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

Leonard L Silk, PSYD

Psychologist in Langhorne, PA · enumerated 2006.

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

National Provider Identifier

1982767182

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Registry record

Entity type Individual (Type 1)

Name Leonard L Silk

Credential PSYD

Sex Male

Practice address Langhorne, PA, 19047

Phone (215) 504-8118

Fax (215) 504-8259

Enumeration date Dec 18, 2006

Last updated in NPPES Feb 13, 2019

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PS007386L (PA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
0713014000	Other	-	PERSONAL CHOICE
4491502	Other	-	AETNA HMO
001643041	Medicaid	PA	-
000769040	Other	-	HIGHMARK

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 specialty is Leonard Silk?

Leonard Silk is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-02-13.