Michael Owen Walker, PA

Primary specialty

Surgical Physician AssistantTaxonomy code 363AS0400X

License

PA17200 Issued in CA

Practice address

360 San Miguel Dr
Suite 701
Newport Beach, CA 92660-7853

Phone

(949) 759-3600

Fax

(949) 759-0282

NPI assigned

Jun 27, 2006

Last updated

Sep 11, 2025By the provider in NPPES

Sex

Male

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 CA

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, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Orthopaedic Specialty Institute Medical Group of Orange CountyGroup PAC ID 5395631931, 64 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

Interoperability endpoints

• Direct secure messaging: michael.walker.p27@direct.newportmed.nextgenshare.com
• Direct secure messaging: michael.walker.p3@direct.newportmed.nextgenshare.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.

• Orthopaedic Specialty Institute Medical Group of Orange County

  • Orthopaedic Surgery Physician
  • Orange, CA
  • NPI 1336228832
  Medicare reassignment Care Compare group

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

{
    "created_epoch": "1151366400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1346277084",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "360 SAN MIGUEL DR",
            "address_2": "SUITE 701",
            "city": "NEWPORT BEACH",
            "state": "CA",
            "postal_code": "926607853",
            "telephone_number": "949-759-3600",
            "fax_number": "949-759-0282"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "360 SAN MIGUEL DR",
            "address_2": "SUITE 701",
            "city": "NEWPORT BEACH",
            "state": "CA",
            "postal_code": "926607853",
            "telephone_number": "949-759-3600",
            "fax_number": "949-759-0282"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALKER",
        "first_name": "MICHAEL",
        "middle_name": "OWEN",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-27",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA17200",
            "primary": false
        },
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "CA",
            "license": "PA17200",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Walcott Dialysis LLC (Newport Irvine Dialysis)
• Jamie Waldbaum
• Stephanie Waldman, MD
• Mykiyaa Marvella Walker-Sanchez
• Lorraine Annette Walker, M.D.
• Todd Michael Walkow, DMD
• Michelle Wall, P.T.
• Casey Stephen Wallace, DPT
• Melia Wallin, PSY.D.
• Shavvonne Walls

• Surgical Physician Assistant in Newport Beach, CA
• Providers in Newport Beach, CA by specialty
• Surgical Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.