Changyow Kwan
NPI 1588110423 · Ophthalmology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Changyow Kwan is a Ophthalmology Physician provider in Irvine, CA (NPI 1588110423).
Provider details
- NPI number
- 1588110423
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A187362 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
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 | 100 | 68 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 78 | 52 |
| Brimonidine Tartrate | 62 | 38 |
| Brinzolamide | 35 | 15 |
| Timolol Maleate | 32 | 16 |
| Prednisolone Acetate | 30 | 18 |
| Brimonidine Tartratebrand: Alphagan P | 24 | 12 |
| Latanoprostene Bunod |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$390 across 8 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 (1)
- 240 E Huron StSuite 1-200Chicago, IL 60611-2909Phone: (312) 503-7975
Registry dates
- Enumerated
- 2016-08-31
- Last updated
- 2024-07-15
- Certified
- 2024-07-15
Frequently asked questions
- What is Changyow Kwan's NPI number?
- Changyow Kwan's National Provider Identifier (NPI) is 1588110423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Changyow Kwan's specialty?
- Changyow Kwan is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Changyow Kwan located?
- Changyow Kwan's practice location on file with NPPES is 850 Health Sciences Rd, Irvine, CA 92617-3058.
- What is Changyow Kwan's phone number?
- The practice phone number listed in the NPPES registry for Changyow Kwan is (949) 824-2020.
- Does Changyow Kwan accept Medicare?
- Changyow Kwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Changyow Kwan's NPI active?
- Yes — Changyow Kwan's NPI (1588110423) is active in the NPPES registry as of the last update on 2024-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.