Diagnostic mammogram, both breasts in St. Louis, MO-IL — inpatient
In St. Louis, MO-IL, 7 hospitals list a cash price for Diagnostic mammogram, both breasts (both sides) as an inpatient: from $246.89 to $1,116.30, with a median of $529.20. The lowest listed price is at American Healthcare Systems Illinois LLC.
Cash prices at 7 facilities across 7 cities for code 77066, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 16, 2026 and Mar 16, 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 | 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 Rehabilitation Hospital St. Louis both sides Chesterfield, MO MAMMOGRAM DIAG BILATERAL | $468.92 | $468.92 | — | Mar 16, 2026 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 |
| Mercy Rehabilitation Hospital South both sides Louis, MO MAMMOGRAM DIAG BILATERAL | $1,116.30 | $1,116.30 | — | Mar 16, 2026 source file |
Both sides : lowest $246.89, median $529.20, highest $1,116.30 — a 4.5× difference within the same market.
As an outpatient, the same code is billed by 10 facilities here, median $437.78 — that is the price to compare if you are not being admitted.
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.