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

Dr. Patrick Paul Mastroianni, M.D.

Specialist in Bridgeport, CT · enumerated 2006.

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

National Provider Identifier

1073539367

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Registry record

Entity type Individual (Type 1)

Name Dr. Patrick Paul Mastroianni

Credential M.D.

Sex Male

Practice address Bridgeport, CT, 06606

Phone (203) 336-3306

Fax (203) 336-5802

Enumeration date Jul 13, 2006

Last updated in NPPES Apr 19, 2010

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 023870 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0534330	Other	CT	AETNA PROVIDER ID
010023870CT05	Other	CT	ANTHEM BC PROVIDER ID
002199	Other	CT	HEALTHNET PROVIDER ID
061386448	Other	CT	BERKLEY CARE PROVIDER ID
ZS254	Other	CT	OXFORD HEALTH PROV. ID

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

Is NPI 1073539367 active?

Yes, as of the latest NPPES snapshot, NPI 1073539367 is active (record last updated 2010-04-19).

How do I verify Patrick Mastroianni's NPI record?

Cross-check NPI 1073539367 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-04-19.