Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Marshall S. Lewis, MD A Professional Corporation

Specialist in Fresno, CA · enumerated 2013 · authorized official Diana Galvan, Credentialer.

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

National Provider Identifier

1205260817

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Registry record

Entity type Organization (Type 2)

Legal business name Marshall S. Lewis, MD A Professional Corporation

Practice address 1332 W Herndon Ave, Fresno, CA, 93711

Phone (559) 439-1145

Fax (559) 439-1345

Enumeration date Aug 30, 2013

Last updated in NPPES Aug 30, 2013

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers · License DC30003 (CA) Secondary

171100000X Acupuncturist Other Service Providers · License AC9103 (CA) Secondary

174400000X Specialist Other Service Providers · License G282420 (CA) Primary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA15629 (CA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License MC2665214 (CA) Secondary

Authorized official

Name Diana Galvan

Title Credentialer

Phone (661) 861-0011

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 type of organization is Marshall S. Lewis, MD A Professional Corporation?

Marshall S. Lewis, MD A Professional Corporation is registered in NPPES as a Specialist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-30.