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Edit this profileAt a glance
- 225 N Michigan Ave, Chicago, IL 60601
About Dr. Brennan
Daniel M. Brennan, OD is an optometrist based in Chicago, IL. According to Medicare claims data, Daniel cared for 118 Medicare patients across 124 services. The services billed most often include photography of the retina, established patient complete exam of visual system, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. The provider's National Provider Identifier (NPI) is 1770006736.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (312) 819-0199
- Email not available
Practice Locations
225 N MICHIGAN AVE
Chicago, IL 60601
Conditions Commonly Evaluated or Treated
Within Optometry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Contact lens issues
Cornea conditions
Corneal issues
Eye conditions
Eye discomfort
Eye diseases
Eye infections
Eye inflammation
Eye injuries
Eye irritation
Eye surface issues
Eyelid conditions
Eyelid issues
Pediatric eye conditions
Pupil issues
Tear duct issues
Vision changes
- Blurry Vision
- Color Blindness
- Distorted Vision
- Double Vision
- Eye Floaters and Flashes
- Eye Strain
- Farsightedness
- Halos Around Lights
- Light Sensitivity
- Night Blindness
- Posterior vitreous detachment
- Tunnel Vision
- Visual Migraines
Procedures & services
Most searched procedures
Contact lens exams
- Bifocal or Multifocal Contact Lens Fitting
- Contact Lens Training
- Plano (Non-Prescription) Colored Contact Lens Exam
- Toric Contact Lens Fitting
Dry eye treatments
Examinations
- Comprehensive medical eye examination
- Diabetic Eye Exam
- DMV Vision Test
- Low Vision Assessment
- Pediatric Eye Exam
Eyelid care
Eyelid treatments
General exams
Glasses and eyewear
- Blue Light Glasses Consultation
- Eyeglass Frame Adjustment and Repair
- Prescription Sunglasses Consultation
- Prism Eyeglasses Fitting
Imaging & tests
- Color Vision Testing
- Corneal topography
- Coronary optical coherence tomography
- Eye-pressure measurement
- Pachymetry
- Retinal photography
- Visual Field Test
Imaging and scans
Minor procedures
Specialty lenses
Surgical evaluations
Tear duct procedures
Therapy
Urgent care
Vision correction
Procedures Most Often Billed to Medicare
124 services · 118 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Photography of the retina | Treatment | 92250 |
49 | As often as other peers in Optometrist |
| Established patient complete exam of visual system | Treatment | 92014 |
37 | Less often than most peers in Optometrist |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
24 | Less often than most peers in Optometrist |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
14 | Less often than most peers in Optometrist |
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.
Other optometrists at this location 7
Same specialty, same street address — most likely the same department or group.
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 optometrists in Chicago 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2017 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Photography of the retina 8
Providers in IL who bill this service to Medicare most often.
Common questions
What does Dr. Brennan specialize in?
Dr. Brennan is an optometrist in Chicago, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Brennan located?
Dr. Brennan is listed at 225 N Michigan Ave, Chicago, IL 60601. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Brennan's phone number?
The number on file is (312) 819-0199. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Brennan's NPI number?
Dr. Brennan's National Provider Identifier is 1770006736. 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
Where did Dr. Brennan go to medical school?
Dr. Brennan attended Other, graduating in 2017. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Brennan been practicing?
Dr. Brennan has 9 years experience. Calculated from a graduation year of 2017, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Brennan do most often?
According to Medicare billing data, Dr. Brennan provides treatments such as photography of the retina and established patient complete exam of visual system, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Brennan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Brennan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.