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

Marie Lo

Psychiatric/Mental Health Nurse Practitioner in Hanover, MD · enumerated 2015.

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

National Provider Identifier

1639540982

Verified

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Registry record

Entity type Individual (Type 1)

Name Marie Lo

Sex Female

Practice address Hanover, MD, 21076

Phone (201) 238-3796

Fax (667) 356-4252

Enumeration date Oct 13, 2015

Last updated in NPPES May 19, 2026

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

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R247223 (MD) 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

How do I verify Marie Lo's NPI record?

Cross-check NPI 1639540982 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639540982 active?

Yes, as of the latest NPPES snapshot, NPI 1639540982 is active (record last updated 2026-05-19).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-19.