NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Robin G. Sontheimer, Pllc

Clinical Social Worker in Austin, TX · enumerated 2018 · authorized official Robin Sontheimer, Lcsw/Practice Owner.

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

National Provider Identifier

1861989659

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Robin G. Sontheimer, Pllc
Other name <Unavail>
Practice address 5900 Balcones Drive, Suite 100, Austin, TX, 78731
Enumeration date Apr 17, 2018
Last updated in NPPES Oct 26, 2023

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Authorized official

Name Robin Sontheimer
Title Lcsw/Practice Owner

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2023-10-26. Verify at npiregistry.cms.hhs.gov.
Where is Robin G. Sontheimer, Pllc located?
The practice location on file with NPPES is in Austin, TX.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-26.