Ahdad Ziyar, M.D., Inc.

Primary specialty

Allergy & Immunology (Internal Medicine) PhysicianTaxonomy code 207RA0201X

Legal business name

AHDAD ZIYAR, M.D., INC.

Practice address

801 N Tustin Ave Ste 605
Santa Ana, CA 92705-3610

Phone

(714) 584-9930

NPI assigned

Feb 21, 2023

Organization subpart

No

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

Authorized official

Name

Ahdad Ziyar, MDNPI 1205330685

Title

Physician

Phone

(213) 282-7603

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Locations

Practitioners 1

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.

• Ahdad Ziyar

  • Allergy & Immunology Physician
  • Santa Ana, CA
  • NPI 1205330685
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1676937600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1764288000000",
    "number": "1124726989",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7335 N 1ST ST STE 102",
            "city": "FRESNO",
            "state": "CA",
            "postal_code": "937202968",
            "telephone_number": "559-449-1209"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "801 N TUSTIN AVE STE 605",
            "city": "SANTA ANA",
            "state": "CA",
            "postal_code": "927053610",
            "telephone_number": "714-584-9930"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "AHDAD ZIYAR, M.D., INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2023-02-21",
        "last_updated": "2025-11-28",
        "certification_date": "2025-11-28",
        "status": "A",
        "authorized_official_last_name": "ZIYAR",
        "authorized_official_first_name": "AHDAD",
        "authorized_official_title_or_position": "PHYSICIAN",
        "authorized_official_telephone_number": "213-282-7603",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RA0201X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Allergy & Immunology",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ruth Elizabeth Aguirre
• Valeria Aguirre
• Rylee Agulto, COTA
• Gloria Anne Aguon, RN, PHN
• Brihana Alexia Agyepong
• Rebecca S Ahlers, DDS
• Ahmad Hajj MD Inc
• Ramadhan Ahmed
• Samia Ahmed, BCBA
• Angelica Kaisa Ahonen, DNP, APRN

• Allergy & Immunology (Internal Medicine) Physician in Santa Ana, CA
• Providers in Santa Ana, CA by specialty
• Allergy & Immunology (Internal Medicine) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 28, 2025; 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.