Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Leszek A Kolodziejczak, MD

Surgery Physician in Willimantic, CT · enumerated 2006.

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

National Provider Identifier

1689600561

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Registry record

Entity type Individual (Type 1)

Name Mr. Leszek A Kolodziejczak

Credential MD

Sex Male

Practice address 162 Mansfield Ave., B, Willimantic, CT, 06226

Phone (860) 423-5000

Fax (860) 423-4838

Enumeration date Jun 23, 2006

Last updated in NPPES Sep 3, 2019

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 032557 (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
010032557CT01	Other	CT	ANTHEM BC / BS
030946	Other	CT	HEALTHNET
001325572	Medicaid	CT	-
001325572	Other	CT	BLUE CARE FAMILY PLAN
0811232	Other	CT	AETNA / US HEALTHCARE
9079072002	Other	CT	CIGNA
P469467	Other	CT	OXFORD
P04569	Other	CT	CHN
767225	Other	CT	CONNECTICARE

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 Leszek Kolodziejczak practice?

The practice location on file with NPPES is in Willimantic, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Leszek Kolodziejczak?

The National Provider Identifier (NPI) for Leszek Kolodziejczak is 1689600561, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Karla Scanlon Podiatrist · Willimantic, CT NPI 1063412971 Alexander Salamatian Physical Therapist · Willimantic, CT NPI 1407689102

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-09-03.