Riverview Surgical Center LLC

Primary specialty

Ambulatory Surgical Clinic/CenterTaxonomy code 261QA1903X

Legal business name

RIVERVIEW SURGICAL CENTER LLC

Practice address

201 E 4TH Street
South Sioux City, NE 68776

Phone

(712) 224-3033

Fax

(712) 224-3037

NPI assigned

Mar 12, 2019

Organization subpart

No

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

Authorized official

Name

Matt Niemeier

Title

Ceo

Phone

(402) 412-2160

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in NE

Enrollment records 1

Listed as

Riverview Surgical Center LLCCCN 28C0001065

Medicare certification status

ActiveFrom the Provider of Services file

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

CLIA laboratory certificates

Locations

Practitioners 7

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• John Joseph Anzalone, DPT

  • Physical Therapist
  • Sioux City, IA
  • NPI 1437407061
  NPD
• Joanie M Columbia, M.D.

  • Orthopaedic Hand Surgery Physician
  • Green Bay, WI
  • NPI 1558597526
  NPD
• Marwan F Jarmakani, M.D.

  • Vascular & Interventional Radiology Physician
  • Oklahoma City, OK
  • NPI 1972572386
  NPD
• Steven M Udelhofen, DO

  • Surgery Physician
  • Iowa City, IA
  • NPI 1457581308
  NPD
• Aaron Timothy Althaus, MD

  • Orthopaedic Surgery Physician
  • Dakota Dunes, SD
  • NPI 1518195619
  NPD (past)
• Michael Doarn, MD

  • Orthopaedic Surgery Physician
  • Temple Terrace, FL
  • NPI 1104053966
  NPD (past)
• Phinit Phisitkul, MD

  • Orthopaedic Foot and Ankle Surgery Physician
  • Dakota Dunes, SD
  • NPI 1205090297
  NPD (past)

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

{
    "created_epoch": "1552348800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1753056000000",
    "number": "1003374711",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "201 E 4TH ST STE 100",
            "city": "SOUTH SIOUX CITY",
            "state": "NE",
            "postal_code": "687769928",
            "telephone_number": "402-412-2160",
            "fax_number": "402-412-2100"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "201 E 4TH STREET",
            "city": "SOUTH SIOUX CITY",
            "state": "NE",
            "postal_code": "68776",
            "telephone_number": "712-224-3033",
            "fax_number": "712-224-3037"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "RIVERVIEW SURGICAL CENTER LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2019-03-12",
        "last_updated": "2025-07-21",
        "certification_date": "2025-07-21",
        "status": "A",
        "authorized_official_last_name": "NIEMEIER",
        "authorized_official_first_name": "MATT",
        "authorized_official_title_or_position": "CEO",
        "authorized_official_telephone_number": "402-412-2160"
    },
    "taxonomies": [
        {
            "code": "261QA1903X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Ambulatory Surgical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Greg Ringling, MA,CCC-SP
• Melanie Rios
• Caroline Rivera
• Riverview Center for Healthcare and Rehabilitation
• Riverview Senior Living LLC
• Seth Thomas Roberg, DPT
• Robyn Watchorn Newbrey, LLC
• Jordan Rochester, BSW
• Sonia J Rodriguez
• Krista Roeber, LIMHP

• Ambulatory Surgical Clinic/Center in South Sioux City, NE
• Providers in South Sioux City, NE by specialty
• Ambulatory Surgical Clinic/Center in Nebraska

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