There are 5 Hematology-Oncology clinicians in O Fallon, IL in Medicare’s data, ranked by the number of Medicare services they provide.
Hematology-Oncology clinicians in O Fallon
| Clinician | Experience | Telehealth | Medicare patients | Assignment |
|---|---|---|---|---|
| Bassam Maalouf, M.D. | 24 yrs | Yes | 660 | Accepts |
| Bachir Farah, M.D. | 19 yrs | Yes | 487 | Accepts |
| Mark Walshauser, M.D. | 20 yrs | Yes | 524 | Accepts |
| Justin Floyd, DO | 26 yrs | Yes | 522 | Accepts |
| Rachael Demattei, APRN | 4 yrs | — | 60 | Accepts |
What the columns mean
- Experience — years since the clinician’s medical-school graduation (when known).
- Telehealth — the clinician reported providing telehealth (video/phone) visits.
- Medicare patients — distinct Original-Medicare beneficiaries in the latest year; a volume signal, not a quality rating.
- Assignment — “Accepts” means they accept the Medicare-approved amount as full payment (lower out-of-pocket for Medicare patients).
Compare hospital prices in O Fallon → · All Hematology-Oncology cities →
Source: CMS Medicare Physician & Other Practitioners and the Doctors & Clinicians National Downloadable File (most recent release). Counts reflect Original Medicare activity only and are not a measure of quality. “Medicare allows” is the Medicare fee schedule amount — not what an insured or cash patient pays; for patient prices see the linked procedure pages. Always confirm a clinician’s current details with their office.