Gregory C. Walsh, MD
Internal Medicine Physician · West Hartford, CT
Gregory C. Walsh, MD is an internal medicine physician with a practice address in West Hartford, Connecticut, and NPI 1063496883, issued on Dec 5, 2005. Check the license (Connecticut 021042, as entered in NPPES) on the Connecticut Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory C. Walsh
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 021042 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 Isham RD, West Hartford, CT 06107
- Phone
- (860) 527-1669
- Enumerated
- Dec 5, 2005
- Record last updated
- May 24, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (860) 293-0783
- Medicaid ID
- 1210426 CT
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 20 Isham RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Matthew Colliton, MDInternal Medicine Physician1609853126
- Lisa Hughes, MS, ATC-L, LMTAthletic Trainer1134322761
- Philip Karanian, MDInternal Medicine Physician1437136132
- Lisa Knoll, APRNPrimary Care Nurse Practitioner1740766500
- Rolf Knoll, MDInternal Medicine Physician1881696193
Verify Gregory C. Walsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 021042Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory C. Walsh among 2,623 internal medicine physician records in Connecticut
Gregory C. Walsh, 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 not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2011 · 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).
51 internal medicine physician records list a practice address in West Hartford
They are 51 of the 1,653 NPPES records with a practice address in West Hartford, and 2,623 internal medicine physician records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,623 in Connecticut → Every provider in West Hartford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sally Ardolino, MDWest Hartford, CT 061071376569392
- Anthony Ardolino, MDWest Hartford, CT 061071386658276
- Matthew Colliton, MDWest Hartford, CT 061071609853126
- Philip Karanian, MDWest Hartford, CT 061071437136132
- Rolf Knoll, MDWest Hartford, CT 061071881696193
- John Papandrea, MDWest Hartford, CT 061071083638837
- Julian Parsons, M.D.West Hartford, CT 061071639111008
- Mark Polatnick, M.D.West Hartford, CT 061071376562090
Common questions
What is Gregory C. Walsh, MD's NPI number?
Gregory C. Walsh, MD's National Provider Identifier (NPI) is 1063496883, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory C. Walsh, MD located?
The NPPES record lists a practice address at 20 Isham RD, West Hartford, CT, 06107. Phone: (860) 527-1669. Providers update this record themselves, so call before visiting.
How can I verify Gregory C. Walsh, MD's license?
NPPES lists Connecticut license number 021042, 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. 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.