Michael Craig Diem, MD
Family Medicine Physician · Westlake, OH
Michael Craig Diem, MD is a family medicine physician with a practice address in Westlake, Ohio, and NPI 1730360991, issued on Nov 16, 2007. Check the license (Ohio 35-08-3221, as entered in NPPES) on the State Medical Board of Ohio; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Michael Craig Diem
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 35-08-3221 OH
Self-reported in NPPES; status is on the state search - Practice location
- 850 Columbia RD, Westlake, OH 44145
- Phone
- (216) 521-4200
- Enumerated
- Nov 16, 2007
- Record last updated
- Nov 16, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,606 in Ohio → Look up another NPI →
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Verify Michael Craig Diem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35-08-3221Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Michael Craig Diem among 5,606 family medicine physician records in Ohio
Michael Craig Diem, 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 not. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 40% newer
- In a Medicare fileNo · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 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).
38 family medicine physician records list a practice address in Westlake
They are 38 of the 1,749 NPPES records with a practice address in Westlake, and 5,606 family medicine physician records in Ohio. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,606 in Ohio → Every provider in Westlake → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Matthew Blazek, M.D.Westlake, OH 441451053317248
- James Corpus, M.D.Westlake, OH 441451801862586
- Michael Grusenmeyer, M.D.Westlake, OH 441451407826910
- Brant Holtzmeier, D.OWestlake, OH 441451760460356
- Julie Kayes, MDWestlake, OH 441451043280761
- Jason Komitau, M.D.Westlake, OH 441451356340152
- Robert Krajcik, MDWestlake, OH 441451003886755
- Lawrence Lief, DOWestlake, OH 441451114929080
Common questions
What is Michael Craig Diem, MD's NPI number?
Michael Craig Diem, MD's National Provider Identifier (NPI) is 1730360991, issued on Nov 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael Craig Diem, MD located?
The NPPES record lists a practice address at 850 Columbia RD, Westlake, OH, 44145. Phone: (216) 521-4200. Providers update this record themselves, so call before visiting.
How can I verify Michael Craig Diem, MD's license?
NPPES lists Ohio license number 35-08-3221, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.