Diagnostic mammogram cost in St. Louis, MO
In St. Louis, MO-IL, 2 hospitals list a cash price for diagnostic mammogram, both breasts: from $276.80 to $380.50, with a median of $328.65. The lowest listed price is at Community Hospital of Staunton — $51.85 less than the median here. Across Missouri, the median is $218.70 at 17 hospitals.
- The median here, $328.65, is 6% below the US median of $349.60.
- That is 3.0× Medicare's 2026 national rate for the same service ($110.56).
- Every hospital here lists a cash price below its full list price.
Cash prices at 15 facilities across 14 cities for code 77066, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 6, 2026 and Jun 10, 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 |
|---|---|---|---|---|
| Community Hospital of Staunton lowest Staunton, IL · (618) 635-2200 POST BIOPSY DIAG MAM - BIL File of Feb 9, 2026 · source file | $276.80 | $553.60 | $160.05–$503.78 | 50% |
| Anderson Hospital Maryville, IL · (618) 288-5711 POST BIOPSY DIAG MAM - BIL+1 more line at this price File of Feb 6, 2026 · source file | $380.50 | $761.00 | $97.03–$684.90 | 50% |
| Community Hospital of Staunton Staunton, IL · (618) 635-2200 DIGITAL MAM DIAG - BIL File of Feb 9, 2026 · source file | $395.45 | $790.90 | $228.66–$719.72 | 50% |
| Gateway Regional Medical Center both sides Granite City, IL · (618) 798-3000 BR-DIG MAMMO BILAT File of Mar 30, 2026 · source file | $246.89 | $411.49 | $411.49 | 40% |
| Touchette Regional Hospital both sides Cahokia Heights, IL · (618) 332-3060 Diagnostic mammography, including computer-aided detection (CAD) when performed; bilateral File of Apr 13, 2026 · source file | $268.46 | $433.00 | $17.32–$433.00 | 38% |
| Mercy Hospital Lincoln both sides Troy, MO · (636) 528-8551 Mamm Diagnostic Bilat W Cad File of Jun 10, 2026 · source file | $332.80 | $512.00 | $186.37–$232.93 | 35% |
| Mercy Hospital St Louis both sides Saint Louis, MO · (314) 251-6000 Mamm Diagnostic Bilat W Cad File of Jun 4, 2026 · source file | $372.45 | $573.00 | $103.80–$506.22 | 35% |
| Mercy Hospital Washington both sides Washington, MO · (636) 239-8000 Mamm Diagnostic Bilat W Cad File of Jun 10, 2026 · source file | $386.10 | $594.00 | $94.03–$506.22 | 35% |
| Mercy Hospital South both sides Saint Louis, MO · (314) 525-1000 Mamm Diagnostic Bilat W Cad File of Jun 10, 2026 · source file | $419.90 | $646.00 | $287.00–$336.00 | 35% |
| Carlinville Area Hospital both sides Carlinville, IL · (217) 854-3141 DIG MAM DIAG BILATERAL+1 more line at this price File of Mar 21, 2026 · source file | $436.80 | $624.00 | $224.64–$891.43 | 30% |
| Mercy Hospital Jefferson both sides Festus, MO · (636) 933-1000 Mamm Diagnostic Bilat W Cad File of Jun 10, 2026 · source file | $455.65 | $701.00 | $103.80–$536.77 | 35% |
| St Josephs Hospital Hospital Sisters Third Order of St Francis both sides Breese, IL · (618) 526-4511 DX MAMMO INCL CAD BI File of Mar 24, 2026 · source file | $480.96 | $668.00 | $41.39–$668.00 | 28% |
| Jersey Community Hospital both sides Jerseyville, IL · (618) 498-6402 MG Mammo Diagnostic Bilateral.+3 more lines at this price File of Mar 10, 2026 · source file | $512.00 | $512.00 | $108.00–$435.20 | — |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis both sides Highland, IL · (618) 651-2600 DX MAMMO INCL CAD BI File of Mar 24, 2026 · source file | $529.20 | $735.00 | $96.33–$735.00 | 28% |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis both sides O'Fallon, IL · (618) 234-2120 DX MAMMO INCL CAD BI File of Mar 24, 2026 · source file | $549.36 | $763.00 | $41.39–$763.00 | 28% |
| Hshs Holy Family Hospital both sides Greenville, IL · (618) 664-1230 DX MAMMO INCL CAD BI File of Mar 24, 2026 · source file | $571.68 | $794.00 | $43.46–$794.00 | 28% |
Outpatient: lowest $276.80, median $328.65, highest $380.50 — a 1.4× difference within the same market.
Both sides : lowest $246.89, median $436.80, highest $571.68 — a 2.3× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $328.65. 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 2 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 diagnostic mammogram is, what the price covers and why prices differ: Diagnostic mammogram explained.