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

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1922845080

John D Ryan, MD is an Anatomic Pathology & Clinical Pathology Physician in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2024
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 3083
Chicago, IL 60637-1443
Phone: (773) 834-7708
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 125.087321 (IL)

Record details

NPI number1922845080
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 15, 2024
Last updated in NPPESMay 21, 2026
Certification dateMay 21, 2026

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