Dr. Gary I Markowitz , MD
Ophthalmology • Dover, DE
833 S Governors Ave
Dover, DE 199044158
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 February 17, 2006; this date does not establish years in practice.
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Published CMS data list 3,400 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Published rows only; this is not a quality measure.
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Published Part B service records, 2017:
- 99213 — Established patient outpatient office visit: 787 service units.
- 99214 — Established patient outpatient office visit: 700 service units.
- 92134 — Imaging of retina: 599 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See all 15 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 63 Medicare Part D prescriptions, including refills, in 2019.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2019. Published rows only; this is not a quality measure.
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Published Part D records, 2019:
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) — 26 prescription fills, including refills.
- Latanoprost — 23 prescription fills, including refills.
- Timolol Maleate — 14 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2019. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 3,204 in 2015 to 63 in 2019.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2015–2019.
Practice Location & Contact Primary Location
833 S Governors Ave
Dover, DE 199044158
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $419,362 in 2017
The total amount Medicare approved for these services in 2017. 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 – by Provider and Service, 2017.
Paid by Medicare
About $305,264 in 2017
The part of the Medicare-allowed amount that Medicare itself paid in 2017, 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 – by Provider and Service, 2017.
30-day fills
144 standardized 30-day fills in 2019
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
$1,913 in 2019
The total cost of these prescriptions in 2019, 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 – by Provider and Drug, 2019.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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, “Does your provider accept Medicare as full payment?”
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.
Compared with the same specialty in Dover and Delaware
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Markowitz are from 2017.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Markowitz are from 2019.
6 active clinicians are listed under Ophthalmology with a practice address in Dover, DE (65 in Delaware).
Addresses are self-reported to NPPES and may be out of date.
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
CMS data for Medicare Part B services are available for 2017 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2017 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2017 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 98% from 3,204 in 2015 to 63 in 2019.
- 2015: 3,204
- 2016: 3,827
- 2017: 1,884
- 2018: 536
- 2019: 63
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30-day fills
30-day fills decreased 97% from 5,152 in 2015 to 144 in 2019.
- 2015: 5,152
- 2016: 6,147
- 2017: 3,438
- 2018: 1,069
- 2019: 144
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Part D drug cost
Part D drug cost decreased 100% from $454,282 in 2015 to $1,913 in 2019.
- 2015: $454,282
- 2016: $549,754
- 2017: $276,171
- 2018: $81,516
- 2019: $1,913
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2019), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016 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 – by Provider and Service data, 2017; 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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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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787 | 570 | $171.22 | $71.68 |
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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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700 | 628 | $247.35 | $104.90 |
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92134
Imaging of retina
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599 | 379 | $380.00 | $40.16 |
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92014
Established patient complete exam of visual system
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271 | 270 | $200.00 | $120.56 |
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92083
Exam of visual field with extended testing
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206 | 197 | $211.00 | $60.79 |
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92133
Imaging of optic nerve
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192 | 183 | $380.00 | $36.99 |
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92250
Photography of the retina
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138 | 138 | $170.00 | $65.01 |
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66984
Removal of cataract with insertion of prosthetic lens
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133 | 83 | $3000.00 | $616.81 |
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92136
Measurement of corneal curvature and depth of eye
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132 | 87 | $428.00 | $66.63 |
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J0178
Injection, aflibercept, 1 mg
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90 | 26 | $1050.00 | $963.67 |
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67028
Injection of drug into eye
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51 | 32 | $450.00 | $100.88 |
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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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48 | 48 | $306.00 | $161.73 |
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66821
Removal of recurring cataract in lens capsule using a laser
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25 | 24 | $1200.00 | $314.98 |
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92004
New patient complete exam of visual system
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17 | 17 | $240.00 | $145.99 |
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66821
Removal of recurring cataract in lens capsule using a laser
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11 | 11 | $1200.00 | $306.44 |
Source: CMS Part B by Provider and Service, 2017; 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 2019.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 26 | 2,145 | $1,078.30 | 12 |
| Latanoprost | Latanoprost | 23 | 1,201 | $713.62 | 13 |
| Timolol Maleate | Timolol Maleate | 14 | 900 | $120.71 | — |
Source: CMS Part D by Provider and Drug, 2019; 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
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Optometrist
Doctor of Optometry
Ophthalmology
Doctor of Osteopathic Medicine (D.O.)
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Career & Practice History
NPI enumerated February 17, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Ophthalmology Specialists in Dover
Healthcare providers in DoverMailing Address
833 S Governors Ave
Dover, DE 199044158
Phone: 3026741121