John Ondrejka, MD
NPI 1770543159 · Internal Medicine Physician · Mentor, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Ondrejka, MD is a Internal Medicine Physician provider in Mentor, OH (NPI 1770543159).
Provider details
- NPI number
- 1770543159
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 35-055148 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-28
- Last updated
- 2016-02-22
Frequently asked questions
- What is John Ondrejka's NPI number?
- John Ondrejka's National Provider Identifier (NPI) is 1770543159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ondrejka's specialty?
- John Ondrejka is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Ondrejka located?
- John Ondrejka's practice location on file with NPPES is 7956 Tyler Blvd, Mentor, OH 44060-4806.
- What is John Ondrejka's phone number?
- The practice phone number listed in the NPPES registry for John Ondrejka is (440) 716-1283.
- Does John Ondrejka accept Medicare?
- John Ondrejka is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Ondrejka's NPI active?
- Yes — John Ondrejka's NPI (1770543159) is active in the NPPES registry as of the last update on 2016-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.