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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Roger H Karlin, MD

Internal Medicine Physician in New Fairfield, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1700894177

Verified

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Registry record

Entity type Individual (Type 1)
Name Roger H Karlin
Credential MD
Sex Male
Practice address New Fairfield, CT, 06812
Phone (203) 746-2436
Fax (203) 746-3205
Enumeration date Aug 3, 2006
Last updated in NPPES Jan 11, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 19394 (CT) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 19394 (CT) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
529936 Other - AETNA
P377391 Other - OXFORD
040363 Other - HEALTH NET
2010059 Other - AETNA

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.

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Frequently asked questions

Where does Roger Karlin practice?
The practice location on file with NPPES is in New Fairfield, CT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Roger Karlin?
The National Provider Identifier (NPI) for Roger Karlin is 1700894177, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-11.