Nancy Tsui, OD
NPI 1841785037 · Optometrist · Anaheim, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Tsui, OD is a Optometrist provider in Anaheim, CA (NPI 1841785037).
Provider details
- NPI number
- 1841785037
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- OPT33944-TLG (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
68 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 | 45 | $138 |
| Established Patient Problem Focused Exam of Visual System92012 | 23 | $99 |
Typical Medicare-allowed amounts for these services range $99–$138 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 563 | 174 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 147 | 51 |
| Prednisolone Acetate | 105 | 77 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 67 | 43 |
| Brimonidine Tartrate | 65 | 24 |
| Timolol Maleate | 65 | 22 |
| Cyclosporine | 51 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$94 across 3 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
Additional practice locations (1)
- 1640 Newport Blvd Ste 220Costa Mesa, CA 92627-3786Phone: (949) 873-5352Fax: (949) 573-5394
Registry dates
- Enumerated
- 2018-06-29
- Last updated
- 2022-01-25
- Certified
- 2022-01-25
Frequently asked questions
- What is Nancy Tsui's NPI number?
- Nancy Tsui's National Provider Identifier (NPI) is 1841785037, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Tsui's specialty?
- Nancy Tsui is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Nancy Tsui located?
- Nancy Tsui's practice location on file with NPPES is 500 S Anaheim Hills Rd Ste 234, Anaheim, CA 92807-4760.
- What is Nancy Tsui's phone number?
- The practice phone number listed in the NPPES registry for Nancy Tsui is (714) 921-0232.
- Does Nancy Tsui accept Medicare?
- Nancy Tsui is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Tsui's NPI active?
- Yes — Nancy Tsui's NPI (1841785037) is active in the NPPES registry as of the last update on 2022-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.