Mark E Sharp Phd PC in Oak Brook, IL

This organization bills under NPI 1033387451, an organization record issued on Feb 19, 2008 with the primary taxonomy Clinical Psychologist. Each clinician who works there has their own NPI and license.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Organization recordNPPES, Aug 2026

1033387451

Legal name: Mark E Sharp Phd PC
Entity: Type 2 · organization
Primary taxonomy: Clinical Psychologist 103TC0700X
Practice location: 1010 JORIE BLVD SUITE 246, Oak Brook, IL 60523
Phone: 630-230-6358
Enumerated: Feb 19, 2008
Record updated: Feb 19, 2008
Authorized official: Clinical Psychologist (title as filed)

Public record from the NPPES NPI Registry (open it on CMS). An NPI identifies who bills; it is not a facility license.

Checking an organization

Confirm the business with the Illinois secretary of state.
Check the HHS-OIG exclusion list for the organization.
Verify each clinician on their own record and the state license search.

Common questions

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.