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Dr. William Thomas Riley, MD
NPI1639384118
- Part D claims, 2024
- 49
- Publications
- 1
- Industry payments
- $22
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 451 Chaucer St, Palo Alto, CA 94301-2202
- Practice phone
- Call (650) 740-2083
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Riley's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Thomas Riley is a psychiatrist in Palo Alto, California
Dr. Riley practices in Palo Alto, California.
Dr. Riley's NPI, 1639384118, was assigned on May 10, 2007. Dr. Riley holds California license G22128.
NPI and contact details
- NPI
- 1639384118NPI Registry (opens in a new tab)
- NPI enumeration date
- May 10, 2007
- NPI status
- Active
- Practice phone
- (650) 740-2083
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. William Thomas Riley's practice address is in Palo Alto, California
Dr. Riley's practice address in the NPI Registry is 451 Chaucer St, Palo Alto, CA 94301-2202. The practice phone is (650) 740-2083.
- NPI Registry address451 Chaucer St, Palo Alto, CA 94301-2202Phone(650) 740-2083
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. William Thomas Riley's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riley practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Riley's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Thomas Riley is one of 6,803 psychiatrists in California
Psychiatry is Dr. Riley's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Riley is licensed in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Psychiatrists near Dr. Riley
Counts of psychiatrists 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
Dr. William Thomas Riley wrote 49 Medicare Part D claims in 2024
In 2024, Dr. Riley wrote 49 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 25 of them, across 1 drug with 11 or more claims each, at $199 in total drug cost. In 2023, CMS named 65 claims across 3 drugs.
Part D claims, 202449
Drugs named by CMS1
Total drug cost$199
Dr. Riley's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 652024: 2562%
Drugs named by CMS: 1 in 2024, 3 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William Thomas Riley has 1 publication on record
Dmand AI links 1 paper to Dr. Riley. Dr. Riley's most frequent co-authors are Roberto Lewis-Fernandez, MD and Peter Weiden, MD.
Papers1
Dr. Riley's most frequent co-authors
Recent publications by Dr. Riley
See who Dr. Riley researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Riley works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William Thomas Riley received $22 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Riley from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Davol Inc. paid the most, $22.
Companies that paid Dr. Riley the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Thomas Riley's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Thomas Riley
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Thomas Riley's NPI number?
Dr. William Thomas Riley's NPI number is 1639384118. It was assigned on May 10, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. William Thomas Riley?
Dr. William Thomas Riley is a psychiatrist in Palo Alto, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. William Thomas Riley practice?
Dr. Riley practices at 451 Chaucer St, Palo Alto, CA 94301-2202.
What is Dr. William Thomas Riley's office phone number?
The practice phone on file for Dr. Riley is (650) 740-2083.
What is Dr. William Thomas Riley's medical license number?
Dr. Riley holds California license G22128.
What drugs does Dr. William Thomas Riley prescribe most?
In 2024 Medicare Part D data, Dr. Riley's most prescribed drugs by claims were Lorazepam.
Has Dr. William Thomas Riley received payments from drug or device companies?
CMS Open Payments shows $22 in general payments to Dr. Riley from 1 company from 2024 to 2024. The largest total came from Davol Inc.
How long has Dr. William Thomas Riley been practicing?
Dr. Riley's NPI was assigned in 2007.
Does Dr. William Thomas Riley do research?
Dmand AI links 1 publication to Dr. Riley.
Who does Dr. William Thomas Riley publish with?
Dr. Riley's most frequent co-authors are Roberto Lewis-Fernandez, MD (1 shared paper) and Peter Weiden, MD (1 shared paper).
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