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

Dr. Andrew Vincent Shack, PH.D.

Clinical Psychologist in Oak Park, IL · enumerated 2006 · practices at Maria Cecilia Dahn, M.D..

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

National Provider Identifier

1659327229

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Registry record

Entity type Individual (Type 1)
Name Dr. Andrew Vincent Shack
Credential PH.D.
Sex Male
Practice address Oak Park, IL, 60301
Phone (708) 386-8112
Fax (708) 383-4298
Enumeration date May 25, 2006
Last updated in NPPES Feb 27, 2014

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 071-006231 (IL) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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

Is NPI 1659327229 active?
Yes, as of the latest NPPES snapshot, NPI 1659327229 is active (record last updated 2014-02-27).
How do I verify Andrew Shack's NPI record?
Cross-check NPI 1659327229 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-27.