Mark Janzen, M.D.
NPI 1699758961 · Diagnostic Radiology Physician · Tulsa, OK
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Janzen, M.D. is a Diagnostic Radiology Physician provider in Tulsa, OK (NPI 1699758961).
Provider details
- NPI number
- 1699758961
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 18316 (OK)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,935 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 983 | $8 |
| Screening Mammography77067 | 690 | $33 |
| Screening 3d Breast Mammography77063 | 436 | $26 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 170 | $9 |
| Ct Scan Head Or Brain Without Contrast70450 | 73 | $37 |
| X-Ray of Abdomen, 1 View74018 | 66 | $8 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-21
- Last updated
- 2025-08-25
Frequently asked questions
- What is Mark Janzen's NPI number?
- Mark Janzen's National Provider Identifier (NPI) is 1699758961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Janzen's specialty?
- Mark Janzen is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Janzen located?
- Mark Janzen's practice location on file with NPPES is 5801 E. 41st Street, Tulsa, OK 74135-5631.
- What is Mark Janzen's phone number?
- The practice phone number listed in the NPPES registry for Mark Janzen is (918) 934-8347.
- Does Mark Janzen accept Medicare?
- Mark Janzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Janzen's NPI active?
- Yes — Mark Janzen's NPI (1699758961) is active in the NPPES registry as of the last update on 2025-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.