Dr. John Allison Duncan III, MD
- Publications
- 3
- Hospital affiliations
- 1
- Industry payments
- $326
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 700 Lawrence Expressway, Santa Clara, CA 95051
- Practice phone
- Call (408) 236-6400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Duncan'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 Allison Duncan III is a neurosurgeon in Santa Clara, California
Dr. Duncan practices at Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente.
Dr. Duncan's NPI, 1932186632, was assigned on December 23, 2005. Dr. Duncan graduated from Rutgers Robert Wood Johnson Medical School in 1986. Dr. Duncan's Rhode Island license number on file is MD08811.
- NPI
- 1932186632NPI Registry (opens in a new tab)
- NPI enumeration date
- December 23, 2005
- NPI status
- Active
- Practice phone
- (408) 236-6400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Allison Duncan III practices at Santa Clara Medical Center in Santa Clara, California
Dr. Duncan's primary practice is Santa Clara Medical Center, at 700 Lawrence Expressway, Santa Clara, CA 95051 in Santa Clara County. The practice phone is (408) 236-6400.
- Santa Clara Medical Center700 Lawrence Expressway, Santa Clara, CA 95051 · Santa Clara CountyPhone(408) 236-6400
Source: Dmand AI Affiliation Data
Dr. John Allison Duncan III is affiliated with 1 site of care and 1 medical group
Dr. Duncan's primary practice is Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Allison Duncan III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duncan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Clara Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Allison Duncan III is one of 846 neurosurgeons in California
Neurological surgery is Dr. Duncan's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Duncan is board certified in neurological surgery by the American Board of Neurological Surgery. Dmand AI has Dr. Duncan's licenses on file in 5 states: Rhode Island, California, Montana, Maryland and District of Columbia.
Specialties and state licenses
- Neurological surgery, Rhode IslandPrimary
- California license
- Montana license
- Maryland license
- District of Columbia license
Neurosurgeons near Dr. Duncan
Counts of neurosurgeons 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 Allison Duncan III's patients have a median age of 8
Across all payers, Dmand AI patient panel data puts Dr. Duncan's median patient age at 8, with 42% women.
Dr. Duncan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 8
Patient panel by sex, all payers
- Women42%
- Men58%
Source: Dmand AI Patient Panel Data
Dr. John Allison Duncan III has 3 publications on record
Dmand AI links 3 papers to Dr. Duncan, published from 2018 to 2020. Dr. Duncan's most frequent co-authors are Mark F. Sedrak, MD, Elena Sherman Call, MD and Gerald Arthur Grant, MD.
Dr. Duncan's most frequent co-authors
- Mark F. Sedrak, MD2 shared papers
- Elena Sherman Call, MD1 shared paper
- Gerald Arthur Grant, MD1 shared paper
Recent publications by Dr. Duncan
Oper Neurosurg (Hagerstown)
See who Dr. Duncan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duncan works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Allison Duncan III received $326 in industry payments from 2017 to 2022
CMS Open Payments shows 5 general payments to Dr. Duncan from 4 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. Medtronic USA, Inc. paid the most, $177.
General payments to Dr. Duncan by program year, 2017 to 2022
Companies that paid Dr. Duncan the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Allison Duncan III graduated from Rutgers Robert Wood Johnson Medical School
Dr. Duncan graduated from Rutgers Robert Wood Johnson Medical School in 1986. Dr. Duncan is a member of CNS.
- Medical school
- Board certified in neurological surgery
Source: Dmand AI Professional Profile Data
Dr. John Allison Duncan III accepts plans from 2 insurance carriers
Dr. Duncan is in network with 2 carriers, including Kaiser Permanente and RI State Medicaid. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- RI State Medicaid
Plan types Dr. Duncan accepts, by number of carriers
- EPO1
- HMO1
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Allison Duncan III'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 |
| 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. John Allison Duncan III
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 Allison Duncan III's NPI number?
Dr. John Allison Duncan III's NPI number is 1932186632. It was assigned on December 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Allison Duncan III?
Dr. John Allison Duncan III is a neurosurgeon in Santa Clara, California. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. John Allison Duncan III practice?
Dr. Duncan practices at 700 Lawrence Expressway, Santa Clara, CA 95051. Dr. Duncan's primary practice is Santa Clara Medical Center in Santa Clara, California, part of Kaiser Permanente.
What is Dr. John Allison Duncan III's office phone number?
The practice phone on file for Dr. Duncan is (408) 236-6400.
What is Dr. John Allison Duncan III's medical license number?
Dr. Duncan's Rhode Island license number on file is MD08811, one of the licenses on file in 5 states.
Which states has Dr. John Allison Duncan III been licensed in?
Dmand AI has state licenses on file for Dr. Duncan in Rhode Island (1995 to 2014), California (2008 to 2026), Montana (2008 to 2014), Maryland (1994 to 2000) and District of Columbia (1993 to 1997).
Which hospitals is Dr. John Allison Duncan III affiliated with?
Dr. Duncan practices at Santa Clara Medical Center in Santa Clara, California.
What medical group is Dr. John Allison Duncan III part of?
Dr. Duncan is linked to The Permanente Medical Group, Inc.
Is Dr. John Allison Duncan III board certified?
Yes. Dr. Duncan is board certified in neurological surgery by the American Board of Neurological Surgery.
Where did Dr. John Allison Duncan III go to medical school?
Dr. Duncan graduated from Rutgers Robert Wood Johnson Medical School in 1986.
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Has Dr. John Allison Duncan III received payments from drug or device companies?
CMS Open Payments shows $326 in general payments to Dr. Duncan from 4 companies from 2017 to 2022. The largest total came from Medtronic USA, Inc.
How long has Dr. John Allison Duncan III been practicing?
Dr. Duncan graduated from medical school in 1986, 40 years ago.
Does Dr. John Allison Duncan III do research?
Dmand AI links 3 publications to Dr. Duncan, published from 2018 to 2020.
Who does Dr. John Allison Duncan III publish with?
Dr. Duncan's most frequent co-authors are Mark F. Sedrak, MD (2 shared papers), Elena Sherman Call, MD (1 shared paper) and Gerald Arthur Grant, MD (1 shared paper).
What insurance does Dr. John Allison Duncan III accept?
Dr. Duncan is in network with 2 carriers, including Kaiser Permanente and RI State Medicaid. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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