NPI Portal NPI Lookup & Verification

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

Ms. Marjorie Yolanda Leon, CPNP-PC

Pediatric Nurse Practitioner in Middletown, NY · enumerated 2012.

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

National Provider Identifier

1598011421

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Registry record

Entity type Individual (Type 1)
Name Ms. Marjorie Yolanda Leon
Credential CPNP-PC
Sex Female
Practice address Middletown, NY, 10941
Phone (914) 493-8431
Fax (914) 493-3166
Enumeration date Jul 30, 2012
Last updated in NPPES Mar 15, 2023

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 659587 (NY) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 383039 (NY) Secondary
363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 383039 (NY) Primary

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 1598011421 active?
Yes, as of the latest NPPES snapshot, NPI 1598011421 is active (record last updated 2023-03-15).
How do I verify Marjorie Leon's NPI record?
Cross-check NPI 1598011421 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 2023-03-15.