Dr. Derek Stuart Welsbie , MD, PhD
Ophthalmology โข Baltimore, MD
600 N Wolfe St
Baltimore, MD 212870005
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 June 17, 2007; this date does not establish years in practice.
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Published CMS data list 619 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:
- 99214 โ Established patient outpatient office visit: 530 service units.
- 92020 โ Exam of the internal drainage system of eye: 46 service units.
- 76514 โ Ultrasound scan of cornea to determine thickness: 30 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 4 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 565 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:
- Latanoprost โ 242 prescription fills, including refills.
- Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) โ 79 prescription fills, including refills.
- Rhopressa (Netarsudil Mesylate) โ 61 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 11 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Baltimore, MD (2024, 121 clinicians with data). Median for this group: 1,626. Middle half: 619 to 3,951.
Fewer Medicare Part B services than 80% of clinicians listed under Ophthalmology in Maryland (2024, 343 clinicians with data). Median for this group: 2,186. Middle half: 951 to 4,557.
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 682 in 2020 to 619 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
600 N Wolfe St
Baltimore, MD 212870005
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 California. 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
University Of California, Geffen School Of Medicine
2006
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
298 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 $76,634 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 $52,641 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
1,161 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
$62,883 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.
Open Payments general payments, program year 2025
All general payments: $1,242.05 across 2 records.
By nature of payment
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program: $1,125.74 across 1 record.
- Food and Beverage: $116.31 across 1 record.
Reporting-company totals
- Janssen Research & Development, LLC: $1,125.74 across 1 record.
- ABBVIE INC.: $116.31 across 1 record.
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
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 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
2007
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. Welsbie 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. Welsbie 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 Baltimore and Maryland
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Baltimore, MD (2024, 121 clinicians with data). Median for this group: 1,626. Middle half: 619 to 3,951.
Fewer Medicare Part B services than 80% of clinicians listed under Ophthalmology in Maryland (2024, 343 clinicians with data). Median for this group: 2,186. Middle half: 951 to 4,557.
Medicare-allowed amount
A lower Medicare-allowed amount than 70% of clinicians listed under Ophthalmology in Baltimore, MD (2024, 121 clinicians with data). Median for this group: $211,954. Middle half: $65,343 to $447,737.
A lower Medicare-allowed amount than 75% of clinicians listed under Ophthalmology in Maryland (2024, 343 clinicians with data). Median for this group: $276,741. Middle half: $107,212 to $539,563.
Paid by Medicare
A lower Medicare payment amount than 70% of clinicians listed under Ophthalmology in Baltimore, MD (2024, 121 clinicians with data). Median for this group: $151,772. Middle half: $44,902 to $329,515.
A lower Medicare payment amount than 75% of clinicians listed under Ophthalmology in Maryland (2024, 343 clinicians with data). Median for this group: $202,509. Middle half: $72,448 to $395,090.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Ophthalmology in Baltimore, MD (2024, 126 clinicians with data). Median for this group: 450. Middle half: 133 to 1,058.
Close to the middle for clinicians listed under Ophthalmology in Maryland (2024, 360 clinicians with data). Median for this group: 596. Middle half: 210 to 1,407.
Part D drug cost
A higher Part D drug cost than 60% of clinicians listed under Ophthalmology in Baltimore, MD (2024, 126 clinicians with data). Median for this group: $27,303. Middle half: $4,570 to $118,859.
Close to the middle for clinicians listed under Ophthalmology in Maryland (2024, 360 clinicians with data). Median for this group: $61,439. Middle half: $8,807 to $187,238.
210 active clinicians are listed under Ophthalmology with a practice address in Baltimore, MD (588 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Baltimore
0.5% of these 210 clinicians have the CMS telehealth indicator.
31.9% of these 210 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 varied from year to year: 682 in 2020 and 619 in 2024.
- 2020: 682
- 2021: 781
- 2022: 529
- 2023: 595
- 2024: 619
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Medicare-allowed amount
Medicare-allowed amount increased 15% from $66,554 in 2020 to $76,634 in 2024.
- 2020: $66,554
- 2021: $85,704
- 2022: $67,564
- 2023: $75,368
- 2024: $76,634
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Paid by Medicare
Paid by Medicare increased 20% from $43,903 in 2020 to $52,641 in 2024.
- 2020: $43,903
- 2021: $59,188
- 2022: $46,011
- 2023: $50,084
- 2024: $52,641
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 66% from 1,666 in 2020 to 565 in 2024.
- 2020: 1,666
- 2021: 1,428
- 2022: 804
- 2023: 656
- 2024: 565
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30-day fills
30-day fills decreased 63% from 3,125 in 2020 to 1,161 in 2024.
- 2020: 3,125
- 2021: 2,749
- 2022: 1,572
- 2023: 1,370
- 2024: 1,161
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Part D drug cost
Part D drug cost decreased 77% from $271,050 in 2020 to $62,883 in 2024.
- 2020: $271,050
- 2021: $234,923
- 2022: $158,463
- 2023: $91,949
- 2024: $62,883
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $337.25 in 2022 to $1,242.05 in 2025.
- 2022: $337.25
- 2023: $238.72
- 2024: $142.33
- 2025: $1,242.05
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 ยท 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 โ December 31, 2025): fewer than 11 records totaling $1,242.05.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Research & Development, LLC |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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โ | General | $1,125.74 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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XEN GLAUCOMA TREATMENT SYSTEM | General | $116.31 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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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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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530 | 291 | $403.01 | $136.99 |
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92020
Exam of the internal drainage system of eye
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46 | 46 | $96.39 | $29.75 |
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76514
Ultrasound scan of cornea to determine thickness
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30 | 30 | $113.47 | $12.09 |
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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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13 | 13 | $594.77 | $176.76 |
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 | 242 | 15,302 | $3,782.24 | 91 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 79 | 6,249 | $2,312.06 | 30 |
| Rhopressa | Netarsudil Mesylate | 61 | 2,120 | $25,726.19 | 24 |
| Timolol Maleate | Timolol Maleate | 35 | 2,472 | $714.33 | 15 |
| Prednisolone Acetate | Prednisolone Acetate | 33 | 1,424 | $1,311.15 | 17 |
| Brimonidine Tartrate | Brimonidine Tartrate | 28 | 1,333 | $5,698.75 | โ |
| Simbrinza | Brinzolamide/Brimonidine Tart | 22 | 1,324 | $7,634.27 | โ |
| Dorzolamide Hcl | Dorzolamide Hcl | 21 | 1,427 | $749.68 | โ |
| Dorzolamide-Timolol | Dorzolamide/Timolol/Pf | 19 | 630 | $1,865.22 | โ |
| Alphagan P | Brimonidine Tartrate | 13 | 550 | $4,668.63 | โ |
| Lumigan | Bimatoprost | 12 | 921 | $8,420.46 | 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.
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
I20160831000738
CA
7214110527
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 California
9415 Campus Point Dr, La Jolla, CA 920931350
Phone: 8582496753
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Radiology - Radiation Oncology
Doctor of Medicine (M.D.)
Internal Medicine - Advanced Heart Failure and Transplant Cardiology
Doctor of Medicine (M.D.)
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated June 17, 2007.
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 Baltimore
- Dr. Ishrat Ahmed, MD
- Dr. Basil Morgan, MD
- Dr. Uri Soiberman, MD
- Dr. Bryn Burkholder, MD
- Dr. Marc Hirschbein, MD
- Dr. John Baer, MD
Mailing Address
Po Box 64481
Baltimore, MD 212644481
Phone: 4106141342