Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Fontana, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Thousand Oaks, CA · enumerated 2005.

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

National Provider Identifier

1508840570

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Fontana

Credential M.D.

Sex Male

Practice address 215 W Janss Rd, Thousand Oaks, CA, 91360

Phone (805) 852-9100

Enumeration date Dec 2, 2005

Last updated in NPPES Feb 9, 2022

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 263949 (NY) Primary

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

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

What is the NPI number for Gregory Fontana?

The National Provider Identifier (NPI) for Gregory Fontana is 1508840570, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Fontana practice?

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

Other providers at this practice address

Browse all →

Philip Faraci Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Thousand Oaks, CA NPI 1851391593 Tuyet Tran Emergency Medicine Physician · Thousand Oaks, CA NPI 1316920374 Catherine Moses Diagnostic Radiology Physician · Thousand Oaks, CA NPI 1033189865 Regina Patricia Singson Anatomic Pathology & Clinical Pathology Physician · Thousand Oaks, CA NPI 1609842863 Richard Kelty Anatomic Pathology & Clinical Pathology Physician · Thousand Oaks, CA NPI 1154397164 Wayne Schultheis Anatomic Pathology & Clinical Pathology Physician · Thousand Oaks, CA NPI 1831165836 Sorrell Glover Anatomic Pathology & Clinical Pathology Physician · Thousand Oaks, CA NPI 1881662211 Dean Wilson Physician Assistant · Thousand Oaks, CA NPI 1659329951

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-09.