Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anna Andrzejczyk

Hematology & Oncology Physician in Stony Brook, NY · enumerated 2018.

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

National Provider Identifier

1275030231

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Registry record

Entity type Individual (Type 1)

Name Anna Andrzejczyk

Sex Female

Practice address Dept. of Internal Medicine, Hsc Level 16-020, Suny Stony Brook, Stony Brook, NY, 11794

Phone (631) 444-2493

Enumeration date Apr 6, 2018

Last updated in NPPES Sep 18, 2024

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 318693-01 (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

Where does Anna Andrzejczyk practice?

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

What is the NPI number for Anna Andrzejczyk?

The National Provider Identifier (NPI) for Anna Andrzejczyk is 1275030231, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-18.