Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Diego Alfonso Valenzuela III, MD

Individual provider Internal Medicine Physician · NPI 1609526987

Dr. Diego Alfonso Valenzuela III, MD is an Internal Medicine Physician in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2022
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5841 S Maryland Ave M/c 5100
Chicago, IL 60637-1443
Phone: (773) 702-3630
Fax: (773) 753-8301
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Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036.175197 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 1609526987 (IL)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 036.175197 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1609526987
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 28, 2022
Last updated in NPPESJune 2, 2025
Certification dateJune 2, 2025

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