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

Dr. Tonia Marie Lessani, MD

Internal Medicine Physician in Burlingame, CA · enumerated 2005.

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

National Provider Identifier

1356337075

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Registry record

Entity type Individual (Type 1)

Name Dr. Tonia Marie Lessani

Credential MD

Sex Female

Practice address Burlingame, CA, 94010

Phone (650) 696-5400

Enumeration date Sep 27, 2005

Last updated in NPPES Nov 7, 2011

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A6777 (CA) Primary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 20A6777 (CA) Secondary

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
20A6777	Other	CA	PRIVATE INSURANCE

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 Tonia Lessani practice?

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

What is the NPI number for Tonia Lessani?

The National Provider Identifier (NPI) for Tonia Lessani is 1356337075, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-07.