Quick answers
- Which hospitals does John L. Petersen Ii work at?
- Medicare's official clinician data lists John L. Petersen Ii at 5 hospitals: Olympic Medical Center, Swedish Edmonds Hospital, Swedish Issaquah, Swedish Medical Center and Swedish Medical Center / Cherry Hill. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John L. Petersen Ii see patients?
- Medicare's clinician data lists 1 practice location in Seattle, WA. Call before your visit to confirm the address.
- What is John L. Petersen Ii's specialty?
- Medicare lists Interventional Cardiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does John L. Petersen Ii accept Medicare assignment?
- Yes. Medicare's clinician data says John L. Petersen Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does John L. Petersen Ii offer telehealth?
- Medicare's clinician data says John L. Petersen Ii offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John L. Petersen Ii?
- (206) 861-8550, as listed in official Medicare / NPI Registry data.
- What is John L. Petersen Ii's NPI number?
- 1629026893. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John L. Petersen Ii works
Medicare's Facility Affiliation Data lists John L. Petersen Ii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Olympic Medical CenterPort Angeles, WA · Acute Care Hospital · CCN 500072
- Swedish Edmonds HospitalEdmonds, WA · Acute Care Hospital · CCN 500026
- Swedish IssaquahIssaquah, WA · Acute Care Hospital · CCN 500152
- Swedish Medical CenterSeattle, WA · Acute Care Hospital · CCN 500027
- Swedish Medical Center / Cherry HillSeattle, WA · Acute Care Hospital · CCN 500025
Practice locations
Addresses where John L. Petersen Ii is enrolled with Medicare (CMS data updated 2026-10-02).
- 550 17th Ave, Fl 6Seattle, WA 98122 (206) 861‑8550
Group practices
Medicare enrollment lists John L. Petersen Ii as a member of this group (CMS data updated 2026-10-02).
- Swedish Health Services79 clinicians in the group
Specialties
Find other Interventional Cardiology doctors in Washington →
Other interventional cardiologists in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1629026893 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians