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

Dr. David Merzel, M.D.

Anesthesiology Physician in Fresno, CA · enumerated 2006 · practices at Stewart Integrative Psychological Services, Inc.

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

National Provider Identifier

1194810812

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Registry record

Entity type Individual (Type 1)

Name Dr. David Merzel

Credential M.D.

Sex Male

Practice address Fresno, CA, 93710

Phone (559) 449-4350

Fax (559) 449-4358

Enumeration date Oct 4, 2006

Last updated in NPPES Sep 11, 2025

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

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G63061 (CA) Primary

2080P0203X Pediatric Critical Care Medicine Physician Allopathic & Osteopathic Physicians · License G63061 (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
ZZZ71868Z	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.

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Frequently asked questions

What specialty is David Merzel?

David Merzel is registered in NPPES with the primary taxonomy of Anesthesiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

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Craig Aaronson Podiatrist · Fresno, CA NPI 1407896517 Kathleen Murphy Pediatric Critical Care Medicine Physician · Fresno, CA NPI 1053322784 Christine Almon Anesthesiology Physician · Fresno, CA NPI 1497766141 Vanna Soonthon-Brant Pediatric Anesthesiology Physician · Fresno, CA NPI 1730273434 Virgil Airola Anesthesiology Physician · Fresno, CA NPI 1952495608 Marino Fernandez Anesthesiology Physician · Fresno, CA NPI 1871688739 Robert Dimand Pediatric Critical Care Medicine Physician · Fresno, CA NPI 1184719148 Adam Holmes Pediatric Critical Care Medicine Physician · Fresno, CA NPI 1821183773

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.