John Gerard Brennan, DMD
- Part D claims, 2024
- 29
- Industry payments
- $62
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 2510 Nottingham Way, Mercerville, NJ 08619-4113
- Practice phone
- Call (609) 587-8300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gary A. Cortina
Dental practice · Mercerville, New Jersey
Find John Brennan'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.
John Gerard Brennan is a general practice dentistry in Mercerville, New Jersey
John Brennan practices at Gary A. Cortina in Mercerville, New Jersey.
John Brennan's NPI, 1851478184, was assigned on November 1, 2006. John Brennan holds New Jersey license DI20646.
- NPI
- 1851478184NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Practice phone
- (609) 587-8300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Gerard Brennan practices at Gary A. Cortina in Mercerville, New Jersey
John Brennan's primary practice is Gary A. Cortina, at 2510 Nottingham Way, Mercerville, NJ 08619-4113. The practice phone is (609) 587-8300.
- Gary A. Cortina2510 Nottingham Way, Mercerville, NJ 08619-4113Phone(609) 587-8300
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Gerard Brennan is affiliated with 1 site of care and 1 medical group
John Brennan's primary practice is Gary A. Cortina in Mercerville, New Jersey. Dmand AI also links John Brennan 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 John Gerard Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Brennan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gary A. Cortina | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John Gerard Brennan is one of 1,592 general practice dentistrys in New Jersey
General practice is John Brennan's primary specialty in the NPI Registry, under taxonomy code 1223G0001X. John Brennan is licensed in New Jersey.
Specialties and state licenses
- General practice dentistry, New JerseyPrimary
General practice dentistrys near John Brennan
Counts of general practice dentistrys 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
John Gerard Brennan wrote 29 Medicare Part D claims in 2024
In 2024, John Brennan wrote 29 Medicare Part D claims for 16 patients. 100% of them were for generic drugs.
Drug classes CMS tracks in John Brennan's Part D claims, 2024
- Antibiotics52%15 of 29 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
John Gerard Brennan received $62 in industry payments in 2025
CMS Open Payments shows 5 general payments to John Brennan from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Zimvie Inc. paid the most, $62.
Companies that paid John Brennan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John Gerard Brennan'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 (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 John Gerard Brennan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Gerard Brennan's NPI number?
John Gerard Brennan's NPI number is 1851478184. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What does John Gerard Brennan specialize in?
John Gerard Brennan is a general practice dentistry in Mercerville, New Jersey. The primary specialty in the NPI Registry is General Practice Dentistry (taxonomy code 1223G0001X).
Where does John Gerard Brennan practice?
John Brennan practices at 2510 Nottingham Way, Mercerville, NJ 08619-4113. John Brennan's primary practice is Gary A. Cortina in Mercerville, New Jersey. Dmand AI also links John Brennan to 1 medical group.
What is John Gerard Brennan's office phone number?
The practice phone on file for John Brennan is (609) 587-8300.
What is John Gerard Brennan's medical license number?
John Brennan holds New Jersey license DI20646.
Has John Gerard Brennan received payments from drug or device companies?
CMS Open Payments shows $62 in general payments to John Brennan from 1 company from 2025 to 2025. The largest total came from Zimvie Inc.
How long has John Gerard Brennan been practicing?
John Brennan's NPI was assigned in 2006.
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