Dr. Grant Comer , MD
Ophthalmology โข Ann Arbor, MI
1000 Wall St
Ann Arbor, MI 481051912
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on August 4, 2006; this date does not establish years in practice.
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Published CMS data list 2,533 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 92134 โ Imaging of retina: 1,070 service units.
- 67028 โ Injection of drug into eye: 702 service units.
- 99214 โ Established patient outpatient office visit: 456 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 8 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 133 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Prednisolone Acetate โ 46 prescription fills, including refills.
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) โ 31 prescription fills, including refills.
- Ketorolac Tromethamine โ 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 90% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 78 clinicians with data). Median for this group: 576. Middle half: 164 to 1,062.
More Medicare Part B services than 75% of clinicians listed under Ophthalmology in Michigan (2024, 512 clinicians with data). Median for this group: 1,346. Middle half: 560 to 2,503.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 2,878 in 2020 to 2,533 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
1000 Wall St
Ann Arbor, MI 481051912
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Regents Of The University Of Michigan. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Indiana University School Of Medicine
2001
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
471 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $146,315 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $105,748 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
243 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$5,350 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
25 years (graduated 2001)
CMS Doctors and Clinicians data list 2001 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Comer has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Comer as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Ann Arbor and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 90% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 78 clinicians with data). Median for this group: 576. Middle half: 164 to 1,062.
More Medicare Part B services than 75% of clinicians listed under Ophthalmology in Michigan (2024, 512 clinicians with data). Median for this group: 1,346. Middle half: 560 to 2,503.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 78 clinicians with data). Median for this group: $36,732. Middle half: $11,549 to $88,719.
Close to the middle for clinicians listed under Ophthalmology in Michigan (2024, 512 clinicians with data). Median for this group: $137,699. Middle half: $49,630 to $280,968.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 78 clinicians with data). Median for this group: $26,114. Middle half: $8,187 to $62,688.
Close to the middle for clinicians listed under Ophthalmology in Michigan (2024, 512 clinicians with data). Median for this group: $97,396. Middle half: $34,458 to $203,115.
Medicare Part D prescriptions
Fewer Part D prescriptions than 70% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 92 clinicians with data). Median for this group: 326. Middle half: 110 to 827.
Fewer Part D prescriptions than 85% of clinicians listed under Ophthalmology in Michigan (2024, 554 clinicians with data). Median for this group: 1,008. Middle half: 346 to 1,869.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Ophthalmology in Ann Arbor, MI (2024, 92 clinicians with data). Median for this group: $16,498. Middle half: $2,923 to $59,447.
A lower Part D drug cost than 80% of clinicians listed under Ophthalmology in Michigan (2024, 554 clinicians with data). Median for this group: $69,975. Middle half: $14,648 to $171,442.
128 active clinicians are listed under Ophthalmology with a practice address in Ann Arbor, MI (791 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Ann Arbor
6.2% of these 128 clinicians have the CMS telehealth indicator.
71.1% of these 128 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 12% from 2,878 in 2020 to 2,533 in 2024.
- 2020: 2,878
- 2021: 3,110
- 2022: 2,906
- 2023: 2,876
- 2024: 2,533
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Medicare-allowed amount
Medicare-allowed amount decreased 19% from $181,329 in 2020 to $146,315 in 2024.
- 2020: $181,329
- 2021: $197,596
- 2022: $181,643
- 2023: $178,892
- 2024: $146,315
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Paid by Medicare
Paid by Medicare decreased 20% from $131,676 in 2020 to $105,748 in 2024.
- 2020: $131,676
- 2021: $145,654
- 2022: $132,725
- 2023: $130,663
- 2024: $105,748
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 131 in 2020 and 133 in 2024.
- 2020: 131
- 2021: 121
- 2022: 122
- 2023: 92
- 2024: 133
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30-day fills
30-day fills varied from year to year: 225 in 2020 and 243 in 2024.
- 2020: 225
- 2021: 223
- 2022: 216
- 2023: 166
- 2024: 243
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Part D drug cost
Part D drug cost decreased 24% from $7,025 in 2020 to $5,350 in 2024.
- 2020: $7,025
- 2021: $6,318
- 2022: $5,078
- 2023: $4,773
- 2024: $5,350
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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92134
Imaging of retina
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1,070 | 428 | $133.00 | $23.46 |
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67028
Injection of drug into eye
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702 | 122 | $777.00 | $94.40 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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456 | 380 | $131.04 | $94.25 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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168 | 158 | $42.00 | $16.02 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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61 | 42 | $87.43 | $64.21 |
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92202
Extended exam of the back part of the eye with optic nerve drawing
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28 | 28 | $74.29 | $13.78 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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26 | 26 | $224.00 | $130.63 |
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92014
Established patient complete exam of visual system
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22 | 17 | $140.00 | $71.60 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Prednisolone Acetate | Prednisolone Acetate | 46 | 2,202 | $2,761.45 | 21 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 31 | 2,168 | $610.09 | 18 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 21 | 851 | $469.65 | โ |
| Latanoprost | Latanoprost | 19 | 1,001 | $319.50 | โ |
| Brimonidine Tartrate | Brimonidine Tartrate | 16 | 875 | $1,189.37 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20050907000441
MI
8729010137
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Regents Of The University Of Michigan
1500 E Medical Ctr Dr, Ann Arbor, MI 481095000
Phone: 7347644190
Regents Of The University Of Michigan
1000 Wall St, Ann Arbor, MI 481051912
Phone: 7347644190
Regents Of The University Of Michigan
7500 Challis Rd, Brighton, MI 481169416
Phone: 7347644190
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 3621 S STATE ST, ANN ARBOR, MI 481081633 (Tel: 7346475299)
NPI status registered as active in NPPES database
Registered at 1000 WALL ST, ANN ARBOR, MI 481051912 (Tel: 7347644190)
Registered at 3621 S STATE ST, 700 KMS PLACE ATTN ELLEN KAYFES, ANN ARBOR, MI 48108 (Tel: 7349362047)
Recorded as GRANT COMER, MD
Ophthalmology (license number reported to NPPES: MI 4301085267)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Ann Arbor
- Dr. Rithambara Ramachandran, MD
- Dr. Sejal Amin, MD
- Dr. Jonah Yousif, MD
- Dr. Sarah Garnai, MD
- Dr. Amanda Bicket, MD
- Dr. Zvi Kresch, MD
Mailing Address
3621 S State St
Ann Arbor, MI 481081633
Phone: 7346475299