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

Merrick Donenberg, MD

Individual provider Internal Medicine Physician · NPI 1457647133

Merrick Donenberg, MD is a Cardiovascular Disease (Cardiology) in Ottawa, Illinois. Graduated from Rush Medical College of Rush University in 2011, 15 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
15
Trained at
Rush Medical College of Rush University
Licensed in
IL
In the registry since
2011
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1050 E Norris Dr Ste 2C
Ottawa, IL 61350-1611
Phone: (815) 434-0276
Fax: (815) 434-0319
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 036135131 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036135131 (IL)

Record details

NPI number1457647133
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 21, 2011
Last updated in NPPESJuly 17, 2025
Certification dateJuly 17, 2025
Mailing address1050 E. Norris Dr., Suite 2c, Ottwaw, IL 61350

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2011 (15 years in practice)
Group practice Osf Multi-Specialty Group — 2128 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Other providers in Ottawa