David B Okun, M.D.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

G29859 Issued in CA

Practice address

24953 Paseo de Valencia
#25B
Laguna Hills, CA 92653-4342

Phone

(949) 770-8168

Fax

(949) 770-2991

NPI assigned

Aug 26, 2005

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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

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.

• Minch K. Fong M.D. Inc.

  • Hematology & Oncology Physician
  • Mission Viejo, CA
  • NPI 1629307665
  NPD (past)

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

{
    "created_epoch": "1125014400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1306839287",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "24953 PASEO DE VALENCIA",
            "address_2": "#25B",
            "city": "LAGUNA HILLS",
            "state": "CA",
            "postal_code": "926534342",
            "telephone_number": "949-770-8168",
            "fax_number": "949-770-2991"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "24953 PASEO DE VALENCIA",
            "address_2": "#25B",
            "city": "LAGUNA HILLS",
            "state": "CA",
            "postal_code": "926534342",
            "telephone_number": "949-770-8168",
            "fax_number": "949-770-2991"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OKUN",
        "first_name": "DAVID",
        "middle_name": "B",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-08-26",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "G29859",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G298590",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Roger V. Ohanesian, M.D.
• Manouel Ohanesyan Salmas
• Adelaide Ojeda
• Olafeyide Ojeisekhoba, FNP-C
• Kevin Okuda
• Katryna Fedora Olarte
• Michelle Sofia Olea
• Olex & Madany, a Professional Dental Corporation
• Ryan Oliver, PA-C
• Deann Olson

• Hematology & Oncology Physician in Laguna Hills, CA
• Providers in Laguna Hills, CA by specialty
• Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.