Sean Tsao, M.D.
NPI 1841550217 · Ophthalmology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Tsao, M.D. is a Ophthalmology Physician provider in Irvine, CA (NPI 1841550217).
Provider details
- NPI number
- 1841550217
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
14 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $109 |
Typical Medicare-allowed amounts for these services range $109–$109 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 239 | 80 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 137 | 68 |
| Timolol Maleate | 127 | 50 |
| Prednisolone Acetate | 116 | 61 |
| Cyclosporine | 110 | 35 |
| Brimonidine Tartrate | 89 | 44 |
| Fluorometholone | 34 | 11 |
| Ketorolac Tromethamine | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-20
- Last updated
- 2021-12-03
Frequently asked questions
- What is Sean Tsao's NPI number?
- Sean Tsao's National Provider Identifier (NPI) is 1841550217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Tsao's specialty?
- Sean Tsao is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Tsao located?
- Sean Tsao's practice location on file with NPPES is 850 Health Sciences Rd, Irvine, CA 92617-3058.
- What is Sean Tsao's phone number?
- The practice phone number listed in the NPPES registry for Sean Tsao is (949) 824-2020.
- Does Sean Tsao accept Medicare?
- Sean Tsao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Tsao's NPI active?
- Yes — Sean Tsao's NPI (1841550217) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.