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

Robert Allan Alter, MD

Individual provider Internal Medicine Physician · NPI 1821064585

Robert Allan Alter, 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

2545 S King Dr
Chicago, IL 60616-2441
Phone: (312) 842-7117
Fax: (312) 326-2102
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X (IL)
Internal Medicine Physician Taxonomy 207R00000X (IL)

Record details

NPI number1821064585
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 23, 2006
Last updated in NPPESJuly 13, 2026
Mailing address2311 W 22nd St, Suite 202, Oak Brook, IL 60523-1225

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