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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

COURTNEY L SLATER LLC
NPI 1528980299
Psychologist - Clinical in Philadelphia, PA

Active since July 27, 2026
1420 WALNUT ST STE 1010, PHILADELPHIA, PA 19102(267) 225-1522 Get Directions Write a Review

NPPES record added: July 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Courtney L Slater Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

COURTNEY L SLATER LLC (NPI 1528980299) is a healthcare organization registered as a clinical in Philadelphia, Pennsylvania and active in the NPI registry since July 2026. The organization lists Courtney L Slater, Psychologist, as its authorized official.

NPPES Registry Identity

NPI1528980299
Entity TypeOrganization
Primary Taxonomy103TC0700X
Legal Business NameCOURTNEY L SLATER LLC
Location Address1420 WALNUT ST STE 1010Philadelphia, PA 19102-4010
Mailing Address1420 Walnut St Ste 1010Philadelphia, PA 19102-4010 · (267) 225-1522
Phone(267) 225-1522
Organization SubpartNo
Authorized OfficialCourtney L SlaterPsychologist · (267) 225-1522
Enumeration DateJuly 27, 2026
NPPES CertifiedJuly 27, 2026
✔ NPI 1528980299 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
1420 WALNUT ST STE 1010, Philadelphia, PA 19102
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

COURTNEY L SLATER PHD
Psychologist (Clinical)
1420 WALNUT ST STE 1010
PHILADELPHIA, PA 19102
Philadelphia County (267) 225-1522
MS. MARGAUX HART KETNER MA
Counselor (Mental Health)
1420 WALNUT ST STE 1010
PHILADELPHIA, PA 19102
Philadelphia County (267) 587-7006

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Courtney L Slater LLC's NPI number?

The NPI number for Courtney L Slater LLC is 1528980299. It was assigned to this organization in the NPPES registry on July 27, 2026.

Where is Courtney L Slater LLC located?

Courtney L Slater LLC is located at 1420 Walnut St Ste 1010, Philadelphia, PA 19102. The listed phone number is (267) 225-1522.

What is Courtney L Slater LLC's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Courtney L Slater LLC was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.