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

Dr. Ross Howard McMillan, MD

Individual provider Gastroenterology Physician · NPI 1578099578

Dr. Ross Howard McMillan, MD is a Gastroenterology in Chicago, Illinois. Graduated from Johns Hopkins University School of Medicine in 2018, 8 years ago. Practices with University of Chicago, a 1,681-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
8
Trained at
Johns Hopkins University School of Medicine
Licensed in
IL
In the registry since
2017
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

5841 S Maryland Ave
Chicago, IL 60637-1443
Phone: (888) 824-0200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 036156732 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036156732 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1578099578
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 11, 2017
Last updated in NPPESSeptember 5, 2025
Certification dateSeptember 5, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice University Of Chicago — 1681 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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