Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Javier Alvarez, M.D.

Allergy & Immunology Physician in Austin, TX · enumerated 2010.

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

National Provider Identifier

1558672691

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Javier Alvarez

Credential M.D.

Sex Male

Practice address 708 W. Ben White Blvd Ste. 220, Austin, TX, 78704

Phone (737) 272-0600

Fax (512) 406-7312

Enumeration date Jun 23, 2010

Last updated in NPPES Mar 27, 2026

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License Q2725 (TX) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License R72163 (AZ) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 0116024001 (VA) Secondary

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 1558672691 active?

Yes, as of the latest NPPES snapshot, NPI 1558672691 is active (record last updated 2026-03-27).

How do I verify Alexander Alvarez's NPI record?

Cross-check NPI 1558672691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-27.