Kay-won Chang
Kay-won Chang is a Cardiovascular Disease Physician in Dublin, CA, registered under NPI 1205213410.
Getting there
The practice address on file is 4000 DUBLIN BLVD 3RD FLOOR, Dublin, CA 94568. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A144085 | CA | Cardiovascular Disease Physician primary |
This provider holds licence A144085 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Cardiovascular Disease (cardiology)
- PAC ID
- 7618309717
- Enrollment ID
- I20191111002470
Medicare enrolment is recorded as approved under the provider type Practitioner - Cardiovascular Disease (cardiology). Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Cardiovascular Disease covers
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms. NUCC Health Care Provider Taxonomy, code 207RC0000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1205213410 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 27, 2015 |
| Last updated | Aug 25, 2021 |
| Status | Active |
| Sole proprietor | No |
| Practice address |
4000 DUBLIN BLVD 3RD FLOOR Dublin, CA 94568 (510) 498-2178 |
| Mailing address |
3200 KEARNEY STREET BUILDING 2, 1ST FLOOR Fremont, CA 94538 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 2 | 0 | 5 | 2 | 1 | 3 | 4 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 0 | 5 | 4 | 1 | 6 | 4 | 2 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.