Quick answers
- Where does Mark N. Youssef see patients?
- Medicare's clinician data lists 1 practice location in Cincinnati, OH. Call before your visit to confirm the address.
- What is Mark N. Youssef's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Mark N. Youssef accept Medicare assignment?
- Yes. Medicare's clinician data says Mark N. Youssef 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 Mark N. Youssef?
- (513) 347-9999, as listed in official Medicare / NPI Registry data.
- What is Mark N. Youssef's NPI number?
- 1508203209. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark N. Youssef is enrolled with Medicare (CMS data updated 2026-10-02).
- 1508 John StCincinnati, OH 45214 (513) 347‑9999
Group practices
Medicare enrollment lists Mark N. Youssef as a member of this group (CMS data updated 2026-10-02).
- Mercy Health Physicians Cincinnati LLC190 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Cincinnati
Clinicians with the same Medicare primary specialty in Cincinnati, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Louisville School Of Medicine |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508203209 |
| 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
- 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