Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allan S. Wirtzer

Q: What type of organization is Allan S. Wirtzer?

Allan S. Wirtzer is registered in NPPES as a Ambulatory Surgical Clinic/Center (its primary provider taxonomy).

Ambulatory Surgical Clinic/Center in Sherman Oaks, CA · enumerated 2006 · authorized official Allan Wirtzer, Medical Director.

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

National Provider Identifier

1295792505

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Registry record

Entity type Organization (Type 2)

Legal business name Allan S. Wirtzer

Other name <Unavail>

Practice address 4836 Van Nuys Blvd, Sherman Oaks, CA, 91403

Phone (818) 907-7546

Fax (818) 907-9506

Enumeration date Apr 28, 2006

Last updated in NPPES Nov 13, 2008

Taxonomy & classification

261QA1903X Ambulatory Surgical Clinic/Center Ambulatory Health Care Facilities · License 261QA1903X (CA) Primary

Authorized official

Name Allan Wirtzer

Title Medical Director

Phone (818) 907-7546

Other identifiers

Identifier	Type	State	Issuer
1326003161	Other	CA	ALLAN S. WIRTZER MD, MEDICAL DIRECTOR NPI#

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 Allan S. Wirtzer?

Allan S. Wirtzer is registered in NPPES as a Ambulatory Surgical Clinic/Center (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 2008-11-13.