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

Laurence J Mazzotta, M.D.

Gastroenterology Physician in Vallejo, CA · enumerated 2006.

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

National Provider Identifier

1790740546

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Registry record

Entity type Individual (Type 1)

Name Laurence J Mazzotta

Credential M.D.

Sex Male

Practice address Vallejo, CA, 94590

Phone (707) 648-3327

Fax (707) 648-3902

Enumeration date Apr 17, 2006

Last updated in NPPES Jun 22, 2010

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

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 628907 (CA) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G28907 (CA) 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
00G289070	Medicaid	CA	-

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 Laurence Mazzotta?

The National Provider Identifier (NPI) for Laurence Mazzotta is 1790740546, a Type 1 (individual) record in the CMS NPPES registry.

Where does Laurence Mazzotta practice?

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

Other providers at this practice address

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Paul Weiner Foot & Ankle Surgery Podiatrist · Vallejo, CA NPI 1730167370 Wellbound of Vallejo LLC End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Vallejo, CA NPI 1487699567 Ronald Bieselin Surgery Physician · Vallejo, CA NPI 1912009283 Dr. Janet Caro, Inc. D.D.S. General Practice Dentistry · Vallejo, CA NPI 1790840924 Laurence J. Mazzotta MD PC Gastroenterology Physician · Vallejo, CA NPI 1386825750 Paul David Weiner Foot & Ankle Surgery Podiatrist · Vallejo, CA NPI 1730350422 Setty DDS Inc. Dentist · Vallejo, CA NPI 1063737609 Ryan Thomas Foot & Ankle Surgery Podiatrist · Vallejo, CA NPI 1609187392

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-22.