Masaharu Osato, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

G060449 Issued in CA

Practice address

2860 Sepulveda Blvd
Torrance, CA 90505-2803

Phone

(310) 534-8200

Fax

(310) 534-8200

NPI assigned

Jun 3, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

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

GastroenterologyAlso: Internal Medicine

Education

Loma Linda University School of Medicine, 1983

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Osato Medical Clinic IncGroup PAC ID 7012912892, 3 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Osato Medical Clinic Inc.

  • Gastroenterology Physician
  • Torrance, CA
  • NPI 1740259266
  Medicare reassignment Care Compare group NPD
• Osato Medical Clinic Inc.

  • Health Service Clinic/Center
  • Torrance, CA
  • NPI 1215250824
  NPD
• Osato Surgical Center

  • Ambulatory Surgical Clinic/Center
  • Torrance, CA
  • NPI 1104104058
  NPD
• Providence Health System Southern California

  • General Acute Care Hospital
  • Torrance, CA
  • NPI 1902844988
  NPD (past)

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

{
    "created_epoch": "1149292800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772323200000",
    "number": "1265470280",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2860 SEPULVEDA BLVD",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905052803",
            "telephone_number": "310-534-8200",
            "fax_number": "310-534-8265"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2860 SEPULVEDA BLVD",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905052803",
            "telephone_number": "310-534-8200",
            "fax_number": "310-534-8200"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OSATO",
        "first_name": "MASAHARU",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-03",
        "last_updated": "2026-03-01",
        "certification_date": "2026-03-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "G060449",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Naomi Osada, DDS
• Osato Medical Clinic Inc.
• Osato Medical Clinic Inc.
• Osato Surgical Center
• Kazumasa Osato
• Thomas Osborn
• Deborah W. Osborne
• Katrina Osborne
• Mark Evan Oseas, D.D.S.
• Yvette Osei-Akosa, MD, MPH

• Gastroenterology Physician in Torrance, CA
• Providers in Torrance, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 1, 2026; 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.