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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DUNCAN MARSHALL MACKENZIE
NPI 1487593976
Internal Medicine in Chicago, IL

Active since March 27, 2026PECOS Enrolled
251 E HURON ST, CHICAGO, IL 60611(312) 926-2000 Get Directions Write a Review

NPPES record last updated: June 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Duncan Marshall Mackenzie NPPES

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

DUNCAN MARSHALL MACKENZIE (NPI 1487593976) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125.087676) and active in the NPI registry since March 2026. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1487593976
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDUNCAN MARSHALL MACKENZIE
Location Address251 E HURON STChicago, IL 60611-3055
Mailing Address251 E Huron StChicago, IL 60611-3055 · (312) 926-2000
Phone(312) 926-2000
Sole ProprietorNo
Enumeration DateMarch 27, 2026
Last NPPES UpdateJune 23, 2026
NPPES CertifiedJune 23, 2026
✔ NPI 1487593976 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 125.087676
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
251 E HURON ST, Chicago, IL 60611
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Duncan Marshall Mackenzie is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60611 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

MARK WANG M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
251 E HURON ST, FEINBERG PAVILION
CHICAGO, IL 60611
Cook County (312) 503-8144
DR. MARLEY ANN DOYLE M/D.
Psychiatry & Neurology (Psychiatry)
251 E HURON ST, GALTER 3-150, C
CHICAGO, IL 60611
Cook County (312) 926-6895
CASSIDY SCHWAB MD
Anesthesiology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 695-0061
SEONG PARK
Internal Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
EMMA WALLS GREEVER MD
Emergency Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
NICOLE ELIZABETH TRUPIANO MD
Dermatology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
ASHRAF SAMHAN MD
Internal Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
DR. SABINA SPIGNER MD, MS, MPH
Obstetrics & Gynecology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000

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 Duncan Mackenzie's NPI number?

The NPI number for Duncan Mackenzie is 1487593976. It was assigned to this individual provider in the NPPES registry on March 27, 2026.

Where is Duncan Mackenzie located?

Duncan Mackenzie practices at 251 E Huron St, Chicago, IL 60611. The listed phone number is (312) 926-2000.

What is Duncan Mackenzie's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Duncan Mackenzie enrolled in Medicare?

Yes. Duncan Mackenzie is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Duncan Mackenzie was last updated on June 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 days 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.