Marc Sherwin
Anesthesiology Physician · New Haven, CT
Marc Sherwin is an anesthesiology physician with a practice address in New Haven, Connecticut, and NPI 1023435476, issued on Mar 24, 2014. Check the license (Connecticut 81728, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Marc Sherwin
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License numbers
- 81728 CT
291705 NY
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St, New Haven, CT 06510
- Phone
- (203) 785-2802
- Enumerated
- Mar 24, 2014
- Record last updated
- Jun 4, 2025
- Medicaid ID
- 05288344 NY
- Medicare enrollment
- Enrolled (PECOS I20180619002231); accepts Medicare assignment
- 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.
- Cyrena Abbasi, MDStudent in an Organized Health Care Education/Training Program1609703289
- Ali Abboud, MD, MBAStudent in an Organized Health Care Education/Training Program1942943097
- Basil Abdalla, MDStudent in an Organized Health Care Education/Training Program1154905057
- Jasmina AbdallaStudent in an Organized Health Care Education/Training Program1700638590
- Sarah AbdallahPsychiatry Physician1740800952
- Usama Abdelghany, PHARM DOncology Pharmacist1548827843
Verify Marc Sherwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 81728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $762.98
3 payments; by number, the most common kind was consulting fee; the largest payer was Medtronic, Inc. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Fpa Hospital BasedNew York, NY
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc Sherwin among 797 anesthesiology physician records in Connecticut
Marc Sherwin 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 2014, is newer than 73% of them.
- NPI issued2014 · 73% of these records are older, 23% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2014 · median 2006 among the 550 with a school on file
- Record last updated2025 · 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
- Thomas Halaszynski, MDNew Haven, CT 065101679554984
- 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
Common questions
What is Marc Sherwin's NPI number?
Marc Sherwin's National Provider Identifier (NPI) is 1023435476, issued on Mar 24, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Marc Sherwin 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 Marc Sherwin's license?
NPPES lists Connecticut license number 81728, 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.