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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark S Kasper, MD

Internal Medicine Physician in Branford, CT · enumerated 2006 · practices at Internal Medicine of East Haven PC.

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

National Provider Identifier

1780648238

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark S Kasper
Credential MD
Sex Male
Practice address 144 N Main St Ste 5, Branford, CT, 06405
Phone (203) 468-9775
Fax (203) 468-2485
Enumeration date Apr 13, 2006
Last updated in NPPES Jun 11, 2026

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 024717 (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
001309980 Medicaid CT -
110001474 Other CT PTAN
C00229 Other CT MEDICARE PTAN

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

How do I verify Mark Kasper's NPI record?
Cross-check NPI 1780648238 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1780648238 active?
Yes, as of the latest NPPES snapshot, NPI 1780648238 is active (record last updated 2026-06-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-11.