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

Dr. Mary Angela Yerkes, PH.D.

Clinical Psychologist in Palos Park, IL · enumerated 2005.

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

National Provider Identifier

1649263823

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary Angela Yerkes

Credential PH.D.

Sex Female

Practice address Palos Park, IL, 60464

Phone (708) 986-5168

Fax (844) 464-0739

Enumeration date Aug 24, 2005

Last updated in NPPES Nov 28, 2022

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 071004207 (IL) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
01635445	Other	IL	BLUE CROSS PIN

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

Is NPI 1649263823 active?

Yes, as of the latest NPPES snapshot, NPI 1649263823 is active (record last updated 2022-11-28).

How do I verify Mary Yerkes's NPI record?

Cross-check NPI 1649263823 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-28.