NPI Portal NPI Lookup & Verification

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

Ms. Mary Y Jackson, LCSW

Clinical Social Worker in Landover, MD · enumerated 2007.

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

National Provider Identifier

1629109665

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Registry record

Entity type Individual (Type 1)
Name Ms. Mary Y Jackson
Credential LCSW
Sex Female
Practice address Landover, MD, 20785
Phone (301) 306-4590
Fax (301) 880-0054
Enumeration date Mar 9, 2007
Last updated in NPPES Feb 6, 2025

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

Taxonomy & licenses

1041S0200X School Social Worker Behavioral Health & Social Service Providers · License 21387 (MD) Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 21387 (MD) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

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.
What specialty is Mary Jackson?
Mary Jackson is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-06.