Mark A. Janzen, M.D.
Diagnostic Radiology Physician · Tulsa, OK
Mark A. Janzen, M.D. is a diagnostic radiology physician with a practice address in Tulsa, Oklahoma, and NPI 1699758961, issued on Nov 21, 2005. Check the license (Oklahoma 18316, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Mark A. Janzen
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 18316 OK
Self-reported in NPPES; status is on the state search - Practice location
- 5801 E. 41St Street, Tulsa, OK 74135
- Phone
- (918) 934-8347
- Enumerated
- Nov 21, 2005
- Record last updated
- Aug 25, 2025
- Fax
- (918) 743-8552
- Medicaid ID
- 100224530A OK
- Medicare enrollment
- Enrolled (PECOS I20040317001380); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 5801 E. 41St Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Devin Arie, MDDiagnostic Radiology Physician1891089132
- Steven Ciglar, M.D.Diagnostic Radiology Physician1336334671
- Colby Coulson, MDDiagnostic Radiology Physician1215136361
- Michael Cross, M.D.Diagnostic Radiology Physician1265625347
- Matthew Ford, MDDiagnostic Radiology Physician1083731517
- John Kephart, D.O.Diagnostic Radiology Physician1649565821
Verify Mark A. Janzen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 18316Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Tulsa X-Ray Laboratory IncTulsa, OK
- Tulsa X-Ray Laboratory PLLCTulsa, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diagnostic Radiology Physician providers in Oklahoma
There are 404 diagnostic radiology physician records in Oklahoma.
Other diagnostic radiology physician records in Oklahoma
- Robin Acker, MDEdmond, OK1184692576
- Mukta Agrawal, M.D.Oklahoma City, OK1295043883
- Anum AhmedOklahoma City, OK1629771183
- Laith Alhyari, M.D.Oklahoma City, OK1104278688
- Anthony Alleman, M.D.Oklahoma City, OK1467591610
- Tate Allen, M.D.Tulsa, OK1558358168
- Rafel Alvarez, D.O.Oklahoma City, OK1215383005
- Charles Anderson, M.D.Tulsa, OK1528039872
- Joseph Andrezik, MDOklahoma City, OK1447216080
- Ann Archer, M.D.Oklahoma City, OK1396713624
Common questions
What is Mark A. Janzen, M.D.'s NPI number?
Mark A. Janzen, M.D.'s National Provider Identifier (NPI) is 1699758961, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Janzen, M.D. located?
The NPPES record lists a practice address at 5801 E. 41St Street, Tulsa, OK, 74135. Phone: (918) 934-8347. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Janzen, M.D.'s license?
NPPES lists Oklahoma license number 18316, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. 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. 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.