Clark Tsai, M.D.
NPI 1720096829 · Ophthalmology Physician · Concord, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clark Tsai, M.D. is a Ophthalmology Physician provider in Concord, CA (NPI 1720096829).
Provider details
- NPI number
- 1720096829
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G76192 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
12,489 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 2,437 | $155 |
| Multiple Measurements of Eye Fluid Pressure Over an Extended Time Period92100 | 1,033 | $112 |
| Photography of the Retina92250 | 894 | $43 |
| Imaging of Retina92134 | 879 | $48 |
| Exam of Visual Field With Extended Testing92083 | 840 | $73 |
| Exam of the Internal Drainage System of Eye92020 | 830 | $34 |
| Ultrasound Scan of Cornea to Determine Thickness |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 2,556 | 815 |
| Brimonidine Tartrate | 1,127 | 338 |
| Timolol Maleate | 824 | 231 |
| Moxifloxacin Hclbrand: Moxifloxacin | 468 | 219 |
| Dorzolamide Hcl | 385 | 104 |
| Prednisolone Acetate | 338 | 217 |
| Ketorolac Tromethamine | 310 | 179 |
| Azelastine Hcl | 257 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$239 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-04
- Last updated
- 2015-08-17
Frequently asked questions
- What is Clark Tsai's NPI number?
- Clark Tsai's National Provider Identifier (NPI) is 1720096829, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clark Tsai's specialty?
- Clark Tsai is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Clark Tsai located?
- Clark Tsai's practice location on file with NPPES is 2700 Grant St, Concord, CA 94520-2266.
- What is Clark Tsai's phone number?
- The practice phone number listed in the NPPES registry for Clark Tsai is (925) 689-7744.
- Does Clark Tsai accept Medicare?
- Clark Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clark Tsai's NPI active?
- Yes — Clark Tsai's NPI (1720096829) is active in the NPPES registry as of the last update on 2015-08-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.