Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mazen Allouni, MD

Individual provider Internal Medicine Physician · NPI 1255070991

Mazen Allouni, MD is an Internal Medicine in Cleveland, Ohio. Qualified in 2003, 23 years ago. Practices with University Hospitals Medical Group Inc, a 2,242-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
23
Licensed in
OH
In the registry since
2022
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2351 E 22nd St
Cleveland, OH 44115-3111
Phone: (216) 861-6200
Fax: (216) 363-7490
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 57.253763 (OH)

Record details

NPI number1255070991
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 1, 2022
Last updated in NPPESJune 7, 2022
Certification dateJune 7, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice University Hospitals Medical Group Inc — 2242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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