Dr. Derek Hunter Ohlstein , MD
Ophthalmology • Vero Beach, FL
3500 Us Highway 1
Vero Beach, FL 329604511
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 May 26, 2009; this date does not establish years in practice.
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Published CMS data list 6,167 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 1,364 service units.
- 68761 — Closure of tear duct opening using plug: 911 service units.
- 92014 — Established patient complete exam of visual system: 706 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 23 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 2,223 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost — 481 prescription fills, including refills.
- Timolol Maleate — 274 prescription fills, including refills.
- Tobramycin-Dexamethasone (Tobramycin/Dexamethasone) — 245 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 32 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 13 clinicians with data). Median for this group: 5,817. Middle half: 1,420 to 7,737.
More Medicare Part B services than 80% of clinicians listed under Ophthalmology in Florida (2024, 1,014 clinicians with data). Median for this group: 2,174. Middle half: 801 to 4,691.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 3,974 in 2020 to 6,167 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
3500 Us Highway 1
Vero Beach, FL 329604511
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: William J. Mallon, Md. 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
Tulane University School Of Medicine
2009
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
1,634 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 – by Provider, 2024.
Medicare-allowed amount
About $663,402 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 – by Provider and Service, 2024.
Paid by Medicare
About $484,187 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 – by Provider and Service, 2024.
30-day fills
3,596 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
$211,195 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $565.09 across 15 records.
By nature of payment
- Food and Beverage: $565.09 across 15 records.
Reporting-company totals (3 largest of 9)
- RxSight Inc: $144.20 across 1 record.
- Bausch & Lomb Americas Inc.: $133.42 across 3 records.
- Regeneron Pharmaceuticals, Inc.: $76.40 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
17 years (graduated 2009)
CMS Doctors and Clinicians data list 2009 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
2009
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, “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.
Enrolled in Medicare (PECOS)
Dr. Ohlstein 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. Ohlstein 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 Vero Beach and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 13 clinicians with data). Median for this group: 5,817. Middle half: 1,420 to 7,737.
More Medicare Part B services than 80% of clinicians listed under Ophthalmology in Florida (2024, 1,014 clinicians with data). Median for this group: 2,174. Middle half: 801 to 4,691.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 13 clinicians with data). Median for this group: $599,002. Middle half: $161,043 to $885,440.
A higher Medicare-allowed amount than 80% of clinicians listed under Ophthalmology in Florida (2024, 1,014 clinicians with data). Median for this group: $239,067. Middle half: $86,567 to $537,508.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 13 clinicians with data). Median for this group: $444,557. Middle half: $127,235 to $653,074.
A higher Medicare payment amount than 80% of clinicians listed under Ophthalmology in Florida (2024, 1,014 clinicians with data). Median for this group: $175,260. Middle half: $61,464 to $390,296.
Medicare Part D prescriptions
More Part D prescriptions than 60% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 12 clinicians with data). Median for this group: 1,808. Middle half: 655 to 2,590.
More Part D prescriptions than 70% of clinicians listed under Ophthalmology in Florida (2024, 1,099 clinicians with data). Median for this group: 1,203. Middle half: 442 to 2,490.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Ophthalmology in Vero Beach, FL (2024, 12 clinicians with data). Median for this group: $172,121. Middle half: $70,459 to $215,061.
A higher Part D drug cost than 65% of clinicians listed under Ophthalmology in Florida (2024, 1,099 clinicians with data). Median for this group: $114,958. Middle half: $23,858 to $310,282.
17 active clinicians are listed under Ophthalmology with a practice address in Vero Beach, FL (1,582 in Florida).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Vero Beach
0% of these 17 clinicians have the CMS telehealth indicator.
70.6% of these 17 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 increased 55% from 3,974 in 2020 to 6,167 in 2024.
- 2020: 3,974
- 2021: 5,155
- 2022: 5,156
- 2023: 5,313
- 2024: 6,167
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Medicare-allowed amount
Medicare-allowed amount increased 58% from $420,178 in 2020 to $663,402 in 2024.
- 2020: $420,178
- 2021: $578,450
- 2022: $595,203
- 2023: $634,329
- 2024: $663,402
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Paid by Medicare
Paid by Medicare increased 55% from $312,248 in 2020 to $484,187 in 2024.
- 2020: $312,248
- 2021: $423,472
- 2022: $432,782
- 2023: $466,310
- 2024: $484,187
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 30% from 1,712 in 2020 to 2,223 in 2024.
- 2020: 1,712
- 2021: 1,803
- 2022: 1,825
- 2023: 1,847
- 2024: 2,223
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30-day fills
30-day fills increased 26% from 2,851 in 2020 to 3,596 in 2024.
- 2020: 2,851
- 2021: 3,152
- 2022: 3,159
- 2023: 3,089
- 2024: 3,596
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Part D drug cost
Part D drug cost decreased 19% from $260,741 in 2020 to $211,195 in 2024.
- 2020: $260,741
- 2021: $228,492
- 2022: $227,787
- 2023: $216,938
- 2024: $211,195
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $706.10 in 2021 to $565.09 in 2025.
- 2021: $706.10
- 2022: $520.06
- 2023: $682.75
- 2024: $442.42
- 2025: $565.09
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 15 records totaling $565.09.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| RxSight Inc |
Food and Beverage
In-kind items and services
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RXSIGHT CONTACT LENS | General | $144.20 |
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
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enVista Envy IOL | General | $97.58 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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DURYSTA | General | $32.95 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
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Rocklatan | General | $30.47 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
EYLEA HD | General | $29.85 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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XDEMVY | General | $28.80 |
| Mallinckrodt Hospital Products Inc. |
Food and Beverage
In-kind items and services
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ACTHAR | General | $28.02 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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XDEMVY | General | $26.50 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
EYLEA HD | General | $25.82 |
| Mallinckrodt Hospital Products Inc. |
Food and Beverage
In-kind items and services
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ACTHAR | General | $24.46 |
| Harrow Eye, LLC |
Food and Beverage
In-kind items and services
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VEVYE | General | $22.56 |
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
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VYZULTA | General | $21.93 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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EYLEA HD | General | $20.73 |
| Genentech, Inc. |
Food and Beverage
In-kind items and services
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Vabysmo | General | $17.31 |
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
|
XIIDRA | General | $13.91 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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, 2017–2024; 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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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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1,364 | 742 | $262.10 | $129.10 |
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68761
Closure of tear duct opening using plug
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911 | 194 | $292.93 | $108.33 |
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92014
Established patient complete exam of visual system
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706 | 674 | $251.74 | $123.71 |
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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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702 | 521 | $185.85 | $91.59 |
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92133
Imaging of optic nerve
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652 | 591 | $73.17 | $35.78 |
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92083
Exam of visual field with extended testing
|
321 | 311 | $126.83 | $62.38 |
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92134
Imaging of retina
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281 | 236 | $80.98 | $39.45 |
|
68841
Insertion of drug delivery implant into tear duct of eye
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164 | 90 | $75.01 | $16.15 |
|
66984
Removal of cataract with insertion of prosthetic lens
|
142 | 79 | $1095.42 | $537.15 |
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66821
Removal of recurring cataract in lens capsule using a laser
|
140 | 97 | $500.93 | $307.57 |
|
67820
Removal of eyelashes using forceps
|
108 | 83 | $53.88 | $18.85 |
|
92136
Measurement of corneal curvature and depth of eye
|
102 | 100 | $93.77 | $45.51 |
|
76514
Ultrasound scan of cornea to determine thickness
|
99 | 95 | $23.58 | $11.05 |
|
92250
Photography of the retina
|
95 | 91 | $74.53 | $36.57 |
|
99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
94 | 94 | $339.61 | $169.95 |
|
65855
Laser repair to improve eye fluid flow
|
71 | 50 | $400.00 | $204.76 |
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92285
Photography of content of eyes
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64 | 60 | $47.37 | $23.22 |
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92004
New patient complete exam of visual system
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61 | 61 | $295.41 | $146.94 |
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68760
Repair tear duct opening by heat, tying, or laser surgery
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24 | 12 | $440.59 | $167.20 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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24 | 24 | $228.97 | $113.46 |
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92132
Imaging of front third of eye
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18 | 16 | $63.23 | $30.88 |
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65205
Removal of foreign body from external eye (conjunctiva)
|
13 | 13 | $57.79 | $27.38 |
|
65222
Removal of foreign body in cornea using slit lamp
|
11 | 11 | $136.54 | $64.30 |
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 |
|---|---|---|---|---|---|
| Latanoprost | Latanoprost | 481 | 26,982 | $5,634.07 | 139 |
| Timolol Maleate | Timolol Maleate | 274 | 17,173 | $2,562.85 | 100 |
| Tobramycin-Dexamethasone | Tobramycin/Dexamethasone | 245 | 5,442 | $7,164.60 | 222 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 123 | 8,449 | $3,420.03 | 35 |
| Prednisolone Acetate | Prednisolone Acetate | 103 | 4,071 | $4,993.64 | 66 |
| Lorazepam | Lorazepam | 99 | 206 | $124.49 | 87 |
| Brimonidine Tartrate | Brimonidine Tartrate | 96 | 6,006 | $1,545.06 | 33 |
| Dexamethasone Sodium Phosphate | Dexamethasone Sodium Phosphate | 93 | 2,498 | $3,379.22 | 37 |
| Moxifloxacin | Moxifloxacin Hcl | 74 | 1,453 | $995.29 | 50 |
| Lumigan | Bimatoprost | 61 | 3,074 | $33,668.00 | 14 |
| Loteprednol Etabonate | Loteprednol Etabonate | 60 | 1,814 | $11,570.82 | 25 |
| Erythromycin | Erythromycin Base | 55 | 940 | $432.70 | 44 |
| Restasis | Cyclosporine | 47 | 2,490 | $42,477.05 | 17 |
| Alrex | Loteprednol Etabonate | 41 | 1,289 | $11,595.42 | 12 |
| Brimonidine Tartrate-Timolol | Brimonidine Tartrate/Timolol | 39 | 2,632 | $5,464.92 | 14 |
| Combigan | Brimonidine Tartrate/Timolol | 33 | 1,532 | $15,147.22 | — |
| Dorzolamide Hcl | Dorzolamide Hcl | 29 | 2,041 | $641.94 | 11 |
| Valacyclovir | Valacyclovir Hcl | 28 | 992 | $1,297.87 | 11 |
| Vyzulta | Latanoprostene Bunod | 24 | 1,046 | $9,819.33 | 11 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 23 | 499 | $497.14 | 15 |
| Fluorometholone | Fluorometholone | 23 | 595 | $1,666.03 | — |
| Simbrinza | Brinzolamide/Brimonidine Tart | 21 | 810 | $5,008.08 | — |
| Rhopressa | Netarsudil Mesylate | 20 | 1,003 | $12,927.26 | — |
| Atropine Sulfate | Atropine Sulfate | 17 | 540 | $326.78 | — |
| Dorzolamide-Timolol | Dorzolamide/Timolol/Pf | 17 | 510 | $1,560.70 | — |
(top 25 shown)
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
Self-certified to NPPES: 2022-03-04NUCC 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.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20130705000357
FL
9537309059
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
William J. Mallon, Md
3500 Us Hwy 1, Vero Beach, FL 329604511
Phone: 7722991404
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 - Ophthalmic Plastic and Reconstructive Surgery
Doctor of Medicine (M.D.)
Optometrist
Doctor of Optometry
Ophthalmology
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
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 3500 US HIGHWAY 1, VERO BEACH, FL 329604511 (Tel: 7722991404)
Registered at 3500 US HIGHWAY 1, VERO BEACH, FL 329604511 (Tel: 7722991404)
NPI status registered as active in NPPES database
Registered at 2201 S 10TH ST, FORT PIERCE, FL 349505382 (Tel: 3522650239)
Registered at 2201 S 10TH ST, FORT PIERCE, FL 349505382 (Tel: 3522650239)
Recorded as DEREK OHLSTEIN, M.D.
Internal Medicine (license number reported to NPPES: FL TRN13800)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Ophthalmology Specialists in Vero Beach
- Dr. Sarah Khodadadeh, MD, MS
- Dr. Adam Katz, MD
- Dr. Robert Reinauer, MD
- Edward Branigan
- Dr. David O'brien, MD
- Dr. Shaun Swindler, MD
Mailing Address
3500 Us Highway 1
Vero Beach, FL 329604511
Phone: 7722991404