NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Natalie Mashkevich

Behavior Analyst in Brooklyn, NY · enumerated 2023 · practices at Billwell Corporation.

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

National Provider Identifier

1639852197

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Registry record

Entity type Individual (Type 1)
Name Natalie Mashkevich
Sex Female
Practice address Brooklyn, NY, 11235
Phone (917) 318-2233
Enumeration date Aug 10, 2023
Last updated in NPPES Sep 24, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1736231231 (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.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Natalie Mashkevich?
Natalie Mashkevich is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-24.