Sidney Chang, MD
NPI 1790888006 · Ophthalmology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sidney Chang, MD is a Ophthalmology Physician provider in San Diego, CA (NPI 1790888006).
Provider details
- NPI number
- 1790888006
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2008017344 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
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
3,129 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 | 632 | $126 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 549 | $40 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 445 | $521 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 239 | $56 |
| Imaging of Optic Nerve92133 | 227 | $34 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 408 | 295 |
| Latanoprost | 356 | 133 |
| Moxifloxacin Hclbrand: Moxifloxacin | 240 | 166 |
| Timolol Maleate | 187 | 65 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 178 | 63 |
| Bimatoprostbrand: Lumigan | 124 | 38 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 68 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,255 across 54 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
- 2006-09-06
- Last updated
- 2013-07-16
Frequently asked questions
- What is Sidney Chang's NPI number?
- Sidney Chang's National Provider Identifier (NPI) is 1790888006, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sidney Chang's specialty?
- Sidney Chang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Sidney Chang located?
- Sidney Chang's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Sidney Chang's phone number?
- The practice phone number listed in the NPPES registry for Sidney Chang is (858) 534-6290.
- Does Sidney Chang accept Medicare?
- Sidney Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sidney Chang's NPI active?
- Yes — Sidney Chang's NPI (1790888006) is active in the NPPES registry as of the last update on 2013-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.