Sigfredo Villarin Ayala Jr.

Primary specialty

Trauma Surgery PhysicianTaxonomy code 2086S0127X

License

202835 Issued in CA

Practice address

18300 Roscoe Blvd
Northridge, CA 91325-4105

Phone

(818) 885-8500

NPI assigned

Sep 1, 2016

Sex

Male

Sole proprietor

No

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.

• Compassionate Critical Care Group, Inc.

  • Pulmonary Disease Physician
  • Woodland Hills, CA
  • NPI 1295332633

  CA

  Medicare reassignment Care Compare group NPD
• Northridge Trauma Surgeons Inc a Medical Corporation

  • Surgery Physician
  • Northridge, CA
  • NPI 1255418745

  CA, Trauma Surgery

  Medicare reassignment Care Compare group NPD
• Villarin Surgical Services Professional Corporation

  • Trauma Surgery Physician
  • Northridge, CA
  • NPI 1487521183

  Trauma Surgery

  NPD Authorized official
• Banner-University Medical Group

  • Multi-Specialty Clinic/Center
  • Phoenix, AZ
  • NPI 1508809427

  Family Medicine

  NPD

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

• Dignity Community Care

  • General Acute Care Hospital
  • Northridge, CA
  • NPI 1417089350

  Hospital

  Care Compare affiliation

Specialty

General Surgery

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northridge Trauma Surgeons Inc a Medical Corporation 13 clinicians

Compassionate Critical Care Group, Inc. 14 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northridge Hospital Medical Center Hospital, Northridge, CA, CCN 050116

Procedures performed for Medicare patients

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: Yes

Green means eligible to order or refer.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

The complete NPPES record for this NPI in the NPI Registry API format, last updated by the provider on Nov 21, 2025.

{
    "created_epoch": "1472688000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763683200000",
    "number": "1467909044",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4915 NEWCASTLE AVE",
            "city": "ENCINO",
            "state": "CA",
            "postal_code": "913164210"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18300 ROSCOE BLVD",
            "city": "NORTHRIDGE",
            "state": "CA",
            "postal_code": "913254105",
            "telephone_number": "818-885-8500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "VILLARIN AYALA",
        "first_name": "SIGFREDO",
        "name_suffix": "Jr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-09-01",
        "last_updated": "2025-11-21",
        "certification_date": "2025-11-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086S0127X",
            "taxonomy_group": "",
            "desc": "Surgery, Trauma Surgery",
            "state": "CA",
            "license": "202835",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ruth Alondra Villalobos
• Sharon Villalobos
• Alejandra Villalta
• Cristal G Villanueva Santos
• Louise Anne Villanueva
• Villarin Surgical Services Professional Corporation
• Brandon Lucas Villarreal, M.D.
• J Luis R Villarreal, D,C,
• Estela Villasenor, HIS
• Karla Villeda

• All providers in Northridge, CA
• Trauma Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 21, 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.