Quick answers
- Which hospitals does Syed M. Hasan work at?
- Medicare's official clinician data lists Syed M. Hasan at 4 hospitals: Mercy Hospital Jefferson, Mercy Hospital South, Mercy Hospital St Louis and Parkland Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Syed M. Hasan see patients?
- Medicare's clinician data lists 1 practice location in Festus, MO. Call before your visit to confirm the address.
- What is Syed M. Hasan's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Medical Oncology.
- Does Syed M. Hasan accept Medicare assignment?
- Yes. Medicare's clinician data says Syed M. Hasan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Syed M. Hasan?
- (636) 931-3655, as listed in official Medicare / NPI Registry data.
- What is Syed M. Hasan's NPI number?
- 1285086868. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Syed M. Hasan works
Medicare's Facility Affiliation Data lists Syed M. Hasan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · CCN 260023
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Parkland Health CenterFarmington, MO · Acute Care Hospital · CCN 260163
Practice locations
Addresses where Syed M. Hasan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1350 US Hwy 61Festus, MO 63028 (636) 931‑3655
Group practices
Medicare enrollment lists Syed M. Hasan as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic Oncology LLC33 clinicians in the group
Specialties
- Internal Medicineprimary
- Medical Oncologyalso
Other internal medicine doctors in Festus
Clinicians with the same Medicare primary specialty in Festus, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285086868 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians