Steven T Zierer, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

20445 Issued in AZ

Practice address

6020 E Arbor Ave
Suite 101
Mesa, AZ 85206-6102

Phone

(480) 985-1700

Fax

(480) 396-3659

NPI assigned

Sep 15, 2005

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 AZ, MT2 enrollments

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.

Enrollment records 2

Specialty

Gastroenterology

Education

Indiana University School of Medicine, 1989

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Kalispell Regional Medical Center IncGroup PAC ID 5294644381, 422 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Logan Health Medical Center Hospital, Kalispell, MT, CCN 270051

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: krmcmedicalrecords@krhdirect.org

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.

• Kalispell Regional Medical Center Inc

  • General Acute Care Hospital
  • Kalispell, MT
  • NPI 1417945627
  Medicare reassignment Care Compare group
• Arizona Digestive Health, PC

  • Gastroenterology Physician
  • Scottsdale, AZ
  • NPI 1992981583
  Medicare reassignment NPD
• Kalispell Regional Medical Center Inc

  • Clinic/Center
  • Kalispell, MT
  • NPI 1235333139
  NPD
• Kalispell Regional Medical Center, Inc

  • Radiology Clinic/Center
  • Whitefish, MT
  • NPI 1073362463
  NPD
• Kalispell Regional Medical Center, Inc

  • Clinic/Center
  • Kalispell, MT
  • NPI 1770183741
  NPD
• Southwest Medical Specialists PC

  • Gastroenterology Physician
  • Mesa, AZ
  • NPI 1780771840
  NPD (past)

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

• Kalispell Regional Medical Center Inc

  • Surgical Oncology Physician
  • Kalispell, MT
  • NPI 1053790063

  Hospital

  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • Maternal & Fetal Medicine Physician
  • Kalispell, MT
  • NPI 1053798710

  Hospital

  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • General Acute Care Hospital
  • Kalispell, MT
  • NPI 1417945627
  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • Hospice and Palliative Medicine (Family Medicine) Physician
  • Kalispell, MT
  • NPI 1477989770

  Hospital

  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • Nephrology Physician
  • Kalispell, MT
  • NPI 1700277837

  Hospital

  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • Hematology & Oncology Physician
  • Kalispell, MT
  • NPI 1891151122

  Hospital

  Care Compare affiliation
• Kalispell Regional Medical Center Inc

  • Obstetrics & Gynecology Physician
  • Kalispell, MT
  • NPI 1972982981

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1126742400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745798400000",
    "number": "1366437337",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3020 E CAMELBACK RD",
            "address_2": "SUITE 301",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850145095",
            "telephone_number": "602-264-9100",
            "fax_number": "602-264-9101"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6020 E ARBOR AVE",
            "address_2": "SUITE 101",
            "city": "MESA",
            "state": "AZ",
            "postal_code": "852066102",
            "telephone_number": "480-985-1700",
            "fax_number": "480-396-3659"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "320 Sunnyview Ln",
            "address_purpose": "LOCATION",
            "city": "Kalispell",
            "state": "MT",
            "postal_code": "599013129",
            "country_code": "US",
            "telephone_number": "064-752-7441",
            "fax_number": "406-257-0304",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ZIERER",
        "first_name": "STEVEN",
        "middle_name": "T",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-15",
        "last_updated": "2025-04-28",
        "certification_date": "2025-04-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MT",
            "license": "141413",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "AZ",
            "license": "20445",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "krmcmedicalrecords@krhdirect.org",
            "affiliation": "Y",
            "affiliationName": "Kalispell Regional Medical Center, Inc",
            "address_1": "320 Sunnyview Ln",
            "city": "Kalispell",
            "state": "MT",
            "country_code": "US",
            "postal_code": "599013129",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Veronica M Ziccardi, PT
• Ryan Ziemba
• Ryan Evan Zien, PHARMD.
• Ziennas Home Care Assisted Living LLC
• Traci Anne Zieper, REGISTERED NURSE
• Melissa Ann Ziervogel, LPC
• Brian D Zilliox, PA-C
• Alisha Zimmer
• Jan Zimmerman-Colvin, RN
• Constance Lee Zimmerman, CCC-SLP

• Gastroenterology Physician in Mesa, AZ
• Providers in Mesa, AZ by specialty
• Gastroenterology Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 28, 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.