Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Roberto J Diaz, MD

Pain Medicine (Anesthesiology) Physician in San Antonio, TX · enumerated 2010 · practices at Larina V Gutenberg Do Pllc.

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

National Provider Identifier

1649591595

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Registry record

Entity type Individual (Type 1)

Name Dr. Roberto J Diaz

Credential MD

Sex Male

Practice address 5522 Lone Star Pkwy, Bldg 2, Ste 101, San Antonio, TX, 78253

Phone (210) 298-4900

Fax (210) 298-6631

Enumeration date Jun 15, 2010

Last updated in NPPES Apr 27, 2022

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License M7142 (TX) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License M7142 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
319181902	Medicaid	TX	-

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 1649591595 active?

Yes, as of the latest NPPES snapshot, NPI 1649591595 is active (record last updated 2022-04-27).

How do I verify Roberto Diaz's NPI record?

Cross-check NPI 1649591595 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Larina Gutenberg Pain Medicine (Anesthesiology) Physician · San Antonio, TX NPI 1194994681 Larina V Gutenberg Do Pllc Pain Medicine (Anesthesiology) Physician · San Antonio, TX NPI 1710253646 Adam Fish Anesthesiology Physician · San Antonio, TX NPI 1689105678

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-27.