Carol Haein Kwak, PA-C
Physician Assistant · Ontario, CA
Carol Haein Kwak, PA-C is a physician assistant with a practice address in Ontario, California, and NPI 1891303293, issued on Jul 21, 2020. Check the license (California 60516, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Carol Haein Kwak
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 60516 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3550 E Philadelphia St Ste 150, Ontario, CA 91761
- Phone
- (909) 773-0022
- Enumerated
- Jul 21, 2020
- Record last updated
- Jul 6, 2022
- Medicare enrollment
- Enrolled (PECOS I20230209001712); 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 Ste 150
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jun Hyeok ChoiPhysician Assistant1801713326
- Gregory Musselman, PA-CMedical Physician Assistant1659829513
Verify Carol Haein Kwak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 60516Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average physician assistant in 2024
703 Medicare Part D claims for 456 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin73 claims
- Cefdinir63 claims
- Methylprednisolone60 claims
- Amoxicillin-Clavulanate Potass55 claims
- Mupirocin47 claims
- Doxycycline Hyclate46 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.
Bills Medicare through one group practice
- Oneil Enterprises IncFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carol Haein Kwak among 14,451 physician assistant records in California
Carol Haein Kwak, PA-C 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 2020, is newer than 62% of them.
- NPI issued2020 · 62% of these records are older, 33% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2021 · median 2018 among the 7,214 with a school on file
- Record last updated2022 · 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
- Robert PedrozaOntario, CA 917611821832551
- Nicholas Pena, PA-COntario, CA 917611083176077
Common questions
What is Carol Haein Kwak, PA-C's NPI number?
Carol Haein Kwak, PA-C's National Provider Identifier (NPI) is 1891303293, issued on Jul 21, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Carol Haein Kwak, PA-C located?
The NPPES record lists a practice address at 3550 E Philadelphia St Ste 150, Ontario, CA, 91761. Phone: (909) 773-0022. Providers update this record themselves, so call before visiting.
How can I verify Carol Haein Kwak, PA-C's license?
NPPES lists California license number 60516, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Carol Haein Kwak, PA-C prescribe under Medicare Part D?
In 2024, Carol Haein Kwak, PA-C had 703 Medicare Part D claims for 456 beneficiaries; the average among physician assistant prescribers was 830. 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.