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

Mary J Atten, MD

Individual provider Internal Medicine Physician · NPI 1164436887

Mary J Atten, MD is an Internal Medicine Physician in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
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

1901 W Harrison St
Chicago, IL 60612-3714
Phone: (312) 864-6000
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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 036-081688 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-081688 (IL)

Record details

NPI number1164436887
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2006
Last updated in NPPESApril 21, 2021
Certification dateApril 21, 2021
Mailing address1213 N Sedgwick St, Chicago, IL 60610-4759

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