Rex Liu, MD
Rex Liu, MD is a Cardiovascular Disease Physician in Mount Vernon, WA, registered under NPI 1427082593. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 307 S 13TH ST STE 300, Mount Vernon, WA 98274. 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 |
|---|---|---|
| MD60680840 | WA | Cardiovascular Disease Physician primary |
| MD60680840 | WA | Advanced Heart Failure and Transplant… |
| MD60680840 | WA | Interventional Cardiology Physician |
| MD60680840 | WA | Internal Medicine Physician |
This provider holds licence MD60680840 issued in WA. 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 - Advanced Heart Failure And Transplant Cardiology
- PAC ID
- 2668483553
- Enrollment ID
- I20170215001265
Medicare enrolment is recorded as approved under the provider type Practitioner - Advanced Heart Failure And Transplant 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
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | MD60680840 | WA | primary |
| 207RA0001X | Advanced Heart Failure and Transplant Cardiology Physician Advanced Heart Failure and Transplant Cardiology | MD60680840 | WA | |
| 207RI0011X | Interventional Cardiology Physician Interventional Cardiology | MD60680840 | WA | |
| 207R00000X | Internal Medicine Physician | MD60680840 | WA |
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 | 1427082593 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 11, 2006 |
| Last updated | Mar 14, 2024 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
307 S 13TH ST STE 300 Mount Vernon, WA 98274 (360) 336-9757 Fax (360) 814-5237 |
| Mailing address |
1400 E KINCAID ST Mount Vernon, WA 98274 |
| Other identifiers |
2074108
· Medicaid (WA) |
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 | 4 | 2 | 7 | 0 | 8 | 2 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 4 | 7 | 0 | 8 | 4 | 5 | 9 |
Sum = 67 · next multiple of 10 = 70 · check digit = 3 · actual last digit = 3
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.