Yvonne J. Sinclair, MD
Family Medicine Physician · Groton, CT
Yvonne J. Sinclair, MD is a family medicine physician with a practice address in Groton, Connecticut, and NPI 1780197715, issued on Nov 13, 2017. Check the license on the Connecticut Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Yvonne J. Sinclair
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 215654-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 65 Merlino Dr, Groton, CT 06340
- Phone
- (860) 449-8897
- Enumerated
- Nov 13, 2017
- Record last updated
- Nov 13, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 958 in Connecticut → Look up another NPI →
Verify Yvonne J. Sinclair in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Yvonne J. Sinclair among 958 family medicine physician records in Connecticut
Yvonne J. Sinclair, MD is one of 958 family medicine physician records with a practice address in Connecticut. 79% 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 2017, is newer than 75% of them.
- NPI issued2017 · 75% of these records are older, 22% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2017 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 family medicine physician records list a practice address in Groton
They are 12 of the 734 NPPES records with a practice address in Groton, and 958 family medicine physician records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 958 in Connecticut → Every provider in Groton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jennifer Donahue, M.D.Groton, CT 063401275647448
- John Dorunda, M.D.Groton, CT 063401215928973
- Matthew KingGroton, CT 063401821679697
- Thomas Kucharchik, MDGroton, CT 063401558473769
- Patricia McIvor, M.D.Groton, CT 063401821102914
- Laura Watts, M.D.Groton, CT 063401326152414
- Robert Ciotola, M.D.Ledyard, CT 063391285791046
- William Beason, MDEast Lyme, CT 063331518940360
Common questions
What is Yvonne J. Sinclair, MD's NPI number?
Yvonne J. Sinclair, MD's National Provider Identifier (NPI) is 1780197715, issued on Nov 13, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Yvonne J. Sinclair, MD located?
The NPPES record lists a practice address at 65 Merlino Dr, Groton, CT, 06340. Phone: (860) 449-8897. Providers update this record themselves, so call before visiting.
How can I verify Yvonne J. Sinclair, MD's license?
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. 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.