Dr. Thomas J. Maxwell, MD
- Industry payments
- $276
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 1505 Kensington Rd, San Marino, CA 91108-1925
- Practice phone
- Call (626) 449-2455
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Maxwell'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. Thomas J. Maxwell is an internist in San Marino, California
Dr. Maxwell practices in San Marino, California.
Dr. Maxwell's NPI, 1598806655, was assigned on February 10, 2007. Dr. Maxwell holds California license A24836.
- NPI
- 1598806655NPI Registry (opens in a new tab)
- NPI enumeration date
- February 10, 2007
- NPI status
- Active
- Practice phone
- (626) 449-2455
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Thomas J. Maxwell's practice address is in San Marino, California
Dr. Maxwell's practice address in the NPI Registry is 1505 Kensington Rd, San Marino, CA 91108-1925. The practice phone is (626) 449-2455.
- NPI Registry address1505 Kensington Rd, San Marino, CA 91108-1925Phone(626) 449-2455
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Thomas J. Maxwell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maxwell practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Maxwell's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas J. Maxwell is one of 16,751 internists in California
Internal medicine is Dr. Maxwell's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Maxwell is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Maxwell
Counts of internists 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 J. Maxwell's patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Maxwell's median patient age at 66, with 33% women.
Dr. Maxwell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women33%
- Men67%
Source: Dmand AI Patient Panel Data
Dr. Thomas J. Maxwell received $276 in industry payments from 2022 to 2025
CMS Open Payments shows 6 general payments to Dr. Maxwell from 4 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $184.
General payments to Dr. Maxwell by program year, 2022 to 2025
Companies that paid Dr. Maxwell the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas J. Maxwell'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 |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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 J. Maxwell
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 J. Maxwell's NPI number?
Dr. Thomas J. Maxwell's NPI number is 1598806655. It was assigned on February 10, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas J. Maxwell?
Dr. Thomas J. Maxwell is an internist in San Marino, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas J. Maxwell practice?
Dr. Maxwell practices at 1505 Kensington Rd, San Marino, CA 91108-1925.
What is Dr. Thomas J. Maxwell's office phone number?
The practice phone on file for Dr. Maxwell is (626) 449-2455.
What is Dr. Thomas J. Maxwell's medical license number?
Dr. Maxwell holds California license A24836.
Has Dr. Thomas J. Maxwell received payments from drug or device companies?
CMS Open Payments shows $276 in general payments to Dr. Maxwell from 4 companies from 2022 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Thomas J. Maxwell been practicing?
Dr. Maxwell's NPI was assigned in 2007.
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