Quick answers
- Which hospitals does Michael G. Griesinger work at?
- Medicare's official clinician data lists Michael G. Griesinger at 4 hospitals: Grossmont Hospital, Kaiser Foundation Hospital - San Diego, Palomar Health Downtown Campus and Palomar Medical Center Poway. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael G. Griesinger see patients?
- Medicare's clinician data lists 4 practice locations, including Poway, CA, Long Beach, CA and Escondido, CA. Call before your visit to confirm the address.
- What is Michael G. Griesinger's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Michael G. Griesinger accept Medicare assignment?
- Yes. Medicare's clinician data says Michael G. Griesinger 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.
- What is the phone number for Michael G. Griesinger?
- (310) 379-2134, as listed in official Medicare / NPI Registry data.
- What is Michael G. Griesinger's NPI number?
- 1336556604. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael G. Griesinger works
Medicare's Facility Affiliation Data lists Michael G. Griesinger at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Grossmont HospitalLa Mesa, CA · Acute Care Hospital · CCN 050026
- Kaiser Foundation Hospital - San DiegoSan Diego, CA · Acute Care Hospital · CCN 050515
- Palomar Health Downtown CampusEscondido, CA · Acute Care Hospital · CCN 050115
- Palomar Medical Center PowayPoway, CA · Acute Care Hospital · CCN 050636
Practice locations
Addresses where Michael G. Griesinger is enrolled with Medicare (CMS data updated 2026-10-02).
- 15615 Pomerado RdPoway, CA 92064 (310) 379‑2134
- 1703 Termino Ave, Suite 106Long Beach, CA 90804 (562) 800‑3321
- 2185 Citracado PkwyEscondido, CA 92029 (310) 379‑2134
- 5555 Grossmont Ctr DrLa Mesa, CA 91942 (619) 465‑0711
Group practices
Medicare enrollment lists Michael G. Griesinger as a member of these groups (CMS data updated 2026-10-02).
- Team Physicians of Northern California Medical Group Inc85 clinicians in the group
- Palomar Emergency Physicians, Inc71 clinicians in the group
- Wound Docs Apc21 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Poway
Clinicians with the same Medicare primary specialty in Poway, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336556604 |
| 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