Timothy Michael Preston, PA-C
Physician Assistant · Stanford, CA
Timothy Michael Preston, PA-C is a physician assistant with a practice address in Stanford, California, and NPI 1053956896, issued on Nov 15, 2019. Check the license (California 58034, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Timothy Michael Preston
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 58034 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Drive, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Nov 15, 2019
- Record last updated
- Dec 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20200617002806); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 300 Pasteur Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gita Abhiraman, MD, PHDStudent in an Organized Health Care Education/Training Program1477354579
- Alexa Allen, MDStudent in an Organized Health Care Education/Training Program1841057064
- Matthew Anderson, MDStudent in an Organized Health Care Education/Training Program1952104895
- Yarl Balachandran, MDStudent in an Organized Health Care Education/Training Program1063822179
- Hunter Bennett, PHDStudent in an Organized Health Care Education/Training Program1487356507
- Stanley Bradshaw, MSStudent in an Organized Health Care Education/Training Program1215518840
Verify Timothy Michael Preston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58034Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average physician assistant in 2024
189 Medicare Part D claims for 59 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 55 claims were for opioids.
Most prescribed
- Amoxicillin51 claims
- Oxycodone-Acetaminophen44 claims
- Meloxicam27 claims
- Celecoxib14 claims
- Ibuprofen12 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Timothy Michael Preston among 14,451 physician assistant records in California
Timothy Michael Preston, 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 2019, is newer than 56% of them.
- NPI issued2019 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2020 · 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).
480 physician assistant records list a practice address in Stanford
They are 480 of the 5,606 NPPES records with a practice address in Stanford, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Stanford → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jaclyn Bilello, PA-CStanford, CA 943051285695445
- Deanna Cully, PA-CStanford, CA 943051912967779
- Deborah Espinoza, PA-CStanford, CA 943051558361733
- Lorin Ferguson, PA-CStanford, CA 943051912972340
- John Laurence, PA-CStanford, CA 943051568445070
- David Miller, PA-CStanford, CA 943051538140413
- Irina Penev, PA-CStanford, CA 943051851361646
- Pamela Piacente-Rhodes, PA-CStanford, CA 943051598735227
Common questions
What is Timothy Michael Preston, PA-C's NPI number?
Timothy Michael Preston, PA-C's National Provider Identifier (NPI) is 1053956896, issued on Nov 15, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Michael Preston, PA-C located?
The NPPES record lists a practice address at 300 Pasteur Drive, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Timothy Michael Preston, PA-C's license?
NPPES lists California license number 58034, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Timothy Michael Preston, PA-C prescribe under Medicare Part D?
In 2024, Timothy Michael Preston, PA-C had 189 Medicare Part D claims for 59 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.