Philip Petersen, MD, PHD
NPI 1538797543 · Clinical Pathology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Philip Petersen, MD, PHD is a Clinical Pathology Physician provider in Los Angeles, CA (NPI 1538797543).
Provider details
- NPI number
- 1538797543
- Entity type
- Individual
- Primary specialty
- Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 189962 (CA)
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
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2020-03-27
- Last updated
- 2025-11-07
- Certified
- 2025-11-07
Frequently asked questions
- What is Philip Petersen's NPI number?
- Philip Petersen's National Provider Identifier (NPI) is 1538797543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Philip Petersen's specialty?
- Philip Petersen is listed in the NPPES registry with a primary specialty of Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Philip Petersen located?
- Philip Petersen's practice location on file with NPPES is 1200 N State St, Los Angeles, CA 90033-1029.
- What is Philip Petersen's phone number?
- The practice phone number listed in the NPPES registry for Philip Petersen is (626) 991-8927.
- Does Philip Petersen accept Medicare?
- Philip Petersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Philip Petersen's NPI active?
- Yes — Philip Petersen's NPI (1538797543) is active in the NPPES registry as of the last update on 2025-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.