Dr. John D Ryan , MD
Pathology - Anatomic Pathology & Clinical Pathology • Chicago, IL
Professional Overview & Biography Verified Profile Summary
Dr. John Ryan, MD is a registered healthcare professional specializing in Pathology - Anatomic Pathology & Clinical Pathology in Chicago, IL. Practice services are available at 5841 S MARYLAND AVE under active NPI credentials.
Practice Location & Contact Primary Location
5841 S Maryland Ave
M/c 3083
Chicago, IL 606371443
Specialty Benchmarks & Practice Insights
Comparative analytics for Pathology - Anatomic Pathology & Clinical Pathology in Chicago, IL
Practicing in Chicago, IL (831 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-05-21NUCC Taxonomy Code: 207ZP0102X
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Pathology - Anatomic Pathology & Clinical Pathology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Recorded as JOHN RYAN, MD
Pathology (License #125.087321 in IL)
Registered at 5841 S MARYLAND AVE, M/C 3083, CHICAGO, IL 606371443 (Tel: 7738347708)
Registered at 180 HARVESTER DR STE 110, BURR RIDGE, IL 605276686 (Tel: 7737021150)
Registered at 340 W 10TH ST STE 6200, INDIANAPOLIS, IN 462023082 (Tel: 3172748157)
NPI status registered as active in NPPES database
Registered at 550 UNIVERSITY BLVD, INDIANAPOLIS, IN 462025149 (Tel: 3179445000)
Registered at 635 BARNHILL DR # MS 207, INDIANAPOLIS, IN 462025126
Recorded as JOHN RYAN
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
180 Harvester Dr Ste 110
Burr Ridge, IL 605276686
Phone: 7737021150
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