Thomas M. Halaszynski, MD
Anesthesiology Physician · New Haven, CT
Thomas M. Halaszynski, MD is an anesthesiology physician with a practice address in New Haven, Connecticut, and NPI 1679554984, issued on Nov 14, 2005. Check the license (Connecticut 036445, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Thomas M. Halaszynski
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 036445 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St, New Haven, CT 06510
- Phone
- (203) 785-2802
- Enumerated
- Nov 14, 2005
- Record last updated
- Jul 7, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (203) 785-6664
- Medicaid ID
- 001364455 CT
- Medicare enrollment
- Enrolled (PECOS I20200321000621); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 797 in Connecticut → Look up another NPI →
Also registered at 20 York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas M. Halaszynski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 036445Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- University OF North Carolina AT Chapel HillChapel Hill, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas M. Halaszynski among 797 anesthesiology physician records in Connecticut
Thomas M. Halaszynski, MD is one of 797 anesthesiology physician records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1984 · median 2006 among the 550 with a school on file
- Record last updated2008 · 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 207L00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
215 anesthesiology physician records list a practice address in New Haven
They are 215 of the 9,793 NPPES records with a practice address in New Haven, and 797 anesthesiology physician records in Connecticut.
All 797 in Connecticut → Every provider in New Haven → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- David Freyle, MDNew Haven, CT 065101487635728
- Dorothy Gaal, MDNew Haven, CT 065101861473563
- Lars Helgeson, MDNew Haven, CT 065101528049210
- Adriana Herrera, MDNew Haven, CT 065101992786685
- Viji Kurup, MDNew Haven, CT 065101285615971
- Lisa Leffert, MDNew Haven, CT 065101992795579
- Wanda Popescu, MDNew Haven, CT 065101861473548
- Stanley Rosenbaum, MDNew Haven, CT 065101457332140
Common questions
What is Thomas M. Halaszynski, MD's NPI number?
Thomas M. Halaszynski, MD's National Provider Identifier (NPI) is 1679554984, issued on Nov 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas M. Halaszynski, MD located?
The NPPES record lists a practice address at 20 York St, New Haven, CT, 06510. Phone: (203) 785-2802. Providers update this record themselves, so call before visiting.
How can I verify Thomas M. Halaszynski, MD's license?
NPPES lists Connecticut license number 036445, 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.
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.