Quick answers
- Which hospitals does Marwan Massouh work at?
- Medicare's official clinician data lists Marwan Massouh at 5 hospitals: Barrett Hospital & Healthcare, Deer Lodge Medical Center, Firelands Regional Medical Center, Fisher-Titus Hospital and St James Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marwan Massouh see patients?
- Medicare's clinician data lists 1 practice location in Sandusky, OH. Call before your visit to confirm the address.
- What is Marwan Massouh's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Marwan Massouh accept Medicare assignment?
- Yes. Medicare's clinician data says Marwan Massouh 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 Marwan Massouh?
- (419) 609-1112, as listed in official Medicare / NPI Registry data.
- What is Marwan Massouh's NPI number?
- 1508841669. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marwan Massouh works
Medicare's Facility Affiliation Data lists Marwan Massouh at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barrett Hospital & HealthcareDillon, MT · Critical Access Hospital · CCN 271318
- Deer Lodge Medical CenterDeer Lodge, MT · Critical Access Hospital · CCN 271314
- Firelands Regional Medical CenterSandusky, OH · Acute Care Hospital · CCN 360025
- Fisher-Titus HospitalNorwalk, OH · Acute Care Hospital · CCN 360065
- St James HospitalButte, MT · Acute Care Hospital · CCN 270017
Practice locations
Addresses where Marwan Massouh is enrolled with Medicare (CMS data updated 2026-10-02).
- 3004 Hayes AveSandusky, OH 44870 (419) 609‑1112
Group practices
Medicare enrollment lists Marwan Massouh as a member of this group (CMS data updated 2026-10-02).
- Northern Ohio Medical Specialists, LLC251 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Ohio
Clinicians with the same Medicare primary specialty in Ohio — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508841669 |
| 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