Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Leslie Hillyer, PSY.D PYCH ASSOC

Mental Health Counselor in Silver Spring, MD · enumerated 2010.

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

National Provider Identifier

1598073462

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Registry record

Entity type Individual (Type 1)

Name Leslie Hillyer

Credential PSY.D PYCH ASSOC

Sex Female

Practice address 8901 New Hampshire Ave, Silver Spring, MD, 20903

Phone (301) 445-7970

Fax (301) 422-5400

Enumeration date Sep 14, 2010

Last updated in NPPES Apr 12, 2018

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
589561802	Medicaid	MD	-

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 the NPI number for Leslie Hillyer?

The National Provider Identifier (NPI) for Leslie Hillyer is 1598073462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leslie Hillyer practice?

The practice location on file with NPPES is in Silver Spring, MD. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-12.