William Brennan
Clinical Social Worker · New Britain, CT
William Brennan is a clinical social worker with a practice address in New Britain, Connecticut, and NPI 1346624822, issued on Jul 15, 2015. Check the license (Connecticut 001219, as entered in NPPES) with the Connecticut board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Brennan
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 001219 CT
Self-reported in NPPES; status is on the state search - Practice location
- 75 N Mountain RD, New Britain, CT 06053
- Phone
- (860) 224-6367
- Enumerated
- Jul 15, 2015
- Record last updated
- Jul 15, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 7,729 in Connecticut → Look up another NPI →
Also registered at 75 N Mountain RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cassandra AamodtSocial Worker1801355219
- Heather Arduini, MFTMarriage & Family Therapist1336523547
- Anne Becker, M.S.W.Clinical Social Worker1457519282
- Angela Branch-James, M.ED, LADCAddiction (Substance Use Disorder) Counselor1396883120
- Nicole CarrasquilloSocial Worker1619343704
- Sara Cassano, M.F.T.Marriage & Family Therapist1053500918
Verify William Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 001219Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Brennan among 7,729 clinical social worker records in Connecticut
William Brennan is one of 7,729 clinical social worker records with a practice address in Connecticut. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2015, is newer than 50% of them.
- NPI issued2015 · 50% of these records are older, 46% newer
- In a Medicare fileNo · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · 23% of these records are
- Record last updated2015 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
189 clinical social worker records list a practice address in New Britain
They are 189 of the 1,772 NPPES records with a practice address in New Britain, and 7,729 clinical social worker records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,729 in Connecticut → Every provider in New Britain → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Lori Annear, LCSWNew Britain, CT 060531649276908
- Anne Becker, M.S.W.New Britain, CT 060531457519282
- Gabrielle Book, LCSWNew Britain, CT 060531891386066
- Sonia Bultron, LCSWNew Britain, CT 060531982220398
- Alexandra Feliciano, LCSWNew Britain, CT 060531760096705
- Gina Gates, LCSWNew Britain, CT 060531790306967
- Erin GenlotNew Britain, CT 060531194270322
- Maryanne Maliglowka, LCSWNew Britain, CT 060531083111736
Common questions
What is William Brennan's NPI number?
William Brennan's National Provider Identifier (NPI) is 1346624822, issued on Jul 15, 2015. An NPI identifies a provider in billing; it is not a license.
Where is William Brennan located?
The NPPES record lists a practice address at 75 N Mountain RD, New Britain, CT, 06053. Phone: (860) 224-6367. Providers update this record themselves, so call before visiting.
How can I verify William Brennan's license?
NPPES lists Connecticut license number 001219, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity 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. 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.