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

Dr. James Edward Mertzel, DDS

General Practice Dentistry in Sunland, CA · enumerated 2006 · practices at Shahen Rostamian DDS Inc.

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

National Provider Identifier

1740258482

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Registry record

Entity type Individual (Type 1)

Name Dr. James Edward Mertzel

Credential DDS

Sex Male

Practice address Sunland, CA, 91040

Phone (818) 352-3174

Fax (818) 352-0104

Enumeration date Mar 9, 2006

Last updated in NPPES Jan 21, 2016

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 15092 (CA) Primary

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
B15092	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 James Mertzel?

James Mertzel is registered in NPPES with the primary taxonomy of General Practice Dentistry. 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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Shahen Rostamian DDS Inc Dental Clinic/Center · Sunland, CA NPI 1275038317

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-21.