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

Dr. Michael A Grassi, MD

Individual provider Retina Specialist (Ophthalmology) Physician · NPI 1689666885

Dr. Michael A Grassi, MD is an Ophthalmology in Naperville, Illinois. Graduated from Northwestern University Feinberg Medical School in 1999, 27 years ago. Accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
27
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2005
Specialties on file
2
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

1012 95th St Ste 9
Naperville, IL 60564-5040
Phone: (630) 995-3465
Fax: (630) 995-3622
Show map & directions

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

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 036115845 (IL)
Retina Specialist (Ophthalmology) Physician Taxonomy 207WX0107X · Licence 036115845 (IL)

Record details

NPI number1689666885
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 16, 2005
Last updated in NPPESMarch 10, 2025
Certification dateMarch 10, 2025
Mailing address1012 95th St Ste 9, Naperville, IL 60564-5040

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1999 (27 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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