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Dr. Jan Slupski, MD

Internal Medicine Physician in Norwalk, CT · enumerated 2022 · practices at Clinic 21 of Connecticut LLC.

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

National Provider Identifier

1487396933

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Registry record

Entity type Individual (Type 1)
Name Dr. Jan Slupski
Credential MD
Sex Male
Practice address 497 Westport Ave, Norwalk, CT, 06851
Phone (203) 424-2830
Enumeration date Apr 13, 2022
Last updated in NPPES Apr 1, 2025

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 80315 (CT) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

Where does Jan Slupski practice?
The practice location on file with NPPES is in Norwalk, CT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Jan Slupski?
The National Provider Identifier (NPI) for Jan Slupski is 1487396933, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-01.