Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Jean Williams, M.D.

Psychiatry Physician in Laredo, TX · enumerated 2006.

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

National Provider Identifier

1780611384

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Registry record

Entity type Individual (Type 1)

Name Margaret Jean Williams

Credential M.D.

Sex Female

Practice address 1500 Pappas St, Laredo, TX, 78041

Phone (956) 794-3000

Enumeration date Jun 27, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License G7742 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Margaret Williams?

The National Provider Identifier (NPI) for Margaret Williams is 1780611384, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Williams practice?

The practice location on file with NPPES is in Laredo, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Border Region Mhmr Community Center Rehabilitation Clinic/Center · Laredo, TX NPI 1487651733 Border Region Mh Mr Community Center Psychiatry Physician · Laredo, TX NPI 1124060173 James Manshardt Psychiatry Physician · Laredo, TX NPI 1396835104 Border Region Mhmr Community Center Developmentally Disabled Services Day Training Agency · Laredo, TX NPI 1144309709 Border Region Mhmr Community Center Developmentally Disabled Services Day Training Agency · Laredo, TX NPI 1871662643 Border Region Mhmr Community Center Intellectual Disabilities Intermediate Care Facility · Laredo, TX NPI 1922173988 Border Region Mhmr Community Center Intellectual Disabilities Intermediate Care Facility · Laredo, TX NPI 1831264894 Border Region Mhmr Community Center Intellectual Disabilities Intermediate Care Facility · Laredo, TX NPI 1740355700

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.