Ahdad Ziyar, - Medicare Allergy & Immunology in Santa Ana, CA

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Ahdad Ziyar, is a medicare enrolled "Allergy & Immunology" physician in Santa Ana, California. His current practice location is 801 N Tustin Ave Ste 605, Santa Ana, California. You can reach out to his office (for appointments etc.) via phone at (714) 584-9930.

Ahdad Ziyar is licensed to practice in California (license number A164647) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1205330685.

Contact Information

Ahdad Ziyar,
801 N Tustin Ave Ste 605,
Santa Ana, CA 92705-3610
(714) 584-9930
Not Available

Map and Direction




Physician's Profile

Full NameAhdad Ziyar
GenderMale
SpecialityAllergy & Immunology
Location801 N Tustin Ave Ste 605, Santa Ana, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1205330685
  • Provider Enumeration Date: 03/21/2018
  • Last Update Date: 11/28/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 6406287093
  • Enrollment ID: I20230614003553

Medical Identifiers

Medical identifiers for Ahdad Ziyar such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1205330685NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RA0201XInternal Medicine - Allergy & Immunology A164647 (California)Secondary
207K00000XAllergy & Immunology A164647 (California)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Ahdad Ziyar allows following entities to bill medicare on his behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710
Entity NameBaz Allergy Asthma & Sinus Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1710906995
PECOS PAC ID: 6507770716
Enrollment ID: O20031112000791
Entity NameSutter Bay Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013950807
PECOS PAC ID: 4284538778
Enrollment ID: O20031125000909
Entity NameAllergy Asthma And Immunology Associates Of Central California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1124726989
PECOS PAC ID: 5294174561
Enrollment ID: O20240418004140

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Ahdad Ziyar is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Ahdad Ziyar,
1702 E Utah Ave,
Fresno, CA 93720-1967

Ph: (559) 709-9257		Ahdad Ziyar,
801 N Tustin Ave Ste 605,
Santa Ana, CA 92705-3610

Ph: (714) 584-9930

Reviews and Comments


Allergy & Immunology Doctors in Santa Ana, CA

Dr. Jeremy Elliott Kaslow, M.D.
Allergy & Immunology
Medicare: Not Enrolled in Medicare
Practice Location: 720 N Tustin Ave Ste 202, Santa Ana, CA 92705
Phone: 714-565-1032    Fax: 714-565-1035

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.