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

Individual provider Internal Medicine Physician · NPI 1477569499

Douglas J Marshall, MD is an Internal Medicine in Morton, Illinois. Graduated from Southern Illinois University School of Medicine in 1992, 34 years ago. Practices with Proctor Health Systems, a 132-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
34
Trained at
Southern Illinois University School of Medicine
Licensed in
IL
In the registry since
2006
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

110 N Main St
Morton, IL 61550-2024
Phone: (309) 266-8900
Fax: (309) 263-6788
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

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

Record details

NPI number1477569499
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 31, 2006
Last updated in NPPESJuly 8, 2007
Mailing address110 N Main St, Morton, IL 61550-2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolSOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Proctor Health Systems — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Other providers in Morton