Sienna Contreras, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

10012 Issued in AZ

Practice address

1675 E Melrose St Ste 101-103
Gilbert, AZ 85297-1001

Phone

(602) 648-5444

Fax

(602) 772-3801

NPI assigned

Jan 5, 2022

Last updated

Aug 25, 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

Other names 1

• Sienna Anderson Former name

Medicare fee-for-service enrollment

Enrolled in AZ

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, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Orthopedic Specialists of North America PLLCGroup PAC ID 7719014505, 310 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

85.77 of 100Reported as group

Quality

81.6

Improvement activities

40

Cost

77.61

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

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.

• Orthopedic Specialists of North America, PLLC

  dba OrthoArizona

  • Orthopaedic Surgery Physician
  • Phoenix, AZ
  • NPI 1770812828
  Medicare reassignment Care Compare group NPD
• Primary Care Practice of Arizona, PLLC

  dba Gateway Urgent Care

  • Urgent Care Clinic/Center
  • Gilbert, AZ
  • NPI 1265904247
  Medicare reassignment NPD
• Orthopedic Specialists of North America, PLLC

  dba OrthoArizona

  • Orthopaedic Surgery Physician
  • Gilbert, AZ
  • NPI 1962292870
  NPD
• Primary Care Practice of Arizona, PLLC

  • Urgent Care Clinic/Center
  • Gilbert, AZ
  • NPI 1023970704
  NPD

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

{
    "created_epoch": "1641340800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787616000000",
    "number": "1720749377",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 80217",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850600217",
            "telephone_number": "602-385-2115",
            "fax_number": "480-418-3323"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1675 E MELROSE ST STE 101-103",
            "city": "GILBERT",
            "state": "AZ",
            "postal_code": "852971001",
            "telephone_number": "602-648-5444",
            "fax_number": "602-772-3801"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CONTRERAS",
        "first_name": "SIENNA",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-01-05",
        "last_updated": "2026-08-25",
        "certification_date": "2026-08-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "AZ",
            "license": "10012",
            "primary": true
        },
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "AZ",
            "license": "10012",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "SIENNA",
            "last_name": "ANDERSON",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Constitutional Health LLC
• Continue Care Clinic
• Continued Care Clinic PLLC
• Continuum Wellness Clinic, LLC
• Mayra Alejandra Contreras, SLPA
• Ashley Marie Conway, PA-C
• Hannah Cook-Kelley
• Beth Cook
• Brodie Cook, DMD
• Kimberly Cook, M.S., PA-C

• Physician Assistant in Gilbert, AZ
• Providers in Gilbert, AZ by specialty
• Physician Assistant in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 25, 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.