Dr. Brian R. Willis, MD
- Part D claims, 2024
- 13
- Industry payments
- $132
- Affiliated sites
- 1
- Medical groups
- 3
- State licenses
- 2
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Dr. Willis' 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. Brian R. Willis is a hepatology physician in Campbell, California
Dr. Willis practices at Signify Health in Campbell, California.
Dr. Willis' NPI, 1902913288, was assigned on August 24, 2006. Dr. Willis holds Alaska license 204276.
- NPI
- 1902913288NPI Registry (opens in a new tab)
- NPI enumeration date
- August 24, 2006
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Brian R. Willis practices at Signify Health in Campbell, California
Dr. Willis' primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Brian R. Willis is affiliated with 2 sites of care and 3 medical groups
Dr. Willis' primary practice is Signify Health in Campbell, California. The medical group on file is Signify Health. Dmand AI also links Dr. Willis to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Brian R. Willis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Willis practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Brian R. Willis is one of 41 hepatology physicians in California
Hepatology is Dr. Willis' primary specialty in the NPI Registry, under taxonomy code 207RI0008X. Dmand AI has Dr. Willis' licenses on file in 2 states: Alaska and Oregon.
Specialties and state licenses
- Hepatology, AlaskaPrimary
- Gastroenterology, Oregon
Hepatology physicians near Dr. Willis
Counts of hepatology 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. Brian R. Willis' patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Willis' median patient age at 74, with 43% women.
Dr. Willis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women43%
- Men57%
Source: Dmand AI Patient Panel Data
Dr. Brian R. Willis wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Willis wrote 13 Medicare Part D claims. They cover 16 drugs, with $369,514 in total drug cost. In 2020, CMS named 660 claims across 16 drugs.
Dr. Willis' most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 6602021: 52321%
Drugs named by CMS: 16 in 2021, 16 in 2020.
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. Brian R. Willis received $132 in industry payments from 2019 to 2025
CMS Open Payments shows 3 general payments to Dr. Willis from 3 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $100.
General payments to Dr. Willis by program year, 2019 to 2025
Companies that paid Dr. Willis the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Brian R. Willis'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. Brian R. Willis
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. Brian R. Willis' NPI number?
Dr. Brian R. Willis' NPI number is 1902913288. It was assigned on August 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian R. Willis?
Dr. Brian R. Willis is a hepatology physician in Campbell, California. The primary specialty in the NPI Registry is Hepatology Physician (taxonomy code 207RI0008X).
Where does Dr. Brian R. Willis practice?
Dr. Willis practices at 900 E Hamilton Ave, Campbell, CA 95008. Dr. Willis' primary practice is Signify Health in Campbell, California. Dmand AI also links Dr. Willis to 2 medical groups and 1 group practice or clinic.
What is Dr. Brian R. Willis' office phone number?
The practice phone on file for Dr. Willis is (469) 466-7007.
What is Dr. Brian R. Willis' medical license number?
Dr. Willis holds Alaska license 204276, one of the licenses on file in 2 states.
Which states has Dr. Brian R. Willis been licensed in?
Dmand AI has state licenses on file for Dr. Willis in Alaska and Oregon.
What medical group is Dr. Brian R. Willis part of?
Dr. Willis is linked to Signify Health. Dmand AI links Dr. Willis to 2 more medical groups.
What drugs does Dr. Brian R. Willis prescribe most?
In 2021 Medicare Part D data, Dr. Willis' most prescribed drugs by claims were Tacrolimus, Entecavir and Xifaxan.
Has Dr. Brian R. Willis received payments from drug or device companies?
CMS Open Payments shows $132 in general payments to Dr. Willis from 3 companies from 2019 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Brian R. Willis been practicing?
Dr. Willis graduated from medical school in 1981, 45 years ago.
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