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

Dr. Marjorie Simpson, PHD, CRNP

Gerontology Nurse Practitioner in Westminster, MD · enumerated 2006.

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

National Provider Identifier

1083686448

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Registry record

Entity type Individual (Type 1)

Name Dr. Marjorie Simpson

Credential PHD, CRNP

Sex Female

Practice address Westminster, MD, 21158

Phone (410) 218-4786

Fax (410) 795-0029

Enumeration date Feb 1, 2006

Last updated in NPPES Oct 8, 2018

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

Taxonomy & licenses

363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R108131 (MD) Primary

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

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

How do I verify Marjorie Simpson's NPI record?

Cross-check NPI 1083686448 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083686448 active?

Yes, as of the latest NPPES snapshot, NPI 1083686448 is active (record last updated 2018-10-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-08.