Mark O'Connor, MD
Clinical Cardiac Electrophysiology Physician · Toledo, OH
Mark O'Connor, MD is a clinical cardiac electrophysiology physician with a practice address in Toledo, Ohio, and NPI 1245232800, issued on Aug 12, 2005. Check the license (Ohio 350721050, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Mark O'Connor
- Credential
- MD
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License number
- 350721050 OH
Self-reported in NPPES; status is on the state search - Practice location
- 2409 Cherry St, Toledo, OH 43608
- Phone
- (419) 251-3700
- Enumerated
- Aug 12, 2005
- Record last updated
- Feb 6, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (419) 251-3835
- Medicaid IDs
- 4140805 MI
2018846 OH - Medicare enrollment
- Enrolled (PECOS I20040416000393); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1986
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 169 in Ohio → Look up another NPI →
Also registered at 2409 Cherry St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammed Ahmed, M.D.Specialist1770575912
- Basem Alawneh, MDInterventional Cardiology Physician1003306366
- Syed Ali, MDCardiovascular Disease Physician1578787339
- Mohammed Alo, DOCardiovascular Disease Physician1447499462
- Kristi Bowser, DNP FNP-CFamily Nurse Practitioner1649280967
- Josie Bunstine, DOStudent in an Organized Health Care Education/Training Program1528862836
Verify Mark O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 350721050Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.0 times the Medicare Part D claims of the average clinical cardiac electrophysiology physician in 2024
8,553 Medicare Part D claims for 882 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Metoprolol Succinate647 claims
- Metoprolol Tartrate633 claims
- Eliquis610 claims
- Atorvastatin Calcium519 claims
- Furosemide422 claims
- Clopidogrel411 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Toledo Cardiology Consultants IncToledo, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark O'Connor among 169 clinical cardiac electrophysiology physician records in Ohio
Mark O'Connor, MD is one of 169 clinical cardiac electrophysiology physician records with a practice address in Ohio. 93% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 82% newer
- In a Medicare fileYes · 93% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated1986 · median 1999 among the 140 with a school on file
- Record last updated2009 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0001X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Ohio
There are 169 clinical cardiac electrophysiology physician records in Ohio.
All 169 in Ohio → Every provider in Toledo → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Timothy Phelan, MDToledo, OH 436061134388473
- Abhishek Maan, M.D., SCMToledo, OH 436141669604682
- Muhammad Talha Ayub, M.DToledo, OH 436151568814051
- Ryan Cunnane, M.D.Toledo, OH 436151841469517
- Vishal Goyal, M.DToledo, OH 436151205124898
- Omar Kahaly, M.D.Toledo, OH 436151124394564
- Jack Li, MDToledo, OH 436151508159435
- Kesari Sarikonda, MDToledo, OH 436151679571954
Common questions
What is Mark O'Connor, MD's NPI number?
Mark O'Connor, MD's National Provider Identifier (NPI) is 1245232800, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark O'Connor, MD located?
The NPPES record lists a practice address at 2409 Cherry St, Toledo, OH, 43608. Phone: (419) 251-3700. Providers update this record themselves, so call before visiting.
How can I verify Mark O'Connor, MD's license?
NPPES lists Ohio license number 350721050, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark O'Connor, MD prescribe under Medicare Part D?
In 2024, Mark O'Connor, MD had 8,553 Medicare Part D claims for 882 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.