Andrew Chang, M.D.
NPI 1003808494 · Ophthalmology Physician · Northridge, CA
Enrolled with Medicare as Dme Supplier - Physician - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Chang, M.D. is a Ophthalmology Physician provider in Northridge, CA (NPI 1003808494).
Provider details
- NPI number
- 1003808494
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G61183 (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
20 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
1,503 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 | 567 | $124 |
| New Patient Complete Exam of Visual System92004 | 200 | $148 |
| Photography of the Retina92250 | 176 | $38 |
| Imaging of Retina92134 | 174 | $42 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 166 | $47 |
| Established Patient Problem Focused Exam of Visual System92012 | 78 | $91 |
| Removal of Cataract With Insertion of Prosthetic Lens |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 914 | 209 |
| Prednisolone Acetate | 374 | 235 |
| Timolol Maleate | 360 | 81 |
| Ofloxacin | 267 | 205 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 231 | 80 |
| Ketorolac Tromethamine | 176 | 134 |
| Brimonidine Tartrate | 111 | 27 |
| Tobramycin/Dexamethasone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$484 across 10 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
- 2005-08-22
- Last updated
- 2008-04-25
Frequently asked questions
- What is Andrew Chang's NPI number?
- Andrew Chang's National Provider Identifier (NPI) is 1003808494, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Chang's specialty?
- Andrew Chang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Chang located?
- Andrew Chang's practice location on file with NPPES is 18350 Roscoe Blvd, Northridge, CA 91325-4109.
- What is Andrew Chang's phone number?
- The practice phone number listed in the NPPES registry for Andrew Chang is (818) 349-8300.
- Does Andrew Chang accept Medicare?
- Andrew Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Chang's NPI active?
- Yes — Andrew Chang's NPI (1003808494) is active in the NPPES registry as of the last update on 2008-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.