Dr. David Fagan, MD
- Industry payments
- $531
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 504 Hicksville Rd, Massapequa, NY 11758
- Practice phone
- Call (516) 321-7400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwell Health Physician Partners Cardiology
Massapequa, New York
Find Dr. Fagan'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 Fagan is a pediatrician in Massapequa, New York
Dr. Fagan practices at Northwell Health Physician Partners Cardiology in Massapequa, New York.
Dr. Fagan's NPI, 1245233790, was assigned on May 28, 2005. Dr. Fagan graduated from Stony Brook University Health Sciences Center School of Medicine in 1996. Dr. Fagan holds New York license 210189.
- NPI
- 1245233790NPI Registry (opens in a new tab)
- NPI enumeration date
- May 28, 2005
- NPI status
- Active
- Practice phone
- (516) 321-7400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. David Fagan practices at Northwell Health Physician Partners Cardiology in Massapequa, New York
Dr. Fagan's primary practice is Northwell Health Physician Partners Cardiology, at 504 Hicksville Rd, Massapequa, NY 11758 in Nassau County. The practice phone is (516) 321-7400.
- Northwell Health Physician Partners Cardiology504 Hicksville Rd, Massapequa, NY 11758 · Nassau CountyPhone(516) 321-7400
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David Fagan is affiliated with 2 sites of care and 2 medical groups
Dr. Fagan's primary practice is Northwell Health Physician Partners Cardiology in Massapequa, New York. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Dr. Fagan to 1 more group practice or clinic and 1 medical group, 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. David Fagan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fagan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwell Health Physician Partners Cardiology | 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. David Fagan is one of 4,313 pediatricians in New York
Pediatrics is Dr. Fagan's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Fagan is licensed in New York.
Specialties and state licenses
- Pediatrics, New YorkPrimary
Pediatricians near Dr. Fagan
Counts of pediatricians 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 Fagan's patients have a median age of 6
Across all payers, Dmand AI patient panel data puts Dr. Fagan's median patient age at 6, with 43% women.
Dr. Fagan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 6
Patient panel by sex, all payers
- Women43%
- Men56%
Source: Dmand AI Patient Panel Data
Dr. David Fagan received $531 in industry payments from 2018 to 2025
CMS Open Payments shows 10 general payments to Dr. Fagan from 3 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $380.
General payments to Dr. Fagan by program year, 2018 to 2025
Companies that paid Dr. Fagan the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David Fagan graduated from Stony Brook University Health Sciences Center School of Medicine
Dr. Fagan graduated from Stony Brook University Health Sciences Center School of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Fagan'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 |
| 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. David Fagan
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 Fagan's NPI number?
Dr. David Fagan's NPI number is 1245233790. It was assigned on May 28, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. David Fagan?
Dr. David Fagan is a pediatrician in Massapequa, New York. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. David Fagan practice?
Dr. Fagan practices at 504 Hicksville Rd, Massapequa, NY 11758. Dr. Fagan's primary practice is Northwell Health Physician Partners Cardiology in Massapequa, New York. Dmand AI also links Dr. Fagan to 1 group practice or clinic and 1 medical group.
What is Dr. David Fagan's office phone number?
The practice phone on file for Dr. Fagan is (516) 321-7400.
What is Dr. David Fagan's medical license number?
Dr. Fagan holds New York license 210189.
What medical group is Dr. David Fagan part of?
Dr. Fagan is linked to Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI links Dr. Fagan to 1 more medical group.
Where did Dr. David Fagan go to medical school?
Dr. Fagan graduated from Stony Brook University Health Sciences Center School of Medicine in 1996.
Has Dr. David Fagan received payments from drug or device companies?
CMS Open Payments shows $531 in general payments to Dr. Fagan from 3 companies from 2018 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. David Fagan been practicing?
Dr. Fagan graduated from medical school in 1996, 30 years ago.
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