Calvin Peter John, MD
Family Medicine Physician · London, OH
Calvin Peter John, MD is a family medicine physician with a practice address in London, Ohio, and NPI 1750332862, issued on May 13, 2006. Check the license (Ohio 35081241J, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Calvin Peter John
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 35081241J OH
Self-reported in NPPES; status is on the state search - Practice location
- 210 N Main St, London, OH 43140
- Phone
- (740) 852-1372
- Enumerated
- May 13, 2006
- Record last updated
- Jan 17, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid ID
- 2363580 OH
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,606 in Ohio → Look up another NPI →
Also registered at 210 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Isteaq Ahmed, M.D.Family Medicine Physician1245525765
- Abdal Rahman Alhyari, MBBSHospitalist Physician1205051570
- Erica BarbariFamily Nurse Practitioner1275904708
- Janice BersoffClinical Social Worker1427049493
- Bradford Cotton, MDEmergency Medicine Physician1306803994
- Brian CummingsPhysical Therapist1033904529
Verify Calvin Peter John in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35081241JCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
86 Medicare Part D claims for 51 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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.
Calvin Peter John among 5,606 family medicine physician records in Ohio
Calvin Peter John, MD is one of 5,606 family medicine physician records with a practice address in Ohio. 80% 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 18% of them.
- NPI issued2006 · 18% of these records are older, 48% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2013 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 family medicine physician records list a practice address in London
They are 11 of the 299 NPPES records with a practice address in London, and 5,606 family medicine physician records in Ohio.
All 5,606 in Ohio → Every provider in London → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Isteaq Ahmed, M.D.London, OH 431401245525765
- Zainab Al-Obosi, M.D.London, OH 431401093005274
- David Duff, MDLondon, OH 431401588669642
- Gary Erdy, MDLondon, OH 431401053487108
- James Kaehr, MDLondon, OH 431401184659708
- Rosalie Kuriakose, MDLondon, OH 431401699702571
- Elliot Neufeld, D.OLondon, OH 431401831562628
- Sally Passerby, MDLondon, OH 431401881957652
Common questions
What is Calvin Peter John, MD's NPI number?
Calvin Peter John, MD's National Provider Identifier (NPI) is 1750332862, issued on May 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Calvin Peter John, MD located?
The NPPES record lists a practice address at 210 N Main St, London, OH, 43140. Phone: (740) 852-1372. Providers update this record themselves, so call before visiting.
How can I verify Calvin Peter John, MD's license?
NPPES lists Ohio license number 35081241J, 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 Calvin Peter John, MD prescribe under Medicare Part D?
In 2024, Calvin Peter John, MD had 86 Medicare Part D claims for 51 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.