Diagnostic mammogram, both breasts in St. Louis, MO-IL
In St. Louis, MO-IL, 10 hospitals list a cash price for Diagnostic mammogram, both breasts (both sides): from $246.89 to $571.68, with a median of $437.78. The lowest listed price is at American Healthcare Systems Illinois LLC.
Cash prices at 10 facilities across 9 cities for code 77066, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between — and —.
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 | Off list | File date |
|---|---|---|---|---|
| American Healthcare Systems Illinois LLC both sides lowest Granite City, IL BR-DIG MAMMO BILAT | $246.89 | $411.49 | 40% | — source file |
| Mercy Hospital Lincoln both sides Troy, MO Mamm Diagnostic Bilat W Cad | $332.80 | $512.00 | 35% | — source file |
| Mercy Hospitals East Communities dba Mercy Hospital St Louis both sides Saint Louis, MO Mamm Diagnostic Bilat W Cad | $372.45 | $573.00 | 35% | — source file |
| Mercy Hospitals East Communities dba Mercy Hospital Washington both sides Washington, MO Mamm Diagnostic Bilat W Cad | $386.10 | $594.00 | 35% | — source file |
| Mercy Hospital South both sides Saint Louis, MO Mamm Diagnostic Bilat W Cad | $419.90 | $646.00 | 35% | — source file |
| Mercy Hospital Jefferson both sides Festus, MO Mamm Diagnostic Bilat W Cad | $455.65 | $701.00 | 35% | — source file |
| St Josephs Hospital Hospital Sisters Third Order of St Francis both sides Breese, IL DX MAMMO INCL CAD BI | $480.96 | $668.00 | 28% | — source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis both sides Highland, IL DX MAMMO INCL CAD BI | $529.20 | $735.00 | 28% | — source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis both sides O'Fallon, IL DX MAMMO INCL CAD BI | $549.36 | $763.00 | 28% | — source file |
| Hshs Holy Family Hospital Inc both sides Greenville, IL DX MAMMO INCL CAD BI | $571.68 | $794.00 | 28% | — source file |
Both sides : lowest $246.89, median $437.78, highest $571.68 — a 2.3× difference within the same market.
As an inpatient, the same code is billed by 7 facilities here, median $529.20. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
What it is
A diagnostic mammogram of both breasts is an X-ray exam done to look into symptoms or to follow up on something seen on an earlier mammogram. It uses more targeted views than a routine screening exam.
What the price covers
The hospital price usually covers the imaging of both breasts, including computer-aided detection when used. The radiologist's reading is often billed separately, and 3D mammography or a breast ultrasound is billed under other codes.