Timothy Michael Preston, PA-C

  • Stanford, CA
  • Physician assistant
NPI1053956896PAC ID0244652303
Medicare patients, 2024
21
Part D claims, 2024
189
Hospital affiliations
2
Industry payments
$14
Medical groups
3
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
Get professional email
Personal email
Get personal email
Mobile number
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Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 6 affiliations

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Timothy Michael Preston is a physician assistant in Stanford, California

Timothy Preston practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Timothy Preston's NPI, 1053956896, was assigned on November 15, 2019. Timothy Preston holds California license 58034.

NPI and contact details
Medicare PAC ID
0244652303
NPI enumeration date
November 15, 2019
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(650) 723-4000
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
32
Medical school graduation
2020

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Timothy Michael Preston practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Timothy Preston's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Source: Dmand AI Affiliation Data

Timothy Michael Preston is affiliated with 3 sites of care and 3 medical groups

Timothy Preston's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Timothy Preston to 1 more hospital, 2 medical groups and 1 group practice or clinic, each named with a free account. Timothy Preston's employer is on file too: a hospital.

See all 6 affiliations for Timothy Preston

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Timothy Michael Preston's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Timothy Preston practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Stanford Hospital at 300 Pasteur DriveAvailable with a free account
+2 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Timothy Michael Preston is one of 11,482 physician assistants in California

Physician assistant is Timothy Preston's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Timothy Preston is licensed in California.

Specialties and state licenses

  • Physician assistant, CaliforniaPrimaryLicense 58034 · taxonomy 363A00000X

Physician assistants near Timothy Preston

Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Timothy Michael Preston treated 21 Medicare patients in 2024, average age 72

CMS counts 21 Medicare patients who saw Timothy Preston in 2024. 75% of them have arthritis, and 75% have high cholesterol. Their average risk score is 0.74, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Timothy Preston's median patient age at 69, with 59% women.

Medicare patients, 202421
Average age72
Average risk score0.74

Chronic conditions among Timothy Preston's Medicare patients, 2024

  1. Arthritis75%
  2. High cholesterol75%
  3. High blood pressure52%

Share of Medicare patients with each condition. A patient can have several.

Timothy Preston's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 69

Patient panel by sex, all payers

  • Women59%
  • Men40%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Timothy Michael Preston wrote 189 Medicare Part D claims in 2024

In 2024, Timothy Preston wrote 189 Medicare Part D claims for 59 patients. 98% of them were for generic drugs.

Part D claims, 2024189
Part D patients59

Timothy Preston's Part D claims by kind of drug, 2024

  • Generic186 claims98%
  • Brand-name and other3 claims2%

Drug classes CMS tracks in Timothy Preston's Part D claims, 2024

  • Opioids29%55 of 189 claims
  • Antibiotics29%55 of 189 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data

Timothy Michael Preston offers telehealth to Medicare patients

Timothy Preston accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Timothy Preston as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Timothy Michael Preston received $14 in industry payments in 2025

CMS Open Payments shows 1 general payment to Timothy Preston from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Moximed, Inc paid the most, $14.

Companies that paid Timothy Preston the most, 2025 to 2025

Share is of all general payments to this clinician.

See all payments to Timothy Preston

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Timothy Michael Preston's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Timothy Michael Preston

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Timothy Michael Preston's NPI number?

Timothy Michael Preston's NPI number is 1053956896. It was assigned on November 15, 2019, and it is active in the NPI Registry.

What does Timothy Michael Preston specialize in?

Timothy Michael Preston is a physician assistant in Stanford, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does Timothy Michael Preston practice?

Timothy Preston practices at 300 Pasteur Drive, Stanford, CA 94305. Timothy Preston's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Timothy Preston to 1 hospital, 2 medical groups and 1 group practice or clinic.

What is Timothy Michael Preston's office phone number?

The practice phone on file for Timothy Preston is (650) 723-4000.

What is Timothy Michael Preston's medical license number?

Timothy Preston holds California license 58034.

Which hospitals is Timothy Michael Preston affiliated with?

Timothy Preston practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dmand AI links Timothy Preston to 1 more hospital.

What medical group is Timothy Michael Preston part of?

Timothy Preston is linked to Stanford Health Care. Dmand AI links Timothy Preston to 2 more medical groups.

Does Timothy Michael Preston accept Medicare?

Yes. CMS lists Timothy Preston as accepting Medicare assignment.

Does Timothy Michael Preston offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Timothy Preston as offering telehealth services.

How many Medicare patients does Timothy Michael Preston see?

CMS counts 21 Medicare patients who saw Timothy Preston in 2024, with an average age of 72.

Has Timothy Michael Preston received payments from drug or device companies?

CMS Open Payments shows $14 in general payments to Timothy Preston from 1 company from 2025 to 2025. The largest total came from Moximed, Inc.

How long has Timothy Michael Preston been practicing?

Timothy Preston graduated from medical school in 2020, 6 years ago.

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