Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Aaron G. Coates, MD

Individual provider Internal Medicine Physician · NPI 1871603050

Aaron G. Coates, MD practises Internal Medicine in Rockford, Illinois. Graduated from Hahnemann University College of Medicine in 1997, 29 years ago. Practices with Rockford Health Physicians, a 521-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
29
Trained at
Hahnemann University College 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

3401 N Perryville Rd
Rockford, IL 61114-8011 Not confirmed with CMS for 16 years — call before visiting
Phone: (815) 971-2000
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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 · Licence 036-103278 (IL)

Record details

NPI number1871603050
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESJanuary 20, 2010

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolHAHNEMANN UNIVERSITY COLLEGE OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Rockford Health Physicians — 521 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients356
Services billed 965 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Rockford Health Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 521 clinicians in the practice; 12 are shown here.

Other providers in Rockford