Mahnaz Shambayati, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA67676 Issued in CA

Practice address

1650 Adams Ave
Costa Mesa, CA 92626-4958

Phone

(949) 270-2100

Fax

(949) 650-4458

NPI assigned

Oct 23, 2014

Last updated

Jun 22, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in TX

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Legacy Healthcare Services IncGroup PAC ID 2163339722, 3,431 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Medical City Plano Hospital, Plano, TX, CCN 450651

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mahnaz.shambayati.1@30724.direct.athenahealth.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Catalyst Physician Group - NTX, PLLC

  • Family Medicine Physician
  • Plano, TX
  • NPI 1811677610
  Medicare reassignment NPD
• Primary Health Physicians, PLLC

  • Urgent Care Clinic/Center
  • Denton, TX
  • NPI 1770048704
  Medicare reassignment
• Legacy Healthcare Services Inc.

  • Physical Therapist
  • Cedar Park, TX
  • NPI 1871132357
  Care Compare group

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Columbia Medical Center of Plano Subsidiary LP

  dba Medical City Plano

  • General Acute Care Hospital
  • Plano, TX
  • NPI 1699726406
  Care Compare affiliation

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

{
    "created_epoch": "1414022400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782086400000",
    "number": "1639574395",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "20151 SW BIRCH ST STE 100",
            "city": "NEWPORT BEACH",
            "state": "CA",
            "postal_code": "926601794",
            "telephone_number": "949-270-2100",
            "fax_number": "949-650-4458"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1650 ADAMS AVE",
            "city": "COSTA MESA",
            "state": "CA",
            "postal_code": "926264958",
            "telephone_number": "949-270-2100",
            "fax_number": "949-650-4458"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SHAMBAYATI",
        "first_name": "MAHNAZ",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-10-23",
        "last_updated": "2026-06-22",
        "certification_date": "2026-06-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA67676",
            "primary": true
        },
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "CA",
            "license": "PA67676",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mehar Shahi
• Andrew Pierre Shahid
• Shahrestani Chiropractic Professional Corporation
• Babak Robert Shahrestani, DC
• Mohammad Rizwan Shaikh
• Andrea Paige Shandling, PA-C
• Adam Shandrow
• Margaret M Shannon, M.D.
• Victoria Shannon
• Brandon Kenneth Shapiro

• Physician Assistant in Costa Mesa, CA
• Providers in Costa Mesa, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 22, 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.