Chia-Wen Chang, M.D.
NPI 1417210451 · Ophthalmology Physician · Visalia, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chia-Wen Chang, M.D. is a Ophthalmology Physician provider in Visalia, CA (NPI 1417210451).
Provider details
- NPI number
- 1417210451
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A142555 (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
13 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
2,337 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) |
|---|---|---|
| Measurement of Corneal Curvature and Depth of Eye92136 | 437 | $26 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 312 | $130 |
| Established Patient Complete Exam of Visual System92014 | 282 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 267 | $92 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 254 | $541 |
| Imaging of Retina92134 | 220 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 511 | 109 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 248 | 64 |
| Prednisolone Acetate | 174 | 117 |
| Timolol Maleate | 146 | 37 |
| Erythromycin Basebrand: Erythromycin | 96 | 62 |
| Bimatoprostbrand: Lumigan | 87 | 20 |
| Cyclosporinebrand: Restasis | 66 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$522 across 11 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
- 2012-06-22
- Last updated
- 2016-07-18
Frequently asked questions
- What is Chia-Wen Chang's NPI number?
- Chia-Wen Chang's National Provider Identifier (NPI) is 1417210451, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chia-Wen Chang's specialty?
- Chia-Wen Chang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Chia-Wen Chang located?
- Chia-Wen Chang's practice location on file with NPPES is 5021 W Noble Ave, Visalia, CA 93277-8310.
- What is Chia-Wen Chang's phone number?
- The practice phone number listed in the NPPES registry for Chia-Wen Chang is (559) 627-9393.
- Does Chia-Wen Chang accept Medicare?
- Chia-Wen Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chia-Wen Chang's NPI active?
- Yes — Chia-Wen Chang's NPI (1417210451) is active in the NPPES registry as of the last update on 2016-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.