Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Vivian M Mastroianni, PA C

Physician Assistant in Danbury, CT · enumerated 2006.

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

National Provider Identifier

1073579694

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Registry record

Entity type Individual (Type 1)

Name Ms. Vivian M Mastroianni

Credential PA C

Sex Female

Practice address 73 Sand Pit Rd, Suite 207, Danbury, CT, 06810

Phone (203) 792-4151

Fax (203) 792-4155

Enumeration date Apr 22, 2006

Last updated in NPPES Mar 4, 2008

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 000274 (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.

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Frequently asked questions

How do I verify Vivian Mastroianni's NPI record?

Cross-check NPI 1073579694 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1073579694 active?

Yes, as of the latest NPPES snapshot, NPI 1073579694 is active (record last updated 2008-03-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-04.