Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. Mark A Janzen, MD

Individual provider Diagnostic Radiology Physician · NPI 1699758961

Mr. Mark A Janzen, MD is a Diagnostic Radiology in Tulsa, Oklahoma. Qualified in 1985, 41 years ago. Practices with Tulsa X-Ray Laboratory Inc, a 30-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
41
Licensed in
OK
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5801 E 41st St Ste 900
Tulsa, OK 74135-5631
Phone: (918) 934-8347
Fax: (918) 743-8552
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 18316 (OK)

Record details

NPI number1699758961
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 21, 2005
Last updated in NPPESAugust 25, 2025
Mailing addressPo Box 4930, Tulsa, OK 74159-0930

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Group practice Tulsa X-Ray Laboratory Inc — 30 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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