Dr. Joseph J. Brennan Jr., MD
- Medicare services, 2021
- 783
- Part D claims, 2022
- 781
- Hospital affiliations
- 1
- Industry payments
- $8,132
- Medical groups
- 2
- Practice address
- 950 Campbell Avenue, West Haven, CT 06516
- Practice phone
- Call (203) 932-5711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. 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.
Dr. Joseph J. Brennan Jr. is a cardiologist in West Haven, Connecticut
Dr. Brennan practices at West Haven VA Medical Center in West Haven, Connecticut, part of Veterans Health Administration.
Dr. Brennan's NPI, 1528057304, was assigned on October 14, 2005. Dr. Brennan graduated from Virginia Commonwealth University, School of Medicine in 1983. Dr. Brennan holds Connecticut license 027323.
- NPI
- 1528057304NPI Registry (opens in a new tab)
- NPI enumeration date
- October 14, 2005
- NPI status
- Active
- Practice phone
- (203) 932-5711
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Joseph J. Brennan Jr. practices at West Haven VA Medical Center in West Haven, Connecticut
Dr. Brennan's primary practice is West Haven VA Medical Center, at 950 Campbell Avenue, West Haven, CT 06516 in New Haven County. The practice phone is (203) 932-5711.
- West Haven VA Medical Center950 Campbell Avenue, West Haven, CT 06516 · New Haven CountyPhone(203) 932-5711
Source: Dmand AI Affiliation Data
Dr. Joseph J. Brennan Jr. is affiliated with 3 sites of care and 2 medical groups
Dr. Brennan's primary practice is West Haven VA Medical Center in West Haven, Connecticut, part of Veterans Health Administration. The medical group on file is Yale Health. Dmand AI also links Dr. Brennan to 2 more group practices and clinics and 1 medical group, each named with a free account. Dr. Brennan's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joseph J. Brennan Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| West Haven VA Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Joseph J. Brennan Jr. is one of 423 cardiologists in Connecticut
Cardiovascular disease is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Brennan is licensed in Connecticut.
Specialties and state licenses
- Cardiovascular disease, ConnecticutPrimary
Cardiologists near Dr. Brennan
Counts of cardiologists 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. Joseph J. Brennan Jr. billed Medicare for 783 services in 2021
CMS data shows 783 Medicare services from Dr. Brennan across 7 procedure codes in 2021. Medicare paid $40,698 for them.
Dr. Brennan's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 4952021: 43712%
- Tests and treatments
- 2020: 1972021: 34676%
Where Dr. Brennan's Medicare services took place, 2021
- In an office56873%
- In a facility21527%
Dr. Brennan compared with the Connecticut median for cardiologists, 2021
- Dr. Brennan
- Connecticut median
- Medicare services
- 783vs 1,35842% below
- Part D claims
- 781vs 1,57350% below
Medians across 415 cardiologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Brennan's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Brennan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Brennan and other cardiologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joseph J. Brennan Jr.'s patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Brennan's median patient age at 73, with 32% women.
Dr. Brennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women32%
- Men68%
Source: Dmand AI Patient Panel Data
Dr. Joseph J. Brennan Jr. wrote 781 Medicare Part D claims in 2022
In 2022, Dr. Brennan wrote 781 Medicare Part D claims. They cover 17 drugs, with $96,608 in total drug cost. In 2021, CMS named 2,820 claims across 42 drugs.
Dr. Brennan's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 2,8202022: 78172%
Drugs named by CMS: 17 in 2022, 42 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Joseph J. Brennan Jr. received $8,132 in industry payments from 2016 to 2025
CMS Open Payments shows 50 general payments to Dr. Brennan from 6 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 49% of the total. Biotronik Inc. paid the most, $4,000.
General payments to Dr. Brennan by program year, 2016 to 2025
General payments to Dr. Brennan by kind, 2016 to 2025
- Consulting fees$4,00049%
- Travel and lodging$2,60732%
- Food and beverage$1,52519%
Companies that paid Dr. Brennan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Joseph J. Brennan Jr. graduated from Virginia Commonwealth University, School of Medicine
Dr. Brennan graduated from Virginia Commonwealth University, School of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joseph J. Brennan Jr.'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| 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. Joseph J. Brennan Jr.
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. Joseph J. Brennan Jr.'s NPI number?
Dr. Joseph J. Brennan Jr.'s NPI number is 1528057304. It was assigned on October 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Joseph J. Brennan Jr.?
Dr. Joseph J. Brennan Jr. is a cardiologist in West Haven, Connecticut. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Joseph J. Brennan Jr. practice?
Dr. Brennan practices at 950 Campbell Avenue, West Haven, CT 06516. Dr. Brennan's primary practice is West Haven VA Medical Center in West Haven, Connecticut, part of Veterans Health Administration. Dmand AI also links Dr. Brennan to 2 group practices and clinics and 1 medical group.
What is Dr. Joseph J. Brennan Jr.'s office phone number?
The practice phone on file for Dr. Brennan is (203) 932-5711.
What is Dr. Joseph J. Brennan Jr.'s medical license number?
Dr. Brennan holds Connecticut license 027323.
Which hospitals is Dr. Joseph J. Brennan Jr. affiliated with?
Dr. Brennan practices at West Haven VA Medical Center in West Haven, Connecticut.
What medical group is Dr. Joseph J. Brennan Jr. part of?
Dr. Brennan is linked to Yale Health. Dmand AI links Dr. Brennan to 1 more medical group.
Does Dr. Joseph J. Brennan Jr. accept Medicare?
Yes. CMS data shows Dr. Brennan billed Medicare for 783 services in 2021.
What services does Dr. Joseph J. Brennan Jr. bill to Medicare?
In 2021, Dr. Brennan's most billed Medicare services were office visit, established patient (99213), heart test or procedure (93798) and special service (99152).
Where did Dr. Joseph J. Brennan Jr. go to medical school?
Dr. Brennan graduated from Virginia Commonwealth University, School of Medicine in 1983.
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What drugs does Dr. Joseph J. Brennan Jr. prescribe most?
In 2022 Medicare Part D data, Dr. Brennan's most prescribed drugs by claims were Rosuvastatin Calcium, Metoprolol Succinate and Atorvastatin Calcium.
Has Dr. Joseph J. Brennan Jr. received payments from drug or device companies?
CMS Open Payments shows $8,132 in general payments to Dr. Brennan from 6 companies from 2016 to 2025. The largest total came from Biotronik Inc.
How long has Dr. Joseph J. Brennan Jr. been practicing?
Dr. Brennan graduated from medical school in 1983, 43 years ago.
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