Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marzena Sylvia Wesolowski

Mental Health Counselor in New York, NY · enumerated 2007.

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

National Provider Identifier

1841311883

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Registry record

Entity type Individual (Type 1)

Name Ms. Marzena Sylvia Wesolowski

Sex Female

Practice address 57 Saint Marks Pl, New York, NY, 10003

Phone (212) 982-3470

Fax (212) 477-0521

Enumeration date Apr 3, 2007

Last updated in NPPES Apr 17, 2026

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 008161 (NY) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1841311883 active?

Yes, as of the latest NPPES snapshot, NPI 1841311883 is active (record last updated 2026-04-17).

How do I verify Marzena Wesolowski's NPI record?

Cross-check NPI 1841311883 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-17.