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

Dr. John M Hahn, MD

Individual provider Ophthalmology Physician · NPI 1548260961

Dr. John M Hahn, MD is an Ophthalmology in Sterling, Illinois. Graduated from Northwestern University Feinberg Medical School in 1997, 29 years ago. Practices with Cgh Medical Center, a 201-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
29
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2005
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

10 W 3rd St
Sterling, IL 61081-3503
Phone: (815) 625-4790
Show map & directions

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

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 036-124630 (IL)

Record details

NPI number1548260961
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2005
Last updated in NPPESAugust 9, 2012
Mailing address101 E Miller Rd, Sterling, IL 61081-1252

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1997 (29 years in practice)
Group practice Cgh Medical Center — 201 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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