Gastrointest Endosc
BiopsyColitisColon, Descending
Dr. Neil D. Fagen, MD
NPI1700878428
- Part D claims, 2024
- 48
- Publications
- 3
- Industry payments
- $249
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 18411 Clark St Ste 204 Suite 204, Tarzana, CA 91356-3535
- Practice phone
- Call (818) 996-4796
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Michael Madievsky
Medical specialty practice · Tarzana, California
Find Dr. Fagen'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. Neil D. Fagen is a gastroenterologist in California
Dr. Fagen practices at Michael Madievsky in Tarzana, California.
Dr. Fagen's NPI, 1700878428, was assigned on August 18, 2005. Dr. Fagen graduated from Drexel University College Of Medicine in 1972. Dr. Fagen holds California license G29304.
NPI and contact details
- NPI
- 1700878428NPI Registry (opens in a new tab)
- NPI enumeration date
- August 18, 2005
- NPI status
- Active
- Practice phone
- (818) 996-4796
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Neil D. Fagen practices at Michael Madievsky in Tarzana, California
Dr. Fagen's primary practice is Michael Madievsky, at 18411 Clark St Ste 204 Suite 204, Tarzana, CA 91356-3535. The practice phone is (818) 996-4796.
- Michael Madievsky18411 Clark St Ste 204 Suite 204, Tarzana, CA 91356-3535Phone(818) 996-4796
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Neil D. Fagen is affiliated with 2 sites of care and 1 medical group
Dr. Fagen's primary practice is Michael Madievsky in Tarzana, California. Dmand AI also links Dr. Fagen to 1 physician office and 1 medical group, each named with a free account.
Michael MadievskyPrimary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Neil D. Fagen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fagen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Michael Madievsky | 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. Neil D. Fagen is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Fagen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Fagen is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Fagen
Counts of gastroenterologists 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. Neil D. Fagen wrote 48 Medicare Part D claims in 2024
In 2024, Dr. Fagen wrote 48 Medicare Part D claims. 67% of them were for generic drugs. They cover 10 drugs, with $32,533 in total drug cost.
Part D claims, 202448
Drugs named by CMS10
Total drug cost$32,533
Dr. Fagen's Part D claims by kind of drug, 2024
- Generic32 claims67%
- Brand-name and other16 claims33%
Dr. Fagen's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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. Neil D. Fagen has 3 publications on record
Dmand AI links 3 papers to Dr. Fagen. The most frequent topics are Biopsy, Hepatitis B and Liver. Dr. Fagen's most frequent co-author is Ronald Lee Koretz, MD.
Papers3
Topics Dr. Fagen writes about most
- Biopsy
- Hepatitis B
- Liver
Dr. Fagen's most frequent co-authors
Recent publications by Dr. Fagen
Gastroenterology
Antineoplastic AgentsBreast NeoplasmsCarrier State
BiopsyHepatitisHepatitis B
See who Dr. Fagen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fagen works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Neil D. Fagen received $249 in industry payments from 2016 to 2017
CMS Open Payments shows 3 general payments to Dr. Fagen from 3 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $118.
General payments to Dr. Fagen by program year, 2016 to 2017
Companies that paid Dr. Fagen the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Neil D. Fagen graduated from Drexel University College Of Medicine
Dr. Fagen graduated from Drexel University College Of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Neil D. Fagen'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) |
| 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) |
| 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 |
| 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. Neil D. Fagen
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. Neil D. Fagen's NPI number?
Dr. Neil D. Fagen's NPI number is 1700878428. It was assigned on August 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Neil D. Fagen?
Dr. Neil D. Fagen is a gastroenterologist in California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Neil D. Fagen practice?
Dr. Fagen practices at 18411 Clark St Ste 204 Suite 204, Tarzana, CA 91356-3535. Dr. Fagen's primary practice is Michael Madievsky in Tarzana, California. Dmand AI also links Dr. Fagen to 1 physician office and 1 medical group.
What is Dr. Neil D. Fagen's office phone number?
The practice phone on file for Dr. Fagen is (818) 996-4796.
What is Dr. Neil D. Fagen's medical license number?
Dr. Fagen holds California license G29304.
Where did Dr. Neil D. Fagen go to medical school?
Dr. Fagen graduated from Drexel University College Of Medicine in 1972.
What drugs does Dr. Neil D. Fagen prescribe most?
In 2016 Medicare Part D data, Dr. Fagen's most prescribed drugs by claims were Pantoprazole Sodium, Welchol and Dexilant.
Has Dr. Neil D. Fagen received payments from drug or device companies?
CMS Open Payments shows $249 in general payments to Dr. Fagen from 3 companies from 2016 to 2017. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Neil D. Fagen been practicing?
Dr. Fagen graduated from medical school in 1972, 54 years ago.
Does Dr. Neil D. Fagen do research?
Dmand AI links 3 publications to Dr. Fagen.
Who does Dr. Neil D. Fagen publish with?
Dr. Fagen's most frequent co-authors are Ronald Lee Koretz, MD (1 shared paper).
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