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

Mike A Leonis, MD, PHD

Individual provider Pediatric Gastroenterology Physician · NPI 1669402087

Mike A Leonis, MD, PHD is a Gastroenterology in Cleveland, Ohio. Graduated from Washington University School of Medicine in 1996, 30 years ago. Practices with Cleveland Clinic, a 6,935-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
30
Trained at
Washington University School of Medicine
Licensed in
OH
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

9500 Euclid Ave # R3
Cleveland, OH 44195-0001
Phone: (216) 445-5893
Fax: (216) 444-2974
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Transplant Hepatology Physician (primary) Taxonomy 2080T0004X · Licence 35.079553 (OH)
Pediatric Gastroenterology Physician Taxonomy 2080P0206X · Licence 35.079553 (OH)

Record details

NPI number1669402087
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedJuly 3, 2006
Last updated in NPPESOctober 28, 2021
Certification dateOctober 28, 2021
Mailing address9500 Euclid Ave # R3, Cleveland, OH 44195-0001

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Cleveland Clinic — 6935 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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