Quick answers
- Which hospitals does Erwin Grussie work at?
- Medicare's official clinician data lists Erwin Grussie at 4 hospitals: Cedar-Sinai Marina del Rey Hospital, Cedars-Sinai Medical Center, Providence Saint Joseph Medical Ctr and Saint John's Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Erwin Grussie see patients?
- Medicare's clinician data lists 2 practice locations, including Los Angeles, CA and Santa Monica, CA. Call before your visit to confirm the address.
- What is Erwin Grussie's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Medical Oncology.
- Does Erwin Grussie accept Medicare assignment?
- Yes. Medicare's clinician data says Erwin Grussie 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 Erwin Grussie offer telehealth?
- Medicare's clinician data says Erwin Grussie offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Erwin Grussie?
- (310) 231-2121, as listed in official Medicare / NPI Registry data.
- What is Erwin Grussie's NPI number?
- 1679917561. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Erwin Grussie works
Medicare's Facility Affiliation Data lists Erwin Grussie at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cedar-Sinai Marina del Rey HospitalMarina del Rey, CA · Acute Care Hospital · CCN 050740
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050625
- Providence Saint Joseph Medical CtrBurbank, CA · Acute Care Hospital · CCN 050235
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · CCN 050290
Practice locations
Addresses where Erwin Grussie is enrolled with Medicare (CMS data updated 2026-10-02).
- 11800 Wilshire BlvdLos Angeles, CA 90025 (310) 231‑2121
- 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 582‑7450
Group practices
Medicare enrollment lists Erwin Grussie as a member of these groups (CMS data updated 2026-10-02).
- Cedars-Sinai Medical Care Foundation1,692 clinicians in the group
- Providence Medical Institute288 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Medical Oncologyalso
Other hematologist-oncologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1679917561 |
| 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