Auston Daniel Stiefer

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

DR.0077405 Issued in CO

Practice address

12700 E 19TH Ave # 9C03
Aurora, CO 80045-2560

Phone

(303) 724-9287

NPI assigned

Jan 31, 2020

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in CO

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 1

Specialty

Internal Medicine

Education

University of Oklahoma College of Medicine, 2022

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

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.

• Critical Care Pulmonary and Sleep Associates Professional LLP

  • Critical Care Medicine (Internal Medicine) Physician
  • Lakewood, CO
  • NPI 1437100039
  Medicare reassignment

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

{
    "created_epoch": "1580428800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774483200000",
    "number": "1356972053",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12700 E 19TH AVE # 9C03",
            "city": "AURORA",
            "state": "CO",
            "postal_code": "800452560"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12700 E 19TH AVE # 9C03",
            "city": "AURORA",
            "state": "CO",
            "postal_code": "800452560",
            "telephone_number": "303-724-9287"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "STIEFER",
        "first_name": "AUSTON",
        "middle_name": "DANIEL",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-01-31",
        "last_updated": "2026-03-26",
        "certification_date": "2026-03-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "CO",
            "license": "DR.0077405",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CO",
            "license": "DR.0077405",
            "primary": true
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "CO",
            "license": "DR.0077405",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Craig Martin Stice, DC
• Caitlin Stichter, LPC
• Timothy Stidham, MD
• Christina Stiebris, MD
• Sarah Stiefbold, MA
• Gregory Stiegmann, MD
• Regan Ashley Stiegmann, DO
• Stacy Dawn Claycomb Stiell, AUD
• Makayla Stier
• Chloe Alexandra Stiggelbout, MD

• Internal Medicine Physician in Aurora, CO
• Providers in Aurora, CO by specialty
• Internal Medicine Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 26, 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.