Marion Fedoruk, MD
NPI 1265500581 · Occupational Medicine Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marion Fedoruk, MD is a Occupational Medicine Physician provider in Irvine, CA (NPI 1265500581).
Provider details
- NPI number
- 1265500581
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 000000G39629 (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
19 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)
- Uci Medical Center101 the City Drive SouthOrange, CA 92868Phone: (714) 456-8978
Registry dates
- Enumerated
- 2006-12-04
- Last updated
- 2022-11-14
- Certified
- 2022-11-14
Frequently asked questions
- What is Marion Fedoruk's NPI number?
- Marion Fedoruk's National Provider Identifier (NPI) is 1265500581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marion Fedoruk's specialty?
- Marion Fedoruk is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marion Fedoruk located?
- Marion Fedoruk's practice location on file with NPPES is 19722 Macarthur Blvd, Irvine, CA 92612-2404.
- What is Marion Fedoruk's phone number?
- The practice phone number listed in the NPPES registry for Marion Fedoruk is (949) 824-8641.
- Does Marion Fedoruk accept Medicare?
- Marion Fedoruk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marion Fedoruk's NPI active?
- Yes — Marion Fedoruk's NPI (1265500581) is active in the NPPES registry as of the last update on 2022-11-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.