Dr. Benjamin A. Thomas, MD
- Medicare services, 2019
- 13
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 119
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 39400 Paseo Padre Pkwy, Fremont, CA 94538
- Practice phone
- Call (510) 784-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Thomas' 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. Benjamin A. Thomas is an emergency medicine physician in Fremont, California
Dr. Thomas practices at Fremont Medical Center in Fremont, California, part of Kaiser Permanente.
Dr. Thomas' NPI, 1134546039, was assigned on March 28, 2014. Dr. Thomas graduated from UCSF School of Medicine in 2014. Dr. Thomas' California license number on file is A141863.
- NPI
- 1134546039NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325320187
- NPI enumeration date
- March 28, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 784-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Benjamin A. Thomas practices at Fremont Medical Center in Fremont, California
Dr. Thomas' primary practice is Fremont Medical Center, at 39400 Paseo Padre Pkwy, Fremont, CA 94538 in Alameda County. The practice phone is (510) 784-4000.
- Fremont Medical Center39400 Paseo Padre Pkwy, Fremont, CA 94538 · Alameda CountyPhone(510) 784-4000
Source: Dmand AI Affiliation Data
Dr. Benjamin A. Thomas is affiliated with 2 sites of care and 2 medical groups
Dr. Thomas' primary practice is Fremont Medical Center in Fremont, California, part of Kaiser Permanente. Dr. Thomas is also affiliated with Alameda Health System - Highland Hospital. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Thomas to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Benjamin A. Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fremont Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Benjamin A. Thomas is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Thomas is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Thomas has a license on file in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Thomas
Counts of emergency medicine physicians 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. Benjamin A. Thomas billed Medicare for 13 services in 2019
CMS data shows 13 Medicare services from Dr. Thomas across 1 procedure code in 2019, for 11 Medicare patients. Medicare paid $1,204 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Thomas' Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 302019: 1357%
- Tests and treatments
- 2018: 162019: 0100%
Dr. Thomas compared with the California median for emergency medicine physicians, 2019
- Dr. Thomas
- California median
- Medicare services
- 13vs 26595% below
- Medicare patients
- 11vs 24395% below
- Part D claims
- 14vs 6277% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Thomas' most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Thomas?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thomas and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Benjamin A. Thomas treated 11 Medicare patients in 2024, average age 63
CMS counts 11 Medicare patients who saw Dr. Thomas in 2024. Their average risk score is 2.49, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Thomas' median patient age at 41, with 58% women.
Dr. Thomas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Benjamin A. Thomas wrote 119 Medicare Part D claims in 2024
In 2024, Dr. Thomas wrote 119 Medicare Part D claims for 71 patients. 90% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $131 in total drug cost. In 2023, CMS named 37 claims across 2 drugs.
Dr. Thomas' Part D claims by kind of drug, 2024
- Generic107 claims90%
- Brand-name and other12 claims10%
Dr. Thomas' 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.
Drug classes CMS tracks in Dr. Thomas' Part D claims, 2024
- Antibiotics24%29 of 119 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 372024: 1462%
Drugs named by CMS: 1 in 2024, 2 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
How Dr. Benjamin A. Thomas takes part in Medicare
Dr. Thomas accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Benjamin A. Thomas has 1 publication on record
Dmand AI links 1 paper to Dr. Thomas in 2017. Dr. Thomas' most frequent co-authors are Sophie D. Barbant, MD, Edward James Durant, MD and Arun Daulat Nagdev, MD.
Dr. Thomas' most frequent co-authors
- Sophie D. Barbant, MD1 shared paper
- Edward James Durant, MD1 shared paper
- Arun Daulat Nagdev, MD1 shared paper
Recent publications by Dr. Thomas
See who Dr. Thomas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Thomas works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Benjamin A. Thomas received $175 in industry payments from 2017 to 2024
CMS Open Payments shows 3 general payments to Dr. Thomas from 2 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 94% of the total. Nevro Corp. paid the most, $160.
General payments to Dr. Thomas by program year, 2017 to 2024
General payments to Dr. Thomas by kind, 2017 to 2024
- Food and beverage$16594%
- Travel and lodging$106%
Companies that paid Dr. Thomas the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Benjamin A. Thomas graduated from UCSF School of Medicine
Dr. Thomas graduated from UCSF School of Medicine in 2014.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Benjamin A. Thomas accepts plans from 2 insurance carriers
Dr. Thomas is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Thomas accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Benjamin A. Thomas'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Benjamin A. Thomas
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. Benjamin A. Thomas' NPI number?
Dr. Benjamin A. Thomas' NPI number is 1134546039. It was assigned on March 28, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Benjamin A. Thomas?
Dr. Benjamin A. Thomas is an emergency medicine physician in Fremont, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Benjamin A. Thomas practice?
Dr. Thomas practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. Dr. Thomas' primary practice is Fremont Medical Center in Fremont, California, part of Kaiser Permanente. Dmand AI also links Dr. Thomas to 1 medical group.
What is Dr. Benjamin A. Thomas' office phone number?
The practice phone on file for Dr. Thomas is (510) 784-4000.
What is Dr. Benjamin A. Thomas' medical license number?
Dr. Thomas' California license number on file is A141863.
Which hospitals is Dr. Benjamin A. Thomas affiliated with?
Dr. Thomas practices at Fremont Medical Center in Fremont, California. Dr. Thomas is also affiliated with Alameda Health System - Highland Hospital.
What medical group is Dr. Benjamin A. Thomas part of?
Dr. Thomas is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Thomas to 1 more medical group.
Does Dr. Benjamin A. Thomas accept Medicare?
Yes. CMS data shows Dr. Thomas billed Medicare for 13 services in 2019, and Dr. Thomas accepts Medicare assignment.
How many Medicare patients does Dr. Benjamin A. Thomas see?
CMS counts 11 Medicare patients who saw Dr. Thomas in 2024, with an average age of 63.
Is Dr. Benjamin A. Thomas board certified?
Yes. Dr. Thomas is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Benjamin A. Thomas bill to Medicare?
In 2019, Dr. Thomas' most billed Medicare services were emergency department visit (99284).
Where did Dr. Benjamin A. Thomas go to medical school?
Dr. Thomas graduated from UCSF School of Medicine in 2014.
What drugs does Dr. Benjamin A. Thomas prescribe most?
In 2024 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Naproxen.
Has Dr. Benjamin A. Thomas received payments from drug or device companies?
CMS Open Payments shows $175 in general payments to Dr. Thomas from 2 companies from 2017 to 2024. The largest total came from Nevro Corp.
How long has Dr. Benjamin A. Thomas been practicing?
Dr. Thomas graduated from medical school in 2014, 12 years ago.
Does Dr. Benjamin A. Thomas do research?
Dmand AI links 1 publication to Dr. Thomas.
Who does Dr. Benjamin A. Thomas publish with?
Dr. Thomas' most frequent co-authors are Sophie D. Barbant, MD (1 shared paper), Edward James Durant, MD (1 shared paper) and Arun Daulat Nagdev, MD (1 shared paper).
What insurance does Dr. Benjamin A. Thomas accept?
Dr. Thomas is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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