Sarah Kay, PA
Physician Assistant · San Marcos, CA
Sarah Kay, PA is a physician assistant with a practice address in San Marcos, California, and NPI 1538634209, issued on Oct 9, 2018. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sarah Kay
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 150 Valpreda RD, San Marcos, CA 92069
- Phone
- (760) 736-6767
- Enumerated
- Oct 9, 2018
- Record last updated
- Jul 20, 2026
- Medicare enrollment
- Enrolled (PECOS I20210524001151); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 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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Verify Sarah Kay 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
44% fewer Medicare Part D claims than the average physician assistant in 2024
467 Medicare Part D claims for 356 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxycycline Hyclate76 claims
- Amoxicillin-Clavulanate Potass48 claims
- Cefuroxime39 claims
- Cephalexin30 claims
- Ofloxacin26 claims
- Nitrofurantoin Mono-Macro22 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
- Graybill Medical Group IncEscondido, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah Kay among 14,451 physician assistant records in California
Sarah Kay, PA 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 2018, is newer than 52% of them.
- NPI issued2018 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2019 · median 2018 among the 7,214 with a school on file
- Record last updated2026 · 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).
26 physician assistant records list a practice address in San Marcos
They are 26 of the 1,985 NPPES records with a practice address in San Marcos, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Marcos → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Geraldine Dodge, PASan Marcos, CA 920691639335771
- Meredith Heidenfeld, PA-CSan Marcos, CA 920691417954108
- Miriam Hernandez, PASan Marcos, CA 920691457903700
- Gabriela Juache-Velasco, PA-CSan Marcos, CA 920691043830763
- Matthew Kosel, PA-CSan Marcos, CA 920691316947302
- Jennifer Levine, PHYSICIAN ASSISTANT-San Marcos, CA 920691316109614
- William Mathias, PA-CSan Marcos, CA 920691285806323
- Jennifer Montgomery, PA-CSan Marcos, CA 920691568658698
Common questions
What is Sarah Kay, PA's NPI number?
Sarah Kay, PA's National Provider Identifier (NPI) is 1538634209, issued on Oct 9, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Kay, PA located?
The NPPES record lists a practice address at 150 Valpreda RD, San Marcos, CA, 92069. Phone: (760) 736-6767. Providers update this record themselves, so call before visiting.
How can I verify Sarah Kay, PA's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Sarah Kay, PA prescribe under Medicare Part D?
In 2024, Sarah Kay, PA had 467 Medicare Part D claims for 356 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.