Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marc Bruce Kallinen, O.D.
Optometrist in Groton, CT · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1184056640
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Registry record
Entity type Individual (Type 1)
Name Dr. Marc Bruce Kallinen
Credential O.D.
Sex Male
Practice address 1041 Poquonnock Rd, Groton, CT, 06340
Phone (860) 445-1000
Fax (860) 445-3347
Enumeration date Aug 6, 2013
Last updated in NPPES May 16, 2019
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
How do I verify Marc Kallinen's NPI record?
Cross-check NPI 1184056640 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1184056640 active?
Yes, as of the latest NPPES snapshot, NPI 1184056640 is active (record last updated 2019-05-16).
Other providers at this practice address
Browse all → George Adrian Optometrist · Groton, CT NPI 1659337145 Southeast Connecticut Eye Care, LLC Ophthalmology Physician · Groton, CT NPI 1326568502 Kallinen Eye Care, LLC Optometrist · Groton, CT NPI 1114582129 Pamela Nardella Optometrist · Groton, CT NPI 1407454473 Jessica Fretto Optometrist · Groton, CT NPI 1063010668 Coastal Counseling LLC Community/Behavioral Health Agency · Groton, CT NPI 1699443168
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-16.