Quick answers
- Which hospitals does Matthew Janssen work at?
- Medicare's official clinician data lists Matthew Janssen at 2 hospitals: Memorialcare Orange Coast Medical Center and Memorialcare Saddleback Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew Janssen see patients?
- Medicare's clinician data lists 3 practice locations, including Fountain Valley, CA and Laguna Hills, CA. Call before your visit to confirm the address.
- What is Matthew Janssen's specialty?
- Medicare lists Hospice/Palliative Care as the primary specialty, and also Emergency Medicine.
- Does Matthew Janssen accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew Janssen 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 Matthew Janssen offer telehealth?
- Medicare's clinician data says Matthew Janssen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Matthew Janssen?
- (657) 241-9090, as listed in official Medicare / NPI Registry data.
- What is Matthew Janssen's NPI number?
- 1497857023. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew Janssen works
Medicare's Facility Affiliation Data lists Matthew Janssen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorialcare Orange Coast Medical CenterFountain Valley, CA · Acute Care Hospital · CCN 050678
- Memorialcare Saddleback Medical CenterLaguna Hills, CA · Acute Care Hospital · CCN 050603
Practice locations
Addresses where Matthew Janssen is enrolled with Medicare (CMS data updated 2026-10-02).
- 18035 Brookhurst St, Suite 2100Fountain Valley, CA 92708 (657) 241‑9090
- 24451 Health Ctr DrLaguna Hills, CA 92653 (949) 837‑4500
- 9920 Talbert AveFountain Valley, CA 92708 (714) 378‑7000
Group practices
Medicare enrollment lists Matthew Janssen as a member of these groups (CMS data updated 2026-10-02).
- Memorialcare Medical Foundation566 clinicians in the group
- California Emergency Physicians Medical Group a Professional Corp19 clinicians in the group
Specialties
- Hospice/Palliative Careprimary
- Emergency Medicinealso
Other palliative care doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497857023 |
| 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