Dr. John Joseph Ondrejka, MD
- Medicare services, 2020
- 14
- Part D claims, 2024
- 16
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 7956 Tyler Blvd, Mentor, OH 44060
- Practice phone
- Call (440) 255-6400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lake Health Tyler Urgent Care
Urgent Care Center · Mentor, Ohio
Find Dr. Ondrejka's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Joseph Ondrejka is an internist in Mentor, Ohio
Dr. Ondrejka practices at Lake Health Tyler Urgent Care in Mentor, Ohio.
Dr. Ondrejka's NPI, 1770543159, was assigned on March 28, 2006. Dr. Ondrejka holds Ohio license 35-055148.
- NPI
- 1770543159NPI Registry (opens in a new tab)
- NPI enumeration date
- March 28, 2006
- NPI status
- Active
- Practice phone
- (440) 255-6400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Joseph Ondrejka practices at Lake Health Tyler Urgent Care in Mentor, Ohio
Dr. Ondrejka's primary practice is Lake Health Tyler Urgent Care, at 7956 Tyler Blvd, Mentor, OH 44060. The practice phone is (440) 255-6400.
- Lake Health Tyler Urgent Care7956 Tyler Blvd, Mentor, OH 44060Phone(440) 255-6400
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Joseph Ondrejka is affiliated with 1 site of care and 1 medical group
Dr. Ondrejka's primary practice is Lake Health Tyler Urgent Care in Mentor, Ohio. The medical group on file is UH Lake Health Physician Group Middlefield Family Practice.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John Joseph Ondrejka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ondrejka practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lake Health Tyler Urgent Care | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Joseph Ondrejka is one of 4,708 internists in Ohio
Internal medicine is Dr. Ondrejka's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ondrejka is licensed in Ohio.
Specialties and state licenses
- Internal medicine, OhioPrimary
Internists near Dr. Ondrejka
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Joseph Ondrejka billed Medicare for 14 services in 2020
CMS data shows 14 Medicare services from Dr. Ondrejka across 1 procedure code in 2020, all of them office visits. Medicare paid $281 for them. Every service was in an office.
Dr. Ondrejka's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 1922020: 1493%
- Lab and pathology
- 2019: 362020: 0100%
Dr. Ondrejka compared with the Ohio median for internists, 2020
- Dr. Ondrejka
- Ohio median
- Medicare services
- 14vs 48797% below
- Part D claims
- 121vs 29459% below
Medians across 4,703 internists in Ohio with Dmand AI profiles that report each measure.
Dr. Ondrejka's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ondrejka and other internists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Joseph Ondrejka's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Ondrejka's median patient age at 56, with 46% women.
Dr. Ondrejka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women46%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. John Joseph Ondrejka wrote 16 Medicare Part D claims in 2024
In 2024, Dr. Ondrejka wrote 16 Medicare Part D claims. 81% of them were for generic drugs. They cover 6 drugs, with $957 in total drug cost. In 2018, CMS named 84 claims across 4 drugs.
Dr. Ondrejka's Part D claims by kind of drug, 2024
- Generic13 claims81%
- Brand-name and other3 claims19%
Dr. Ondrejka's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 842019: 12144%
Drugs named by CMS: 6 in 2019, 4 in 2018.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Dr. John Joseph Ondrejka's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Joseph Ondrejka
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Joseph Ondrejka's NPI number?
Dr. John Joseph Ondrejka's NPI number is 1770543159. It was assigned on March 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Joseph Ondrejka?
Dr. John Joseph Ondrejka is an internist in Mentor, Ohio. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Joseph Ondrejka practice?
Dr. Ondrejka practices at 7956 Tyler Blvd, Mentor, OH 44060. Dr. Ondrejka's primary practice is Lake Health Tyler Urgent Care in Mentor, Ohio.
What is Dr. John Joseph Ondrejka's office phone number?
The practice phone on file for Dr. Ondrejka is (440) 255-6400.
What is Dr. John Joseph Ondrejka's medical license number?
Dr. Ondrejka holds Ohio license 35-055148.
What medical group is Dr. John Joseph Ondrejka part of?
Dr. Ondrejka is linked to UH Lake Health Physician Group Middlefield Family Practice.
Does Dr. John Joseph Ondrejka accept Medicare?
Yes. CMS data shows Dr. Ondrejka billed Medicare for 14 services in 2020.
What services does Dr. John Joseph Ondrejka bill to Medicare?
In 2020, Dr. Ondrejka's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. John Joseph Ondrejka prescribe most?
In 2019 Medicare Part D data, Dr. Ondrejka's most prescribed drugs by claims were Amoxicillin, Cephalexin and Azithromycin.
How long has Dr. John Joseph Ondrejka been practicing?
Dr. Ondrejka's NPI was assigned in 2006.
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