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

David Michael Marks, LCPC

Mental Health Counselor in Park Ridge, IL · enumerated 2006.

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

National Provider Identifier

1255437513

Verified

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Registry record

Entity type Individual (Type 1)
Name David Michael Marks
Credential LCPC
Sex Male
Practice address Park Ridge, IL, 60068
Phone (847) 299-3400
Fax (224) 985-2115
Enumeration date Sep 15, 2006
Last updated in NPPES Dec 8, 2022

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 180-002998 (IL) Primary

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

Where does David Marks practice?
The practice location on file with NPPES is in Park Ridge, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for David Marks?
The National Provider Identifier (NPI) for David Marks is 1255437513, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-08.