Dr. David Jonathan Segar, MD
- Part D claims, 2017
- 13
- Publications
- 40
- MIPS score, 2024
- 87
- Industry payments
- $1,768
- Affiliated sites
- 1
- Practice address
- 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810
- Practice phone
- Call (415) 476-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave)
Multi-specialty group site · San Francisco, California
Find Dr. Segar'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. David Jonathan Segar is a neurosurgeon in San Francisco, California
Dr. Segar practices at University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California.
Dr. Segar's NPI, 1356703680, was assigned on March 25, 2016. Dr. Segar graduated from The Warren Alpert Medical School of Brown University in 2016. Dr. Segar's California license number on file is A185505.
- NPI
- 1356703680NPI Registry (opens in a new tab)
- NPI enumeration date
- March 25, 2016
- NPI status
- Active
- Practice phone
- (415) 476-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Jonathan Segar practices at 2 locations in San Francisco, California
Dr. Segar's primary practice is University of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave), at 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810. The practice phone is (415) 476-1000. The NPI Registry lists Dr. Segar's practice address as 505 Parnassus Ave, San Francisco, CA 94131.
- University of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave)Primary400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810Phone(415) 476-1000
- NPI Registry address505 Parnassus Ave, San Francisco, CA 94131 · San Francisco CountyPhone(415) 353-7500
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. David Jonathan Segar is affiliated with 1 site of care and 2 medical groups
Dr. Segar's primary practice is University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Segar to 1 more 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. David Jonathan Segar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Segar practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Jonathan Segar is one of 846 neurosurgeons in California
Neurological surgery is Dr. Segar's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dmand AI has Dr. Segar's licenses on file in 3 states: California, New York and Massachusetts.
Specialties and state licenses
- Neurological surgery, CaliforniaPrimary
- New York license
- Massachusetts license
Neurosurgeons near Dr. Segar
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. David Jonathan Segar wrote 13 Medicare Part D claims in 2017
In 2017, Dr. Segar wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $79 in total drug cost.
Dr. Segar's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. David Jonathan Segar scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Segar for performance year 2024, reported as part of a group.
Dr. Segar's MIPS scores, performance year 2024
- 87of 100Final score
- 86.8of 100Quality
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. David Jonathan Segar has 40 publications on record
Dmand AI links 40 papers to Dr. Segar, published from 2013 to 2025. 2020 was the busiest year, with 8. The most frequent topics are Magnetic Resonance Imaging, Essential Tremor and Neurosurgical Procedures. Dr. Segar has published most often in J Neurosurg. Dr. Segar's most frequent co-authors are Garth Rees Cosgrove, FRCSC, MD, Omar Arnaout, MD and Wael F. Asaad, MD, PhD.
Dr. Segar's papers by year, 2014 to 2025
Topics Dr. Segar writes about most
- Magnetic Resonance Imaging
- Essential Tremor
- Neurosurgical Procedures
- Deep Brain Stimulation
- Glasgow Coma Scale
- Parkinson Disease
- Postoperative Complications
- Thalamus
Dr. Segar's most frequent co-authors
- Garth Rees Cosgrove, FRCSC, MD10 shared papers
- Omar Arnaout, MD5 shared papers
- Wael F. Asaad, MD, PhD5 shared papers
Recent publications by Dr. Segar
See who Dr. Segar researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Segar 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. David Jonathan Segar received $1,768 in industry payments from 2023 to 2024
CMS Open Payments shows 10 general payments to Dr. Segar from 3 drug and device companies from 2023 to 2024. Travel and lodging make up the largest share, 64% of the total. ClearPoint Neuro, Inc. paid the most, $1,547.
General payments to Dr. Segar by program year, 2023 to 2024
General payments to Dr. Segar by kind, 2023 to 2024
- Travel and lodging$1,12664%
- Food and beverage$64236%
Companies that paid Dr. Segar the most, 2023 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David Jonathan Segar graduated from The Warren Alpert Medical School of Brown University
Dr. Segar graduated from The Warren Alpert Medical School of Brown University in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. David Jonathan Segar accepts plans from 4 insurance carriers
Dr. Segar is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Molina
Plan types Dr. Segar accepts, by number of carriers
- Medicare3
- PPO3
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. David Jonathan Segar'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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. David Jonathan Segar
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. David Jonathan Segar's NPI number?
Dr. David Jonathan Segar's NPI number is 1356703680. It was assigned on March 25, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. David Jonathan Segar?
Dr. David Jonathan Segar is a neurosurgeon in San Francisco, California. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. David Jonathan Segar practice?
Dr. Segar practices at 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810. Dr. Segar also practices at 505 Parnassus Ave, San Francisco, CA 94131. Dr. Segar's primary practice is University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California. Dmand AI also links Dr. Segar to 1 medical group.
What is Dr. David Jonathan Segar's office phone number?
The practice phone on file for Dr. Segar is (415) 476-1000.
What is Dr. David Jonathan Segar's medical license number?
Dr. Segar's California license number on file is A185505, one of the licenses on file in 3 states.
Which states has Dr. David Jonathan Segar been licensed in?
Dmand AI has state licenses on file for Dr. Segar in California (2023 to 2025), New York (2024 to 2026) and Massachusetts (2016 to 2023).
What medical group is Dr. David Jonathan Segar part of?
Dr. Segar is linked to UCSF Pediatrics. Dmand AI links Dr. Segar to 1 more medical group.
What is Dr. David Jonathan Segar's MIPS score?
Dr. Segar's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
Where did Dr. David Jonathan Segar go to medical school?
Dr. Segar graduated from The Warren Alpert Medical School of Brown University in 2016.
What drugs does Dr. David Jonathan Segar prescribe most?
In 2017 Medicare Part D data, Dr. Segar's most prescribed drugs by claims were Oxycodone HCl.
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Has Dr. David Jonathan Segar received payments from drug or device companies?
CMS Open Payments shows $1,768 in general payments to Dr. Segar from 3 companies from 2023 to 2024. The largest total came from ClearPoint Neuro, Inc.
How long has Dr. David Jonathan Segar been practicing?
Dr. Segar graduated from medical school in 2016, 10 years ago.
Does Dr. David Jonathan Segar do research?
Dmand AI links 40 publications to Dr. Segar, published from 2013 to 2025.
Who does Dr. David Jonathan Segar publish with?
Dr. Segar's most frequent co-authors are Garth Rees Cosgrove, FRCSC, MD (10 shared papers), Omar Arnaout, MD (5 shared papers) and Wael F. Asaad, MD, PhD (5 shared papers).
What insurance does Dr. David Jonathan Segar accept?
Dr. Segar is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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