MARK EUGENE ZAJACKOWSKI MD
NPI 1578857264
General Practice in Chicago, IL

Q: What is Mark Zajackowski's NPI number?

The NPI number for Mark Zajackowski is 1578857264. It was assigned to this individual provider in the NPPES registry on May 31, 2011.

Q: What is Mark Zajackowski's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Zajackowski was last updated on May 31, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 31, 2011

5445 N SHERIDAN RD, #3102, CHICAGO, IL 60640(773) 271-0609 Get Directions Write a Review

NPPES record last updated: May 31, 2011. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Mark Eugene Zajackowski Md NPPES

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

MARK EUGENE ZAJACKOWSKI MD (NPI 1578857264) is an individual general practice provider in Chicago, Illinois, licensed in Illinois (036-051907) and active in the NPI registry since May 2011.

NPPES Registry Identity

NPI1578857264

Entity TypeIndividualMale

Primary Taxonomy208D00000X

Provider Legal NameMARK EUGENE ZAJACKOWSKICredential: MD

Location Address5445 N SHERIDAN RD, #3102Chicago, IL 60640-1957

Mailing Address5445 N Sheridan Rd, #3102Chicago, IL 60640-1957 · (773) 271-0609

Phone(773) 271-0609

Sole ProprietorYes

Enumeration DateMay 31, 2011

✔ NPI 1578857264 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians

Taxonomy Code208D00000X

License✔ Licensed in IL · 036-051907

Definition

A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

5445 N SHERIDAN RD, Chicago, IL 60640

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Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ATHENOS MEDICAL DIAGNOSTICS, LTD

Pain Medicine (Interventional Pain Medicine)

5445 N SHERIDAN RD, SUITE 512
CHICAGO, IL 60640

Cook County (312) 804-8910

LUCYNA SOBCZAK PT

Physical Therapist

5445 N SHERIDAN RD, APT 1502
CHICAGO, IL 60640

Cook County (177) 378-4145

SUSAN LEIGHTON CLARK LCSW

Social Worker (Clinical)

5445 N SHERIDAN RD, #1001
CHICAGO, IL 60640

Cook County (773) 597-7388

DR. AJAY KUMAR DAS M.D.

Family Medicine

5445 N SHERIDAN RD, UNIT 1015
CHICAGO, IL 60640

Cook County (773) 350-5306

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Zajackowski's NPI number?

The NPI number for Mark Zajackowski is 1578857264. It was assigned to this individual provider in the NPPES registry on May 31, 2011.

Where is Mark Zajackowski located?

Mark Zajackowski practices at 5445 N Sheridan Rd #3102, Chicago, IL 60640. The listed phone number is (773) 271-0609.

What is Mark Zajackowski's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

When was this NPI record last updated?

The NPPES record for Mark Zajackowski was last updated on May 31, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.