Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Graham Thomas McMahon, MD, MMSC

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1275512477

Dr. Graham Thomas McMahon, MD, MMSC is an Endocrinology, Diabetes & Metabolism Physician in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois and Massachusetts.

Licensed in
IL, MA
In the registry since
2006
Specialties on file
2
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

4025 N Sheridan Rd
Chicago, IL 60613
Phone: (773) 388-1600
Fax: (773) 388-1602
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 036.139549 (IL)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence 205297 (MA)

Record details

NPI number1275512477
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MMSC
Sole proprietorYes
NPI enumeratedJanuary 16, 2006
Last updated in NPPESJuly 23, 2021
Certification dateJuly 23, 2021

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