Quick answers
- Which hospitals does Marc E. Guay work at?
- Medicare's official clinician data lists Marc E. Guay at 4 hospitals: Mercy Regional Medical Center, UH Cleveland Medical Center, UH St John Medical Center and University Hospitals - Elyria Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marc E. Guay see patients?
- Medicare's clinician data lists 1 practice location in Cleveland, OH. Call before your visit to confirm the address.
- What is Marc E. Guay's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does Marc E. Guay accept Medicare assignment?
- Yes. Medicare's clinician data says Marc E. Guay 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 Marc E. Guay?
- (216) 285-5041, as listed in official Medicare / NPI Registry data.
- What is Marc E. Guay's NPI number?
- 1770682973. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marc E. Guay works
Medicare's Facility Affiliation Data lists Marc E. Guay at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Regional Medical CenterLorain, OH · Acute Care Hospital · CCN 360172
- UH Cleveland Medical CenterCleveland, OH · Acute Care Hospital · CCN 360137
- UH St John Medical CenterWestlake, OH · Acute Care Hospital · CCN 360123
- University Hospitals - Elyria Medical CenterElyria, OH · Acute Care Hospital · CCN 360145
Practice locations
Addresses where Marc E. Guay is enrolled with Medicare (CMS data updated 2026-10-02).
- 11100 Euclid AveCleveland, OH 44106 (216) 285‑5041
Group practices
Medicare enrollment lists Marc E. Guay as a member of this group (CMS data updated 2026-10-02).
- University Primary Care Practices Inc1,079 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Cleveland
Clinicians with the same Medicare primary specialty in Cleveland, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770682973 |
| 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