Marcia Carolyn Oen, PA-C, MPH
Surgical Physician Assistant · Whittier, CA
Marcia Carolyn Oen, PA-C, MPH is a surgical physician assistant with a practice address in Whittier, California, and NPI 1174098727, issued on Oct 10, 2018. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marcia Carolyn Oen
- Credential
- PA-C, MPH
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- Practice location
- 12401 Washington Blvd, Whittier, CA 90602
- Phone
- (562) 698-0811
- Enumerated
- Oct 10, 2018
- Record last updated
- Sep 10, 2025
- Fax
- (562) 789-5902
- Medicare enrollment
- Enrolled (PECOS I20251114001416); may accept Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 1,075 in California → Look up another NPI →
Also registered at 12401 Washington Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anas Abu-Khader, MDInternal Medicine Physician1881180784
- Johanna Aceves, NPNurse Practitioner1841415502
- Kariann Akiyama, MS, RDN, CNSCRegistered Dietitian1639870009
- Syed Ali, MDAnesthesiology Physician1295775625
- Jamee Ambariantz, PAPhysician Assistant1790726123
- Talin Azilazyan, PHARMDPharmacist1700739372
Verify Marcia Carolyn Oen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average surgical physician assistant in 2024
54 Medicare Part D claims for 27 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Oxycodone Hcl14 claims
- Chlorhexidine Gluconate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Marcia Carolyn Oen among 1,075 surgical physician assistant records in California
Marcia Carolyn Oen, PA-C, MPH is one of 1,075 surgical physician assistant records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 76% of them.
- NPI issued2018 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · median 2012 among the 649 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in California
There are 1,075 surgical physician assistant records in California.
All 1,075 in California → Every provider in Whittier → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Kris Denholm, PA-CWhittier, CA 906021245971118
- Lauren Fellion, PA-CWhittier, CA 906021154673523
- Adelbert-Marc Francisco, PA-CWhittier, CA 906021356992150
- Richard Hoang, P.A.-CWhittier, CA 906021164486296
- Lia Zappala, PA-CWhittier, CA 906051851998579
- Lonnie Chatman, P.A.La Habra, CA 906311497778591
- Chad Cooper, P.A.La Habra, CA 906311003839879
- Juan Alvarado, PA-CNorwalk, CA 906501285963678
Common questions
What is Marcia Carolyn Oen, PA-C, MPH's NPI number?
Marcia Carolyn Oen, PA-C, MPH's National Provider Identifier (NPI) is 1174098727, issued on Oct 10, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Marcia Carolyn Oen, PA-C, MPH located?
The NPPES record lists a practice address at 12401 Washington Blvd, Whittier, CA, 90602. Phone: (562) 698-0811. Providers update this record themselves, so call before visiting.
How can I verify Marcia Carolyn Oen, PA-C, MPH's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marcia Carolyn Oen, PA-C, MPH prescribe under Medicare Part D?
In 2024, Marcia Carolyn Oen, PA-C, MPH had 54 Medicare Part D claims for 27 beneficiaries; the average among surgical physician assistant prescribers was 304. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.