Jacob Calvin Marcelo
Physician Assistant · Ontario, CA
Jacob Calvin Marcelo is a physician assistant with a practice address in Ontario, California, and NPI 1770469629, issued on Aug 14, 2025. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jacob Calvin Marcelo
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 3550 E Philadelphia St, Ontario, CA 91761
- Phone
- (909) 773-0022
- Enumerated
- Aug 14, 2025
- Record last updated
- Aug 14, 2025
- Medicare enrollment
- Enrolled (PECOS I20251024002198); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 3550 E Philadelphia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zahra AkberziePhysician Assistant1528959913
- Peter Aziz, R.P.T.Physical Therapist1760601793
- Teodoro Diaz, DOFamily Medicine Physician1437190113
Verify Jacob Calvin Marcelo 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
Bills Medicare through one group practice
- Izuchukwu Okpara MD IncValencia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jacob Calvin Marcelo among 14,451 physician assistant records in California
Jacob Calvin Marcelo is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 93% of them.
- NPI issued2025 · 93% of these records are older, 3% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2024 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 physician assistant records list a practice address in Ontario
They are 37 of the 5,375 NPPES records with a practice address in Ontario, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Ontario → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kevin BellOntario, CA 917611497159818
- Lauren BoldaOntario, CA 917611497286082
- Charmaine Collins-Cepeda, PA-COntario, CA 917611801054820
- Carly Erard, PAOntario, CA 917611205087699
- Marcus Harris, P.A-COntario, CA 917611134144876
- Sepideh Homayoni, PA-COntario, CA 917611003357955
- Carol Kwak, PA-COntario, CA 917611891303293
- Robert PedrozaOntario, CA 917611821832551
Common questions
What is Jacob Calvin Marcelo's NPI number?
Jacob Calvin Marcelo's National Provider Identifier (NPI) is 1770469629, issued on Aug 14, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Jacob Calvin Marcelo located?
The NPPES record lists a practice address at 3550 E Philadelphia St, Ontario, CA, 91761. Phone: (909) 773-0022. Providers update this record themselves, so call before visiting.
How can I verify Jacob Calvin Marcelo's license?
Search the California board that licenses this profession; the NPPES record confirms identity 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.