O Med Ser Up to 30 Min | $248.30 | $382.00 | $134.95–$736.40 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Psy Diag Inter W/O Med Ser Up to 30 Min | $258.05 | $397.00 | $25.81–$397.00 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Pysch Eval W/O Med Services | $276.25 | $425.00 | $300.56 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 75 Min | $276.25 | $425.00 | $134.19–$736.40 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Psy Diag Inter W/O Med Ser Up to 45 Min | $276.25 | $425.00 | $485.68 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Psy Diag Inter W/O Med Ser Up to 45 Min | $278.20 | $428.00 | $485.68 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Neuropsych Diag Eval W/O Med Serv | $281.45 | $433.00 | $28.15–$433.00 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Psy Diag Inter W/O Med Ser Up to 60 Min | $283.40 | $436.00 | $485.68 | 35% | — source file |
| Mercy Hospital St Louis Saint Louis, MO Psy Diag Inter W/O Med Ser Up to 75 Min | $287.30 | $442.00 | $485.68 | 35% | — source file |
| Ranken Jordan Home for Convalescent Crippled Children Hospital Maryland Heights, MO · (314) 872-6400 Psychiatric Diagnostic Evaluation | $294.80 | $368.50 | — | 20% | Apr 24, 2026 source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 90 Min | $303.55 | $467.00 | $30.36–$420.30 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Psy Diag Inter W/O Med Ser Up to 60 Min | $303.55 | $467.00 | $485.68 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 105 Mn | $331.50 | $510.00 | $134.19–$736.40 | 35% | — source file |
| Mercy Hospital Jefferson Festus, MO Psy Diag Inter W/O Med Ser Up to 75 Min | $331.50 | $510.00 | $485.68 | 35% | — source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser > 120 Min | $333.45 | $513.00 | $33.35–$461.70 | 35% | — source file |
| Ranken Jordan Home for Convalescent Crippled Children Hospital Maryland Heights, MO · (314) 872-6400 Psychiatric Diagnostic Evaluation (Extended) | $366.08 | $457.60 | — | 20% | Apr 24, 2026 source file |
| Mercy Hospital Washington Washington, MO Psy Diag Inter W/O Med Ser Up to 120 Mn | $395.20 | $608.00 | $39.52–$547.20 | 35% | — source file |
Outpatient: lowest $143.65, median $157.81, highest $244.50 — a 1.7× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $234.01. 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 7 of 7 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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
This is a diagnostic evaluation by a mental health clinician, usually the first visit before therapy starts. It covers history, current symptoms, a mental status exam and a treatment plan, without medical services such as prescribing.
What the price covers
The price covers the evaluation visit. Psychological testing, follow-up therapy sessions and any facility fee at a hospital-based clinic are billed separately.