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

Dr. John Joseph Ondrejka, MD

Individual provider Internal Medicine Physician · NPI 1770543159

Dr. John Joseph Ondrejka, MD is an Internal Medicine Physician in Mentor, Ohio. Licensed in Ohio. Registered with an NPI since 2006.

Licensed in
OH
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

7956 Tyler Blvd
Mentor, OH 44060-4806
Phone: (440) 716-1283
Fax: (440) 716-1605
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 35-055148 (OH)

Record details

NPI number1770543159
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 28, 2006
Last updated in NPPESJuly 13, 2026

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