Michael Steven Santillan, PA-C, CAQ-PSYCH

Primary specialty

Medical Physician AssistantTaxonomy code 363AM0700X

License

PA61412 Issued in CA

Practice address

26024 Acero
Mission Viejo, CA 92691-2768

Phone

(714) 545-5550

Fax

(949) 609-0374

NPI assigned

May 13, 2022

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

Electronic endpoints 1

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, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Pacific Neuropsychiatric Specialists IncGroup PAC ID 3375796170, 70 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: michaels@pnsi-ca.direct.office.nextgen.com

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.

• Pacific Neuropsychiatric Specialists Inc.

  • Psychiatry Physician
  • Costa Mesa, CA
  • NPI 1356685218
  Medicare reassignment Care Compare group
• Hoag Hospital

  • General Acute Care Hospital
  • Newport Beach, CA
  • NPI 1689864365
  NPD (past)

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

{
    "created_epoch": "1652400000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759190400000",
    "number": "1861139628",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "19782 MACARTHUR BLVD STE 300",
            "city": "IRVINE",
            "state": "CA",
            "postal_code": "926122417",
            "telephone_number": "714-545-5550",
            "fax_number": "949-991-2040"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "26024 ACERO",
            "city": "MISSION VIEJO",
            "state": "CA",
            "postal_code": "926912768",
            "telephone_number": "714-545-5550",
            "fax_number": "949-609-0374"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SANTILLAN",
        "first_name": "MICHAEL",
        "middle_name": "STEVEN",
        "name_prefix": "Mr.",
        "credential": "PA-C, CAQ-PSYCH",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-05-13",
        "last_updated": "2025-09-30",
        "certification_date": "2025-09-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "364SP0808X",
            "taxonomy_group": "",
            "desc": "Clinical Nurse Specialist, Psychiatric/Mental Health",
            "state": "CA",
            "license": "PA61412",
            "primary": false
        },
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "CA",
            "license": "PA61412",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "michael.santillan@westernu.edu",
            "affiliation": "N",
            "endpointDescription": "School Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "1554 Buena Vista Dr",
            "city": "Vista",
            "state": "CA",
            "country_code": "US",
            "postal_code": "920817421",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Christiana Hyo Jin Sanders, LMFT
• Stephen Jeffrey Sanders, AU.D.
• Sandler Nurse Practitioner Services
• Minerva Banzali Sansano, RN
• Nathan Allen Santibanez, PMHNP
• Michael J Santoro, M.D.
• Sanghee Ko Santoro
• John William Santos, P.T.
• Janelle Santucci, LMFT
• McAyla Sarno, PSY.D.

• Medical Physician Assistant in Mission Viejo, CA
• Providers in Mission Viejo, CA by specialty
• Medical Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 30, 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.