Gary R. Chiswick, P.A.
Medical Physician Assistant · San Marcos, CA
Gary R. Chiswick, P.A. is a medical physician assistant with a practice address in San Marcos, California, and NPI 1174964001, issued on Jul 8, 2013. Check the license (California PA22667, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gary R. Chiswick
- Credential
- P.A.
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA22667 CA
Self-reported in NPPES; status is on the state search - Practice location
- 150 Valpreda RD, San Marcos, CA 92069
- Phone
- (760) 736-6780
- Enumerated
- Jul 8, 2013
- Record last updated
- Mar 12, 2024
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 150 Valpreda RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lynda Ariella, PHDClinical Psychologist1073518965
- Maria BanuelosCase Manager/Care Coordinator1720280589
Verify Gary R. Chiswick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA22667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average medical physician assistant in 2024
39 Medicare Part D claims for 22 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $15.43
1 payment: food and beverage; the largest payer was ViiV Healthcare Company. The 16,165 providers of this specialty with any payment received $1,055.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gary R. Chiswick among 3,376 medical physician assistant records in California
Gary R. Chiswick, P.A. is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 54% of them.
- NPI issued2013 · 54% of these records are older, 42% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in San Marcos → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Claudia Salazar, PA-SSan Marcos, CA 920691649906108
- Jamie Spence, PA-CSan Marcos, CA 920691518133032
- Jodi Tarutis, PA-CSan Marcos, CA 920691124138169
- Nicole Newcomb, PA-C, ASWSantee, CA 920711265864268
- Breanna Price, PA-CSantee, CA 920711235851056
- Kristen Trower, PHYSICIAN ASSISTANTSantee, CA 920711902149495
- Maria Aceves, PA-CPoway, CA 920641710973862
- Katherine Bradshaw-Smith, PHYSICIAN ASST CERTPoway, CA 920641235214602
Common questions
What is Gary R. Chiswick, P.A.'s NPI number?
Gary R. Chiswick, P.A.'s National Provider Identifier (NPI) is 1174964001, issued on Jul 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Gary R. Chiswick, P.A. located?
The NPPES record lists a practice address at 150 Valpreda RD, San Marcos, CA, 92069. Phone: (760) 736-6780. Providers update this record themselves, so call before visiting.
How can I verify Gary R. Chiswick, P.A.'s license?
NPPES lists California license number PA22667, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Gary R. Chiswick, P.A. prescribe under Medicare Part D?
In 2024, Gary R. Chiswick, P.A. had 39 Medicare Part D claims for 22 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.