Physician Profile
Unclaimed ProfileAbout GRASSI
Michael A Grassi, MD is a healthcare provider in Naperville, IL specializing in ophthalmology. Michael trained at Northwestern University Feinberg Medical School, graduating in 1999. Michael is also listed as specializing in ophthalmology — retina specialist. Medicare claims data shows Michael provided 7,917 services to 2,377 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (630) 995-3465
- Email not available
Practice Locations
1012 95TH ST STE 9
Naperville, IL 60564
Procedures Most Often Billed to Medicare
7,917 services · 2,377 patients · 21 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Injection of drug into eye | Procedure | 67028 |
1,000 |
| Photocoagulation treatment to prevent detachment of retina | Procedure | 67145 |
21 |
| 2d ultrasound scan of eye tissue and structures | Imaging | 76512 |
364 |
| Imaging of retina | Treatment | 92134 |
1,740 |
| Exam of visual field with extended testing | Treatment | 92083 |
649 |
| Exam of retinal blood vessels using a special camera after injection of a dye | Treatment | 92235 |
356 |
| Established patient problem focused exam of visual system | Treatment | 92012 |
224 |
| Extended exam of the back part of the eye with retinal drawing | Treatment | 92201 |
177 |
| Established patient complete exam of visual system | Treatment | 92014 |
157 |
| Exam of blood vessels between the white part of eye and retina using a special camera after injection of a dye | Treatment | 92240 |
130 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other ophthalmology specialists in Naperville 8
Same specialty, same city.
Trained at Northwestern University Feinberg Medical School 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1999 at Northwestern University Feinberg Medical School 7
Providers who graduated from the same medical school in the same year.
Also performs Injection of drug into eye 8
Providers in IL who bill this service to Medicare most often.
Common questions
What is Dr. Grassi's specialty?
Dr. Grassi is an ophthalmology in Naperville, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
Where can I find Dr. Grassi?
Dr. Grassi is listed at 1012 95TH ST STE 9, Naperville, IL 60564. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Grassi?
The number on file is (630) 995-3465. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Grassi?
Dr. Grassi's National Provider Identifier is 1689666885. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Grassi's medical education?
Dr. Grassi attended Northwestern University Feinberg Medical School, graduating in 1999. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Grassi have?
Dr. Grassi has 27 years experience. Calculated from a graduation year of 1999, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Grassi known for?
According to Medicare billing data, Dr. Grassi performs procedures including injection of drug into eye and photocoagulation treatment to prevent detachment of retina; reads or performs imaging such as 2d ultrasound scan of eye tissue and structures; provides treatments such as imaging of retina and exam of visual field with extended testing, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Grassi's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grassi. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.