Brian Barry Hennessy, MD
Internal Medicine Physician · Stamford, CT
Brian Barry Hennessy, MD is an internal medicine physician with a practice address in Stamford, Connecticut, and NPI 1013072453, issued on Dec 26, 2006. Check the license (Connecticut 025350, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Brian Barry Hennessy
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 025350 CT
Self-reported in NPPES; status is on the state search - Practice location
- 90 Morgan St, Stamford, CT 06905
- Phone
- (203) 348-2922
- Enumerated
- Dec 26, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 358-8721
- Medicaid ID
- 1253509 CT
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 90 Morgan St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Antonios Katsigiannis, M.D.Internal Medicine Physician1629157276
Verify Brian Barry Hennessy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 025350Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
14 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Desmopressin Acetate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Brian Barry Hennessy among 2,623 internal medicine physician records in Connecticut
Brian Barry Hennessy, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
131 internal medicine physician records list a practice address in Stamford
They are 131 of the 2,774 NPPES records with a practice address in Stamford, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Stamford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Uday Desai, M.D.Stamford, CT 069051124122148
- Vernetta Gallop, MDStamford, CT 069051811981202
- Erica Goldberger, M.D.Stamford, CT 069051053419648
- Terrance Hanlon, MDStamford, CT 069051922052695
- Antonios Katsigiannis, M.D.Stamford, CT 069051629157276
- Tulin Koparan, MDStamford, CT 069051710045703
- Santi Neuberger, M.D.Stamford, CT 069051013024736
- David Radin, MDStamford, CT 069051225076193
Common questions
What is Brian Barry Hennessy, MD's NPI number?
Brian Barry Hennessy, MD's National Provider Identifier (NPI) is 1013072453, issued on Dec 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brian Barry Hennessy, MD located?
The NPPES record lists a practice address at 90 Morgan St, Stamford, CT, 06905. Phone: (203) 348-2922. Providers update this record themselves, so call before visiting.
How can I verify Brian Barry Hennessy, MD's license?
NPPES lists Connecticut license number 025350, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brian Barry Hennessy, MD prescribe under Medicare Part D?
In 2024, Brian Barry Hennessy, MD had 14 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.