Dr. John B. Simpson, MD
- Industry payments
- $1,097
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 2900 Whipple Ave, Redwood City, CA 94062-2843
- Practice phone
- Call (650) 306-2300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cardiovascular Medicine And Coronary Interventions, A Med
Medical specialty practice · Redwood City, California
Find Dr. Simpson'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. John B. Simpson is a cardiologist in Redwood City, California
Dr. Simpson practices at Cardiovascular Medicine And Coronary Interventions, A Med in Redwood City, California.
Dr. Simpson's NPI, 1356395263, was assigned on May 22, 2006. Dr. Simpson graduated from Duke University School Of Medicine in 1975. Dr. Simpson holds California license G33266.
- NPI
- 1356395263NPI Registry (opens in a new tab)
- NPI enumeration date
- May 22, 2006
- NPI status
- Active
- Practice phone
- (650) 306-2300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John B. Simpson practices at Cardiovascular Medicine and Coronary Interventions, A Med in Redwood City, California
Dr. Simpson's primary practice is Cardiovascular Medicine and Coronary Interventions, A Med, at 2900 Whipple Ave, Redwood City, CA 94062-2843. The practice phone is (650) 306-2300.
- Cardiovascular Medicine and Coronary Interventions, A Med2900 Whipple Ave, Redwood City, CA 94062-2843Phone(650) 306-2300
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John B. Simpson is affiliated with 1 site of care and 1 medical group
Dr. Simpson's primary practice is Cardiovascular Medicine And Coronary Interventions, A Med in Redwood City, California. Dmand AI also links Dr. Simpson to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John B. Simpson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simpson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cardiovascular Medicine And Coronary Interventions, A Med | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John B. Simpson is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. Simpson's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Simpson is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Simpson's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
- North Carolina license
Cardiologists near Dr. Simpson
Counts of cardiologists 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. John B. Simpson received $1,097 in industry payments from 2016 to 2025
CMS Open Payments shows 16 general payments to Dr. Simpson from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Avinger Inc. paid the most, $788.
General payments to Dr. Simpson by program year, 2016 to 2025
Companies that paid Dr. Simpson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John B. Simpson graduated from Duke University School Of Medicine
Dr. Simpson graduated from Duke University School Of Medicine in 1975.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. John B. Simpson'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. John B. Simpson
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. John B. Simpson's NPI number?
Dr. John B. Simpson's NPI number is 1356395263. It was assigned on May 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John B. Simpson?
Dr. John B. Simpson is a cardiologist in Redwood City, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. John B. Simpson practice?
Dr. Simpson practices at 2900 Whipple Ave, Redwood City, CA 94062-2843. Dr. Simpson's primary practice is Cardiovascular Medicine And Coronary Interventions, A Med in Redwood City, California. Dmand AI also links Dr. Simpson to 1 medical group.
What is Dr. John B. Simpson's office phone number?
The practice phone on file for Dr. Simpson is (650) 306-2300.
What is Dr. John B. Simpson's medical license number?
Dr. Simpson holds California license G33266, one of the licenses on file in 2 states.
Which states has Dr. John B. Simpson been licensed in?
Dmand AI has state licenses on file for Dr. Simpson in California (1976 to 2026) and North Carolina (1975 to 2006).
Is Dr. John B. Simpson board certified?
Yes. Dr. Simpson is board certified in cardiovascular disease by the American Board of Internal Medicine.
Where did Dr. John B. Simpson go to medical school?
Dr. Simpson graduated from Duke University School Of Medicine in 1975.
Has Dr. John B. Simpson received payments from drug or device companies?
CMS Open Payments shows $1,097 in general payments to Dr. Simpson from 5 companies from 2016 to 2025. The largest total came from Avinger Inc.
How long has Dr. John B. Simpson been practicing?
Dr. Simpson graduated from medical school in 1975, 51 years ago.
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