Erwin Grussie

Primary specialty

Hematology (Internal Medicine) PhysicianTaxonomy code 207RH0000X

License

A138355 Issued in CA

Practice address

11800 Wilshire Blvd # 2F
Los Angeles, CA 90025-6602

Phone

(310) 231-2121

NPI assigned

Apr 22, 2013

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hematology/OncologyAlso: Medical Oncology

Education

Other, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Cedars-Sinai Medical Care FoundationGroup PAC ID 0941106645, 1,684 clinicians

Providence Medical InstituteGroup PAC ID 5991609737, 303 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Pacific Rim Home Health, Inc Home health agency, Alhambra, CA, CCN 059300
• Cedars-Sinai Medical Center Hospital, Los Angeles, CA, CCN 050625
• Providence Saint Joseph Medical Ctr Hospital, Burbank, CA, CCN 050235
• Cedar-Sinai Marina del Rey Hospital Hospital, Marina del Rey, CA, CCN 050740
• Saint John'S Health Center Hospital, Santa Monica, CA, CCN 050290

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: egrussie527752@direct.cshs.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Cedars-Sinai Medical Care Foundation

  • Specialist
  • Los Angeles, CA
  • NPI 1316984388
  Medicare reassignment Care Compare group NPD
• Providence Medical Institute

  • Family Medicine Physician
  • Torrance, CA
  • NPI 1417915760
  Medicare reassignment Care Compare group NPD
• Cedars-Sinai Medical Care Foundation

  • Anesthesiology Physician
  • Los Angeles, CA
  • NPI 1043826720
  NPD
• Providence Medical Institute

  • Family Medicine Physician
  • Torrance, CA
  • NPI 1235182569
  NPD
• Providence Medical Institute

  • Family Medicine Physician
  • Torrance, CA
  • NPI 1760425862
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Cedars-Sinai Marina Hospital

  • General Acute Care Hospital
  • Marina del Rey, CA
  • NPI 1942269725
  Care Compare affiliation
• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1639172372
  Care Compare affiliation
• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • West Hollywood, CA
  • NPI 1891940326
  Care Compare affiliation
• Pacific Rim Home Health, Inc.

  • Home Health Agency
  • Alhambra, CA
  • NPI 1396865234
  Care Compare affiliation
• Providence Health System - Southern California

  • General Acute Care Hospital
  • Burbank, CA
  • NPI 1336173269
  Care Compare affiliation
• Providence Saint John'S Health Center

  • General Acute Care Hospital
  • Santa Monica, CA
  • NPI 1124026273
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1366588800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1760313600000",
    "number": "1679917561",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "181 S BUENA VISTA ST",
            "city": "BURBANK",
            "state": "CA",
            "postal_code": "915054504",
            "telephone_number": "818-748-4900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11800 WILSHIRE BLVD # 2F",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900256602",
            "telephone_number": "310-231-2121"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "181 S Buena Vista St",
            "address_purpose": "LOCATION",
            "city": "Burbank",
            "state": "CA",
            "postal_code": "915054504",
            "country_code": "US",
            "telephone_number": "818-748-4900",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GRUSSIE",
        "first_name": "ERWIN",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-04-22",
        "last_updated": "2025-10-13",
        "certification_date": "2025-10-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "A138355",
            "primary": false
        },
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "CA",
            "license": "A138355",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ulla Grunnet, PSY.D.
• Grupo Medico Familiar Santa Fe Inc
• Carl Mayer Grushkin, M.D.
• Bethany Alexis Gruskin
• Oscar Grussi
• Charles Gruver, MD
• Daniel Gruzman, D.O.
• Christopher Kazimieras Grybauskas, MD
• Katarzyna Grzegorczyk, L.AC.
• Melanie Tracy Grzyb, LMFT, M.S.

• Hematology (Internal Medicine) Physician in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• Hematology (Internal Medicine) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 13, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.