April Stempien-otero, MD
April Stempien-otero, MD is an Advanced Heart Failure and Transplant Cardiology Physician in Seattle, WA, registered under NPI 1326176330. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1959 NE PACIFIC ST, Seattle, WA 98195. 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 |
|---|---|---|
| MD00031926 | WA | Advanced Heart Failure and Transplant… primary |
| M-16929 | ID | Cardiovascular Disease Physician |
| MD00031926 | WA | Cardiovascular Disease Physician |
Licences are recorded in 2 states: WA, ID. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Advanced Heart Failure And Transplant Cardiology
- PAC ID
- 7517083843
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Washington | I20100923001528 | Practitioner - Advanced Heart Failure And Transplant Cardiology |
| Idaho | I20230126000531 | Practitioner - Cardiovascular Disease (cardiology) |
Medicare enrolment is recorded as approved under the provider type Practitioner - Advanced Heart Failure And Transplant Cardiology. There are 2 separate enrolment records across 2 states (WA, ID). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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.
Licensed in 2 states
This provider holds licences in 2 states: Idaho and Washington. The practice address on file is in Seattle, WA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- MD00031926
- Specialty
- Advanced Heart Failure and Transplant…
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Advanced Heart Failure and Transplant Cardiology covers
Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure. NUCC Health Care Provider Taxonomy, code 207RA0001X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RA0001X | Advanced Heart Failure and Transplant Cardiology Physician Advanced Heart Failure and Transplant Cardiology | MD00031926 | WA | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | M-16929 | ID | |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | MD00031926 | 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 | 1326176330 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 1, 2007 |
| Last updated | Jul 25, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1959 NE PACIFIC ST Seattle, WA 98195 (206) 520-5000 Fax (206) 598-4669 |
| Mailing address |
PO BOX 50095 Seattle, WA 98145 |
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 | 3 | 2 | 6 | 1 | 7 | 6 | 3 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 4 | 6 | 2 | 7 | 3 | 3 | 6 |
Sum = 60 · next multiple of 10 = 60 · 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.