Diagnostic mammogram, both breasts in Napa, CA
In Napa, CA, 1 hospital lists a cash price for Diagnostic mammogram, both breasts: from $527.85 to $574.26, with a median of $551.06.
Cash prices at 1 facility 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 Apr 1, 2026 and Apr 1, 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 Napa, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Off list | File date |
|---|---|---|---|---|
| St Joseph Health Northern California LLC lowest Napa, CA HC MAMMO DIAG BIL W CAD | $527.85 | $1,035.00 | 49% | Apr 1, 2026 source file |
| St Joseph Health Northern California LLC Napa, CA HC MAMMO DIAG BIL W CAD | $574.26 | $1,126.00 | 49% | Apr 1, 2026 source file |
Outpatient: lowest $527.85, median $551.06, highest $574.26 — a 1.1× difference within the same market.
As an inpatient, the same code is billed by 1 facility here, median $574.26. 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.