Dr. Thomas P. Twaddell, MD
- Part D claims, 2024
- 34
- Hospital affiliations
- 1
- Industry payments
- $13,606
- State license
- 1
- Year NPI issued
- 2011
- Practice address
- 601 Duboce Avenue, San Francisco, CA 94117
- Practice phone
- Call (415) 600-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Twaddell's professional email, personal email and mobile number
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Dr. Thomas P. Twaddell is a gastroenterologist in San Francisco, California
Dr. Twaddell practices at California Pacific Medical Center Davies Campus in San Francisco, California, part of Sutter Health.
Dr. Twaddell's NPI, 1760751176, was assigned on December 14, 2011. Dr. Twaddell holds California license CFE28737.
- NPI
- 1760751176NPI Registry (opens in a new tab)
- NPI enumeration date
- December 14, 2011
- NPI status
- Active
- Practice phone
- (415) 600-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas P. Twaddell practices at California Pacific Medical Center Davies Campus in San Francisco, California
Dr. Twaddell's primary practice is California Pacific Medical Center Davies Campus, at 601 Duboce Avenue, San Francisco, CA 94117 in San Francisco County. The practice phone is (415) 600-6000.
- California Pacific Medical Center Davies Campus601 Duboce Avenue, San Francisco, CA 94117 · San Francisco CountyPhone(415) 600-6000
Source: Dmand AI Affiliation Data
Dr. Thomas P. Twaddell is affiliated with 1 site of care
Dr. Twaddell's primary practice is California Pacific Medical Center Davies Campus in San Francisco, California, part of Sutter Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas P. Twaddell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Twaddell practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| California Pacific Medical Center Davies Campus | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas P. Twaddell is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Twaddell's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Twaddell is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Twaddell
Counts of gastroenterologists 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. Thomas P. Twaddell's patients have a median age of 87
Across all payers, Dmand AI patient panel data puts Dr. Twaddell's median patient age at 87, with 50% women.
Dr. Twaddell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 87
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Thomas P. Twaddell wrote 34 Medicare Part D claims in 2024
In 2024, Dr. Twaddell wrote 34 Medicare Part D claims. 68% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $6,435 in total drug cost. In 2018, CMS named 14 claims across 1 drug.
Dr. Twaddell's Part D claims by kind of drug, 2024
- Generic23 claims68%
- Brand-name11 claims32%
Dr. Twaddell'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, 2018 to 2024
- 2018
- 2024
- Claims for drugs CMS names
- 2018: 142024: 1121%
Drugs named by CMS: 1 in 2024, 1 in 2018.
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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Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Thomas P. Twaddell received $13,606 in industry payments from 2017 to 2023
CMS Open Payments shows 7 general payments to Dr. Twaddell from 4 drug and device companies from 2017 to 2023. Consulting fees make up the largest share, 99% of the total. Theravance Biopharma, Inc. paid the most, $13,467.
General payments to Dr. Twaddell by program year, 2017 to 2023
General payments to Dr. Twaddell by kind, 2017 to 2023
- Consulting fees$13,46799%
- Food and beverage$1011%
- Education$380%
Companies that paid Dr. Twaddell the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas P. Twaddell'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel 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) |
| 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. Thomas P. Twaddell
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. Thomas P. Twaddell's NPI number?
Dr. Thomas P. Twaddell's NPI number is 1760751176. It was assigned on December 14, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas P. Twaddell?
Dr. Thomas P. Twaddell is a gastroenterologist in San Francisco, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Thomas P. Twaddell practice?
Dr. Twaddell practices at 601 Duboce Avenue, San Francisco, CA 94117. Dr. Twaddell's primary practice is California Pacific Medical Center Davies Campus in San Francisco, California, part of Sutter Health.
What is Dr. Thomas P. Twaddell's office phone number?
The practice phone on file for Dr. Twaddell is (415) 600-6000.
What is Dr. Thomas P. Twaddell's medical license number?
Dr. Twaddell holds California license CFE28737.
Which hospitals is Dr. Thomas P. Twaddell affiliated with?
Dr. Twaddell practices at California Pacific Medical Center Davies Campus in San Francisco, California.
What drugs does Dr. Thomas P. Twaddell prescribe most?
In 2024 Medicare Part D data, Dr. Twaddell's most prescribed drugs by claims were Eliquis.
Has Dr. Thomas P. Twaddell received payments from drug or device companies?
CMS Open Payments shows $13,606 in general payments to Dr. Twaddell from 4 companies from 2017 to 2023. The largest total came from Theravance Biopharma, Inc.
How long has Dr. Thomas P. Twaddell been practicing?
Dr. Twaddell's NPI was assigned in 2011.
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