Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark Lytle Associates A Psychology Corporation

Clinical Psychologist in San Diego, CA · enumerated 2010 · authorized official Mark Lytle, Owner.

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

National Provider Identifier

1679875520

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Registry record

Entity type Organization (Type 2)

Legal business name Mark Lytle Associates A Psychology Corporation

Practice address 3636 4th Ave, #302, San Diego, CA, 92103

Phone (858) 566-4748

Fax (858) 566-4748

Enumeration date Nov 29, 2010

Last updated in NPPES Mar 8, 2011

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY12089 (CA) Primary

Authorized official

Name Mark Lytle

Title Owner

Phone (858) 566-4748

Other identifiers

Identifier	Type	State	Issuer
PSY120892	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.

Read the full guide → Validate an NPI →

Frequently asked questions

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.

What type of organization is Mark Lytle Associates A Psychology Corporation?

Mark Lytle Associates A Psychology Corporation is registered in NPPES as a Clinical Psychologist (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-08.