Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Oxana Vassiltsova

Mental Health Counselor in Marlborough, MA · enumerated 2025.

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

National Provider Identifier

1093514820

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Registry record

Entity type Individual (Type 1)

Name Oxana Vassiltsova

Sex Female

Practice address 33 Boston Post Rd W, Marlborough, MA, 01752

Phone (508) 824-3673

Enumeration date Mar 12, 2025

Last updated in NPPES Jul 4, 2025

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers 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

How do I verify Oxana Vassiltsova's NPI record?

Cross-check NPI 1093514820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1093514820 active?

Yes, as of the latest NPPES snapshot, NPI 1093514820 is active (record last updated 2025-07-04).

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