Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Donald Michael Williams, M.D.

Pediatrics Physician in Austin, TX · enumerated 2006.

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

National Provider Identifier

1255370912

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Registry record

Entity type Individual (Type 1)

Name Donald Michael Williams

Credential M.D.

Sex Male

Practice address 313 E 12th St, Ste. 104, Austin, TX, 78701

Phone (409) 772-2222

Enumeration date Jun 6, 2006

Last updated in NPPES Dec 21, 2009

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License L5182 (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 Donald Williams?

The National Provider Identifier (NPI) for Donald Williams is 1255370912, a Type 1 (individual) record in the CMS NPPES registry.

Where does Donald Williams practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-21.