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

Mrs. Amy Williamson, R.D.

Registered Dietitian in Katy, TX · enumerated 2012.

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

National Provider Identifier

1639425549

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Registry record

Entity type Individual (Type 1)

Name Mrs. Amy Williamson

Credential R.D.

Sex Female

Practice address Katy, TX, 77494

Phone (281) 773-4791

Enumeration date Jul 29, 2012

Last updated in NPPES Jul 29, 2012

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

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 918076 (TX) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD 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

Where does Amy Williamson practice?

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

What is the NPI number for Amy Williamson?

The National Provider Identifier (NPI) for Amy Williamson is 1639425549, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-29.