Ernest John Buck, M.D.
Emergency Medicine Physician · Fremont, OH
Ernest John Buck, M.D. is an emergency medicine physician with a practice address in Fremont, Ohio, and NPI 1861504987, issued on Aug 31, 2006. Check the license (Ohio 35066347, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Ernest John Buck
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 35066347 OH
T1911 TX
Self-reported in NPPES; status is on the state search - Practice location
- 715 S Taft Ave, Fremont, OH 43420
- Phone
- (419) 334-6621
- Enumerated
- Aug 31, 2006
- Record last updated
- Feb 7, 2025
- Fax
- (419) 334-6649
- Medicare enrollment
- Enrolled (PECOS I20081104000687); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,002 in Ohio → Look up another NPI →
Also registered at 715 S Taft Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Suzanne Amidon Magro, D.O.Emergency Medicine Physician1407941198
- Iracema Arevalo, M.DPediatric Infectious Diseases Physician1962620294
- Matthew Barbour, PHARMDPharmacist1285167627
- Laraine Bauer, PTPhysical Therapist1356440044
- Patricia Beaschler, RPHPharmacist1750814992
- Bonnie Bowlus, PTPhysical Therapist1801985668
Verify Ernest John Buck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35066347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average emergency medicine physician in 2024
563 Medicare Part D claims for 275 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 83 claims were for opioids.
Most prescribed
- Prednisone58 claims
- Tramadol Hcl54 claims
- Ibuprofen48 claims
- Cephalexin37 claims
- Metoclopramide Hcl33 claims
- Ondansetron Odt30 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 3 group practices
- Epmg Southwest Michigan PLLCNiles, MI
- Harvey Emergency Physicians PLLCCalumet City, IL
- Midland Emergency Managers PLLCMidland, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ernest John Buck among 3,002 emergency medicine physician records in Ohio
Ernest John Buck, M.D. is one of 3,002 emergency medicine physician records with a practice address in Ohio. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 63% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1992 · median 2013 among the 1,720 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Ohio
There are 3,002 emergency medicine physician records in Ohio.
All 3,002 in Ohio → Every provider in Fremont → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Suzanne Amidon Magro, D.O.Fremont, OH 434201407941198
- Leilani Labianco, M.D.Fremont, OH 434201275550006
- Kristen Craig, M.D.Bowling Green, OH 434021154740827
- Marsha Cushman, DOBowling Green, OH 434021114981982
- Allison Glanz, CNPBowling Green, OH 434021386375327
- Srivarsha Koripella, MDBowling Green, OH 434021164928065
- John Lightfoot, MDBowling Green, OH 434021740348127
- Kevin Martin, M.D.Bowling Green, OH 434021952361297
Common questions
What is Ernest John Buck, M.D.'s NPI number?
Ernest John Buck, M.D.'s National Provider Identifier (NPI) is 1861504987, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ernest John Buck, M.D. located?
The NPPES record lists a practice address at 715 S Taft Ave, Fremont, OH, 43420. Phone: (419) 334-6621. Providers update this record themselves, so call before visiting.
How can I verify Ernest John Buck, M.D.'s license?
NPPES lists Ohio license number 35066347, 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 Ernest John Buck, M.D. prescribe under Medicare Part D?
In 2024, Ernest John Buck, M.D. had 563 Medicare Part D claims for 275 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.