John Tazelaar, M.D.
NPI 1265666960 · Molecular Genetic Pathology (Pathology) Physician · Royal Oak, MI
Enrolled with Medicare as Order and Referring Only - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tazelaar, M.D. is a Molecular Genetic Pathology (Pathology) Physician provider in Royal Oak, MI (NPI 1265666960).
Provider details
- NPI number
- 1265666960
- Entity type
- Individual
- Primary specialty
- Molecular Genetic Pathology (Pathology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD418559 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 2515 Liberty AvePittsburgh, PA 15222-4613Phone: (412) 224-6897
Registry dates
- Enumerated
- 2009-05-08
- Last updated
- 2021-06-30
- Certified
- 2021-06-30
Frequently asked questions
- What is John Tazelaar's NPI number?
- John Tazelaar's National Provider Identifier (NPI) is 1265666960, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tazelaar's specialty?
- John Tazelaar is listed in the NPPES registry with a primary specialty of Molecular Genetic Pathology (Pathology) Physician (Allopathic & Osteopathic Physicians).
- Where is John Tazelaar located?
- John Tazelaar's practice location on file with NPPES is 3601 W 13 Mile Rd, Royal Oak, MI 48073-6712.
- What is John Tazelaar's phone number?
- The practice phone number listed in the NPPES registry for John Tazelaar is (713) 338-1994.
- Does John Tazelaar accept Medicare?
- John Tazelaar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tazelaar's NPI active?
- Yes — John Tazelaar's NPI (1265666960) is active in the NPPES registry as of the last update on 2021-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.