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Corby S. Kessler, M.D., Inc

Medical Specialty Clinic/Center in Napa, CA · enumerated 2013 · authorized official Michele Castagnola, Office Manager.

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

National Provider Identifier

1669800405

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Registry record

Entity type Organization (Type 2)
Legal business name Corby S. Kessler, M.D., Inc
Practice address 935 Trancas St Ste 1b, Napa, CA, 94558
Phone (707) 255-6115
Fax (707) 255-6613
Enumeration date Oct 14, 2013
Last updated in NPPES Oct 14, 2013

Taxonomy & classification

261QM2500X Medical Specialty Clinic/Center Ambulatory Health Care Facilities · License G76902 (CA) Primary

Authorized official

Name Michele Castagnola
Title Office Manager
Phone (707) 255-6115

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

Who is the authorized official for Corby S. Kessler, M.D., Inc?
NPPES lists Michele Castagnola (Office Manager) as the authorized official for this organization.
What is the NPI number for Corby S. Kessler, M.D., Inc?
The NPI for Corby S. Kessler, M.D., Inc is 1669800405, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-14.