Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Richard Arroyo-Diaz, MD

Internal Medicine Physician in Port Lavaca, TX · enumerated 2006 · practices at Memorial Medical Center.

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

National Provider Identifier

1629005418

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard Arroyo-Diaz

Credential MD

Sex Male

Practice address 1016 N Virginia St, Port Lavaca, TX, 77979

Phone (361) 552-0325

Fax (361) 552-8759

Enumeration date Jun 27, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License J3731 (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
133513502	Other	TX	GROUP MEDICAID NUMBER
126447504	Medicaid	TX	-
000H160	Other	TX	GROUP MEDICARE NUMBER

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 do I verify Richard Arroyo-Diaz's NPI record?

Cross-check NPI 1629005418 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1629005418 active?

Yes, as of the latest NPPES snapshot, NPI 1629005418 is active (record last updated 2022-07-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.