John Yoonkeun Jun, M.D.
Endocrinology, Diabetes & Metabolism Physician · Toledo, OH
John Yoonkeun Jun, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Toledo, Ohio, and NPI 1487878559, issued on Apr 12, 2007. Check the license (Ohio 35.128476, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- John Yoonkeun Jun
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 35.128476 OH
MT187224 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 W Central Ave FL 2, Toledo, OH 43606
- Phone
- (567) 420-1600
- Enumerated
- Apr 12, 2007
- Record last updated
- Feb 10, 2026
- Fax
- (567) 420-1633
- Medicaid ID
- 0164737 OH
- Medicare enrollment
- Enrolled (PECOS I20160527001811); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 352 in Ohio → Look up another NPI →
Also registered at 2100 W Central Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Basil Akpunonu, M.D.Internal Medicine Physician1023003530
- Kaveh Fekri, MDStudent in an Organized Health Care Education/Training Program1952973711
- Rashmi Goyal, M.D.Internal Medicine Physician1336134535
- Srinivas Hejeebu, D.O.Internal Medicine Physician1154316354
- Juan Jaume, MDEndocrinology, Diabetes & Metabolism Physician1164498002
- Margo Joubran, PA-CPhysician Assistant1144819814
Verify John Yoonkeun Jun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35.128476Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
712 Medicare Part D claims for 164 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of claims.
Most prescribed
- Levothyroxine Sodium158 claims
- Methimazole65 claims
- Ozempic31 claims
- Alendronate Sodium27 claims
- Lantus Solostar23 claims
- Basaglar Kwikpen U-10021 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.
Industry payments in 2024: $87.25
4 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University OF Toledo Physicians LLCToledo, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Yoonkeun Jun among 352 endocrinology, diabetes & metabolism physician records in Ohio
John Yoonkeun Jun, M.D. is one of 352 endocrinology, diabetes & metabolism physician records with a practice address in Ohio. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 41% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1998 · median 2004 among the 255 with a school on file
- Record last updated2026 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Ohio
There are 352 endocrinology, diabetes & metabolism physician records in Ohio.
All 352 in Ohio → Every provider in Toledo → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Abdul-Badi Abou-Samra, M.D., PH.D.Toledo, OH 436061932195203
- Richard Beham, M.D.Toledo, OH 436061568468023
- Aparna Brown, M.D.Toledo, OH 436061174570337
- Jyoti Chakravarty, M.D.Toledo, OH 436061740286236
- Luis Gerstenmaier, M.D.Toledo, OH 436061528064029
- Abby Grisham, LSWToledo, OH 436061821535568
- Guillermo Guardia Gonzales, MDToledo, OH 436061902866387
- Bhaskar Gundabolu, M.D.Toledo, OH 436061346458767
Common questions
What is John Yoonkeun Jun, M.D.'s NPI number?
John Yoonkeun Jun, M.D.'s National Provider Identifier (NPI) is 1487878559, issued on Apr 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Yoonkeun Jun, M.D. located?
The NPPES record lists a practice address at 2100 W Central Ave FL 2, Toledo, OH, 43606. Phone: (567) 420-1600. Providers update this record themselves, so call before visiting.
How can I verify John Yoonkeun Jun, M.D.'s license?
NPPES lists Ohio license number 35.128476, 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 John Yoonkeun Jun, M.D. prescribe under Medicare Part D?
In 2024, John Yoonkeun Jun, M.D. had 712 Medicare Part D claims for 164 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.