Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Gregory Keilin, PH.D.

Psychologist in Austin, TX · enumerated 2005.

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

National Provider Identifier

1326041120

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Registry record

Entity type Individual (Type 1)

Name Dr. William Gregory Keilin

Credential PH.D.

Sex Male

Practice address 3355 Bee Caves Rd, Ste 104, Austin, TX, 78746

Phone (512) 327-6441

Enumeration date May 24, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 24176 (TX) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

What is the NPI number for William Keilin?

The National Provider Identifier (NPI) for William Keilin is 1326041120, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Keilin 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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Andrea Michael Marriage & Family Therapist · Austin, TX NPI 1528167525 Tammy Clouston Clinical Social Worker · West Lake Hills, TX NPI 1760705388 David Kaplowitz Marriage & Family Therapist · West Lake Hills, TX NPI 1306158753 Hello Mental Health Clinical Social Worker · West Lake Hills, TX NPI 1831402353 Meredith Tompkins Psychiatric/Mental Health Nurse Practitioner · West Lake Hills, TX NPI 1104258169 Margaret Hill Counseling Clinical Social Worker · West Lake Hills, TX NPI 1598195166 Virginia Garay, M.D., P.A. Psychiatry Physician · West Lake Hills, TX NPI 1760804124 Amc Wellness Counseling Community/Behavioral Health Agency · West Lake Hills, TX NPI 1487051835

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