Winnie Tseng, OD
NPI 1629140108 · Optometrist · Littleton, NH
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Winnie Tseng, OD is a Optometrist provider in Littleton, NH (NPI 1629140108).
Provider details
- NPI number
- 1629140108
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- 0720 (NH)
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
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
1,454 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 | 318 | $119 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 273 | $85 |
| Exam of Visual Field With Extended Testing92083 | 204 | $60 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 176 | $119 |
| Photography of the Retina92250 | 123 | $34 |
| Imaging of Optic Nerve92133 | 122 | $32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 197 | 58 |
| Timolol Maleate | 49 | 17 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 36 | — |
| Dorzolamide Hcl | 33 | — |
| Brimonidine Tartrate | 30 | 15 |
| Erythromycin Basebrand: Erythromycin | 21 | 19 |
| Latanoprostene Bunodbrand: Vyzulta | 20 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$352 across 5 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
- 2006-11-14
- Last updated
- 2014-06-16
Frequently asked questions
- What is Winnie Tseng's NPI number?
- Winnie Tseng's National Provider Identifier (NPI) is 1629140108, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Winnie Tseng's specialty?
- Winnie Tseng is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Winnie Tseng located?
- Winnie Tseng's practice location on file with NPPES is 104 Meadow St, Littleton, NH 03561-4026.
- What is Winnie Tseng's phone number?
- The practice phone number listed in the NPPES registry for Winnie Tseng is (603) 444-2592.
- Does Winnie Tseng accept Medicare?
- Winnie Tseng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Winnie Tseng's NPI active?
- Yes — Winnie Tseng's NPI (1629140108) is active in the NPPES registry as of the last update on 2014-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.