Sylvia Chang
NPI 1053843458 · Ophthalmology Physician · Rancho Cucamonga, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sylvia Chang is a Ophthalmology Physician provider in Rancho Cucamonga, CA (NPI 1053843458).
Provider details
- NPI number
- 1053843458
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 21409 (NV)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
79 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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 37 | $135 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $95 |
| Imaging of Optic Nerve92133 | 12 | $39 |
Typical Medicare-allowed amounts for these services range $39–$135 (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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 813 | 304 |
| Prednisolone Acetate | 745 | 510 |
| Ketorolac Tromethamine | 613 | 435 |
| Moxifloxacin Hclbrand: Moxifloxacin | 331 | 235 |
| Timolol Maleate | 311 | 116 |
| Brimonidine Tartrate | 302 | 106 |
| Ofloxacin | 243 | 221 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$844 across 21 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 (2)
- 150 S Grand Ave Ste JGlendora, CA 91741-4716Phone: (626) 335-2114Fax: (626) 963-6497
- 207 S Santa Anita St Ste P25San Gabriel, CA 91776-1145Phone: (626) 200-1277Fax: (626) 200-1278
Registry dates
- Enumerated
- 2017-04-03
- Last updated
- 2024-06-13
- Certified
- 2024-06-13
Frequently asked questions
- What is Sylvia Chang's NPI number?
- Sylvia Chang's National Provider Identifier (NPI) is 1053843458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sylvia Chang's specialty?
- Sylvia Chang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Sylvia Chang located?
- Sylvia Chang's practice location on file with NPPES is 9170 Haven Ave Ste 102, Rancho Cucamonga, CA 91730-5416.
- What is Sylvia Chang's phone number?
- The practice phone number listed in the NPPES registry for Sylvia Chang is (909) 440-1014.
- Does Sylvia Chang accept Medicare?
- Sylvia Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sylvia Chang's NPI active?
- Yes — Sylvia Chang's NPI (1053843458) is active in the NPPES registry as of the last update on 2024-06-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.