Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandra Hirt, PA-C

Surgical Physician Assistant in Danbury, CT · enumerated 2021 · practices at Business Systems Inc.

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

National Provider Identifier

1821769555

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Registry record

Entity type Individual (Type 1)

Name Alexandra Hirt

Credential PA-C

Sex Female

Practice address 95 Locust Ave, Danbury, CT, 06810

Phone (203) 739-7029

Enumeration date Sep 22, 2021

Last updated in NPPES Sep 19, 2024

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 027187 (NY) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 6699 (CT) Secondary

363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 6699 (CT) 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 Alexandra Hirt practice?

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

What is the NPI number for Alexandra Hirt?

The National Provider Identifier (NPI) for Alexandra Hirt is 1821769555, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Martin Abrams Hematology & Oncology Physician · Danbury, CT NPI 1073507851 Robert Cooper Hematology & Oncology Physician · Danbury, CT NPI 1346234127 Daniel Labow Surgical Oncology Physician · Danbury, CT NPI 1346216157 Linus Chuang Gynecologic Oncology Physician · Danbury, CT NPI 1538100722 Business Systems Inc Community/Retail Pharmacy · Danbury, CT NPI 1083658835 Vadim Tikhomirov Internal Medicine Physician · Danbury, CT NPI 1982649836 Kenneth Osnoss Internal Medicine Physician · Danbury, CT NPI 1750317855 Cornelius Ferreira Family Medicine Physician · Danbury, CT NPI 1932130168

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-19.