Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Alejandra Valentina Diaz Sierra, MD

Individual provider Internal Medicine Physician · NPI 1457978512

Dr. Alejandra Valentina Diaz Sierra, MD is an Internal Medicine Physician in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2020.

Licensed in
IL
In the registry since
2020
Specialties on file
3
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

3134 N Clark St
Chicago, IL 60657-4414
Phone: (773) 880-9722
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 125.076003 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125.076003 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1457978512
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 6, 2020
Last updated in NPPESMay 2, 2023
Certification dateMay 2, 2023

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