Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexandra Esther Grieb, M.D.

Hospitalist Physician in Austin, TX · enumerated 2017.

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

National Provider Identifier

1003349853

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexandra Esther Grieb

Credential M.D.

Sex Female

Practice address 919 E 32nd St, Austin, TX, 78705

Phone (512) 544-7111

Enumeration date Apr 8, 2017

Last updated in NPPES Dec 3, 2025

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License T2613 (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

Is NPI 1003349853 active?

Yes, as of the latest NPPES snapshot, NPI 1003349853 is active (record last updated 2025-12-03).

How do I verify Alexandra Grieb's NPI record?

Cross-check NPI 1003349853 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-03.