Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Alejandro De Los Santos

Internal Medicine Physician in Tyler, TX · enumerated 2008.

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

National Provider Identifier

1558527846

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Registry record

Entity type Individual (Type 1)

Name Alejandro De Los Santos

Sex Male

Practice address Tyler, TX, 75701

Phone (903) 606-4129

Enumeration date Aug 6, 2008

Last updated in NPPES Jul 24, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 00000 (PR) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License P4300 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License P4300 (TX) Primary

Other identifiers

Identifier	Type	State	Issuer
P01105290	Other	TX	MEDICARE RAIL ROAD

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

What is the NPI number for Alejandro De Los Santos?

The National Provider Identifier (NPI) for Alejandro De Los Santos is 1558527846, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alejandro De Los Santos practice?

The practice location on file with NPPES is in Tyler, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Michael Gorby Internal Medicine Physician · Tyler, TX NPI 1366446049 Mother Frances Hospital Regional Health Care Center General Acute Care Hospital · Tyler, TX NPI 1679578439 Vicki Fox Acute Care Nurse Practitioner · Tyler, TX NPI 1649277138 James Collier Certified Registered Nurse Anesthetist · Tyler, TX NPI 1740288117 Robert Lueken Undersea and Hyperbaric Medicine (Emergency Medicine) Physician · Tyler, TX NPI 1649271677 Richard Wilson Internal Medicine Physician · Tyler, TX NPI 1609877000 Continuecare Hospital of Tyler, Inc. Long Term Care Hospital · Tyler, TX NPI 1174524466 Justin Hooper Pharmacist · Tyler, TX NPI 1215939046

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-24.