NPIMap

Organization Active NPI

Arizona Surgical Specialists Center, LLC

  • Ambulatory Surgical Clinic/Center
  • Tempe, AZ
National Provider Identifier
1285767822
Registry record updated May 20, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Ambulatory Surgical Clinic/CenterTaxonomy code 261QA1903X
License
OSC6456 Issued in AZ
Legal business name
ARIZONA SURGICAL SPECIALISTS CENTER, LLC
Practice address
1984 E Baseline Rd
Tempe, AZ 85283-1535
Phone
(623) 742-1572
Fax
(623) 691-9498
NPI assigned
Mar 13, 2007
Organization subpart
No

NPPES NPI Registry

Updated by the provider on May 20, 2026

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

Authorized official

Name
Dr. Steven Siwek, MD
Title
President
Phone
(623) 516-8252

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Ambulatory Surgical Clinic/Center 261QA1903X OSC6456 AZ Primary

Addresses

Primary practice location

1984 E Baseline Rd
Tempe, AZ 85283-1535

Mailing address

9401 W Thunderbird Rd Ste 180
Peoria, AZ 85381-4210
Phone (623) 516-8252

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in AZ

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20050420000372 AZ Part B Supplier - Ambulatory Surgical Center 1254379399 Practice locations: Tempe, AZ

Other NPIs with the same Medicare PAC ID 3

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

Care Compare: Ambulatory surgical center

Medicare Care Compare
Listed as
Arizona Surgical Specialists Center LLCCCN 03C0001280
Medicare certification status
ActiveFrom the Provider of Services file

Laboratory certificates & supplier records

Derived by NPIMap

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

CLIA numberLaboratoryCertificateExpires
03D1026008Arizona Surgical Specialists Center1984 E Baseline Rd, Tempe, AZ 85283Certificate of waiverMay 23, 2028

National Provider Directory

National Provider Directory
Tax ID family
Arizona Surgical Specialists Center LLC4 organizations share this tax ID, including this one

Other organizations with this tax ID 3

Organizations that report the same tax identification number in the National Provider Directory.

Member of 1

Organizations this organization is a member of, according to the National Provider Directory.

Locations

17500 N Perimeter Dr
Ste 200
Scottsdale, AZ 85255
Phone (623) 742-1577

Ownership & related parties

Subparts reporting this organization as parent 4

Organizations that report themselves as subparts in NPPES and name this organization, in the same state, as their parent.

NPI Registry JSON

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

{
    "created_epoch": "1173744000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1779235200000",
    "number": "1285767822",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9401 W THUNDERBIRD RD STE 180",
            "city": "PEORIA",
            "state": "AZ",
            "postal_code": "853814210",
            "telephone_number": "623-516-8252",
            "fax_number": "623-516-8253"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1984 E BASELINE RD",
            "city": "TEMPE",
            "state": "AZ",
            "postal_code": "852831535",
            "telephone_number": "623-742-1572",
            "fax_number": "623-691-9498"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "ARIZONA SURGICAL SPECIALISTS CENTER, LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-03-13",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A",
        "authorized_official_last_name": "SIWEK",
        "authorized_official_first_name": "STEVEN",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "623-516-8252",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "261QA1903X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Ambulatory Surgical",
            "state": "AZ",
            "license": "OSC6456",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Tempe, AZ

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • 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.