Oak Tree Orthopedics Inc

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

Legal business name

OAK TREE ORTHOPEDICS INC

Practice address

4254 Green River Rd
Corona, CA 92878-3869

Phone

(657) 235-9355

NPI assigned

Sep 1, 2022

Last updated

Oct 20, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Nasser Heyrani, MDNPI 1730523945

Title

Owner

Phone

(657) 235-9355

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Locations

Subparts reporting this organization as parent 1

Organizations that report themselves as subparts in NPPES and name this organization, in the same state, as their parent.

• Heyrani Orthopedic Surgery Inc

  • Orthopaedic Surgery Physician
  • Corona, CA
  • NPI 1508762451
  NPPES parent name

Practitioners 4

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Nasser Heyrani, M.D.

  • Orthopaedic Surgery Physician
  • Corona, CA
  • NPI 1730523945
  Medicare reassignment NPD Authorized official
• Graeme Drew Matthewson, MD

  • Sports Medicine (Orthopaedic Surgery) Physician
  • Van Nuys, CA
  • NPI 1518578772
  Medicare reassignment NPD
• John Delacruzportugal

  • Physical Therapist
  • Rancho Cucamonga, CA
  • NPI 1144815689

  Physical Therapy

  NPD (past)
• Majid Saedifar, R.P.T.

  • Physical Therapist
  • Covina, CA
  • NPI 1538212873
  NPD (past)

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

{
    "created_epoch": "1661990400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1792454400000",
    "number": "1356061949",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2710 N BENTLEY ST",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928672258",
            "telephone_number": "657-235-9355"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4254 GREEN RIVER RD",
            "city": "CORONA",
            "state": "CA",
            "postal_code": "928783869",
            "telephone_number": "657-235-9355"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "20072 SW Birch St Ste 100",
            "address_purpose": "LOCATION",
            "city": "Newport Beach",
            "state": "CA",
            "postal_code": "926600794",
            "country_code": "US",
            "telephone_number": "657-235-9355",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "OAK TREE ORTHOPEDICS INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2022-09-01",
        "last_updated": "2026-10-20",
        "certification_date": "2026-10-20",
        "status": "A",
        "authorized_official_last_name": "HEYRANI",
        "authorized_official_first_name": "NASSER",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "657-235-9355",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "193400000X MULTIPLE SINGLE SPECIALTY GROUP",
            "desc": "Orthopaedic Surgery",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207XX0004X",
            "taxonomy_group": "193400000X MULTIPLE SINGLE SPECIALTY GROUP",
            "desc": "Orthopaedic Surgery, Foot and Ankle Surgery",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Orthopaedic Surgery Physician in Corona, CA
• Providers in Corona, CA by specialty
• Orthopaedic Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.