Medicare Enrolled
Dr. Clark Tsai, M.D.
Ophthalmology · Concord, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Tsai from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Tsai
Dr. Clark Tsai is an ophthalmology specialist in Concord, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Tsai performed 13,067 Medicare services across 8,952 unique beneficiaries.
Between the years covered by Open Payments, Dr. Tsai received a total of $4,919 from 21 pharmaceutical and/or device companies across 59 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in ophthalmology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Tsai is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 8% volume in CA
$4,919 industry payments
Medicare Practice Summary
Medicare Utilization ↗13,067
Medicare services
Top 8% in CA for ophthalmology
8,952
Unique beneficiaries
$68
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~688 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Comprehensive eye exam, established patient A comprehensive examination of the visual system performed for a patient who has previously been seen by the provider. |
2,566 | $110 | $171 |
| Multiple eye pressure measurements over time This procedure involves taking several measurements of the fluid pressure inside the eye across an extended period. It is used to monitor intraocular pressure levels. |
1,407 | $86 | $165 |
| Eye drainage system examination An examination of the internal drainage system of the eye to assess how fluid flows and drains from the eye. |
1,363 | $27 | $99 |
| Ultrasound scan of cornea to determine thickness An ultrasound procedure used to measure the thickness of the cornea. |
1,291 | $10 | $95 |
| Retinal photography (fundus photo) This procedure involves taking photographs of the retina, the light-sensitive tissue at the back of the eye. It is used to document the condition of the eye's interior structures. |
975 | $32 | $165 |
| Visual field test, extended A test that maps your complete field of vision to detect blind spots or peripheral vision loss. Extended testing provides a more detailed assessment than a standard visual field exam. |
931 | $60 | $155 |
| Retinal imaging (OCT scan) This procedure involves imaging the retina to visualize its structure. It is used to examine the back of the eye. |
628 | $36 | $90 |
| Optic nerve imaging (OCT scan) Imaging of the optic nerve. |
602 | $35 | $90 |
| Dark adaptation test This test evaluates how well your eyes adjust to changes in light and dark conditions. It includes an interpretation of the results and a formal report. |
482 | $41 | $300 |
| Tear duct plug insertion A procedure to insert a small plug into the tear duct opening to help retain tears on the eye surface. |
466 | $81 | $249 |
| Ultrasound of eye using water bath method An ultrasound imaging test of the eye that uses a water bath technique to visualize internal eye structures. |
442 | $78 | $150 |
| Eye exam, established patient, focused A limited examination of the visual system for an existing patient. The provider focuses on a specific eye-related concern or symptom. |
335 | $88 | $140 |
| Visual field test, intermediate A test that measures your side vision to check for blind spots or other vision changes. |
238 | $38 | $125 |
| Corneal topography and eye depth measurement This procedure measures the curvature and depth of the cornea, the clear front surface of the eye. |
164 | $40 | $116 |
| Tear duct repair by heat, tying, or laser A procedure to repair a tear duct opening using heat, tying, or laser surgery. |
156 | $126 | $300 |
| Comprehensive eye exam, new patient A comprehensive examination of the visual system performed for a new patient. |
137 | $108 | $200 |
| Bevacizumab injection, 10 mg Administration of a 10 mg dose of bevacizumab medication via injection. |
121 | $57 | $297 |
| Ultrasound scan to determine eye length and lens power An ultrasound procedure used to measure the length of the eye and calculate the power of the lens. |
117 | $54 | $111 |
| Eye injection for retinal disease A procedure involving the administration of medication directly into the eye. |
116 | $108 | $593 |
| Slit lamp examination of the eye This procedure uses a specialized microscope to examine the front portion of the eye. |
116 | $28 | $250 |
| Complex cataract removal with lens and drainage device insertion This procedure involves the complex removal of a cataract from the eye, followed by the insertion of an artificial lens and a drainage device into the front chamber of the eye. |
55 | $817 | $2,000 |
| Cataract surgery with lens implant Surgical removal of the clouded natural lens of the eye and replacement with an artificial prosthetic lens to restore vision. |
53 | $297 | $1,489 |
| Emergency department visit, moderate complexity An emergency department visit for an established or new patient involving a moderate level of medical decision making. |
45 | $101 | $250 |
| CT scan of cornea A computed tomography scan used to create detailed images of the cornea, the clear front part of the eye. |
42 | $33 | $150 |
| Eyelash removal with forceps This procedure involves the manual removal of eyelashes using forceps. It is a mechanical extraction method performed on the eyelid area. |
38 | $17 | $148 |
| Laser eye fluid drainage tract creation A laser procedure used to create drainage tracts in the iris to help fluid flow out of the eye. |
35 | $299 | $700 |
| Complex cataract removal with lens implant A surgical procedure to remove a cataract from the eye and insert an artificial lens to restore vision. |
30 | $466 | $2,517 |
| Ultrasound of eye tissue and structures A diagnostic imaging test that uses sound waves to create pictures of the eye's internal tissues and structures. |
27 | $46 | $150 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
20 | $122 | $248 |
| Visual evoked potential test A test that measures how quickly electrical signals travel from the eye to the brain in response to visual stimuli. |
18 | $64 | $200 |
| Corneal foreign body removal using slit lamp A procedure to remove a foreign object from the surface of the eye's cornea. The removal is performed using a slit lamp microscope to visualize and extract the object. |
14 | $50 | $193 |
| Retinal angiography with dye injection This procedure uses a special camera to examine the blood vessels in the retina after a dye has been injected into the body. |
14 | $137 | $300 |
| Dilation of eye fluid drainage A procedure to widen the drainage pathways in the eye to help fluid flow out more easily. |
12 | $534 | $2,000 |
| Retinal and optic nerve function test A diagnostic test that measures how well the retina and optic nerve are functioning. |
11 | $123 | $200 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
0.4% high complexity
26.0% medium
73.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,919
Total received (2018-2024)
Avg $703/year across 7 years
Top 25% in CA for ophthalmology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
21
Companies
59
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$4,163 (84.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$756 (15.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$239
2023
$435
2022
$167
2021
$21
2020
$182
2019
$1,113
2018
$2,762
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Alcon Vision LLC
$143
Amgen Inc.
$36
Mallinckrodt Hospital Products Inc.
$26
Bausch & Lomb Americas Inc.
$19
Sight Sciences, Inc.
$16
Top 3 companies account for 85.4% of 2024 payments
All-time payments by company (2018-2024) ›
MacuLogix, Inc.
$1,696
Iridex Corporation
$606
Allergan Inc.
$497
Alcon Vision LLC
$416
Johnson & Johnson Surgical Vision, Inc.
$227
Allergan, Inc.
$162
Shire North American Group Inc
$150
Kala Pharmaceuticals, Inc.
$146
AbbVie Inc.
$124
Abbott Laboratories
$119
Novartis Pharmaceuticals Corporation
$114
Bausch & Lomb, a division of Bausch Health US, LLC
$113
Carl Zeiss Meditec, Inc.
$110
OPTOVUE, INC.
$106
Aerie Pharmaceuticals, Inc.
$105
Bausch & Lomb Americas Inc.
$77
Mallinckrodt Hospital Products Inc.
$44
Sight Sciences, Inc.
$37
Amgen Inc.
$36
Carl Zeiss Meditec AG
$19
OPTOS, INC.
$15
Top 3 companies account for 56.9% of all-time payments
Associated products mentioned in payments ›
ACTHAR · ALPHAGAN P · AdaptDx · CATALYS SYSTEM · COMBIGAN · DURYSTA · FF450plus · INVELTYS · LUMIGAN · MIEBO · None Specified · OMNI · OMNI SURGICAL SYSTEM · P200DTx · RESTASIS · Rhopressa · Rocklatan · SCS IPGs · Simbrinza · TEPEZZA · TRAVATAN Z · Tecnis Multifocal Family of 1-piece IOLS · Tecnis Symfony IOL · VYZULTA · XIIDRA · XR
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (85%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Ophthalmologists within 10 mi
212
Per 100K population
18.3
County median income
$125,727
Nearest hospital
JOHN MUIR MEDICAL CENTER - CONCORD CAMPUS
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Tsai is a mixed practice specialist, with above-average Medicare volume (top 8% in CA), with low-engagement industry engagement, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Tsai experienced with comprehensive eye exam, established patient?
Based on Medicare claims data, Dr. Tsai performed 2,566 comprehensive eye exam, established patient services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Tsai receive payments from pharmaceutical companies?
Yes. Dr. Tsai received a total of $4,919 from 21 companies across 59 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Tsai's costs compare to other ophthalmologists in Concord?
Dr. Tsai's average Medicare payment per service is $68. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Tsai) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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