Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MARK T UPTON M.D.
NPI 1114993250
Internal Medicine - Cardiovascular Disease in Chicago, IL

Q: What is the provider's specialty?

The provider's specialty is Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.

Active since February 28, 2006

233 E ERIE ST, SUITE 412, CHICAGO, IL 60611(312) 573-0973(312) 573-0973 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Dr. Mark T Upton M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK T UPTON M.D. (NPI 1114993250) is an individual cardiovascular disease provider in Chicago, Illinois and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1114993250

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. MARK T UPTONCredential: M.D.

Location Address233 E ERIE ST, SUITE 412Chicago, IL 60611-2926

Mailing Address1730 Park St, Suite 101Naperville, IL 60563-2688 · (630) 718-0200 · Fax (630) 718-0900

Phone(312) 573-0973

Fax(312) 573-0973

Sole ProprietorNo

Enumeration DateFebruary 28, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1114993250 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

233 E ERIE ST, Chicago, IL 60611

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