Robert Elmer Sonnenburg Jr, M.D.

Primary specialty

Otolaryngology PhysicianTaxonomy code 207Y00000X

License

47907020 Issued in WI

Practice address

2845 Greenbrier Rd
Green Bay, WI 54311-6519

Phone

(920) 288-8230

Fax

(920) 288-8235

NPI assigned

Dec 9, 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

Other identifiers 4

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in WI

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

OtolaryngologyAlso: Allergy/Immunology

Education

Medical College of Wisconsin, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Baycare Clinic LLPGroup PAC ID 4385554328, 197 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Aurora Baycare Medical Ctr Hospital, Green Bay, WI, CCN 520193
• Aurora Medical Ctr Manitowoc County Hospital, Two Rivers, WI, CCN 520034
• Aurora Medical Center Bay Area Hospital, Marinette, WI, CCN 520113

Merit-based Incentive Payment System (MIPS)

Final score

86.21 of 100Reported as group

Quality

78.54

Promoting interoperability

100

Improvement activities

40

Cost

75.5

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rsonnenburg58216@direct.myadvocateaurora.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.

• Baycare Clinic LLP

  • Emergency Medicine Physician
  • Green Bay, WI
  • NPI 1588609648

  Otolaryngology

  Medicare reassignment Care Compare group NPD
• Baycare Clinic LLP

  • Durable Medical Equipment & Medical Supplies
  • Manitowoc, WI
  • NPI 1134490758
  NPD

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

• Aurora Health Care North, Inc.

  • General Acute Care Hospital
  • Two Rivers, WI
  • NPI 1477508687
  Care Compare affiliation
• Aurora Medical Center Bay Area, Inc

  • General Acute Care Hospital
  • Marinette, WI
  • NPI 1043397177
  Care Compare affiliation
• Aurora Medical Center Bay Area, Inc

  dba Aurora Medical Center Bay Area Clinical Medical Laboratory

  • Clinical Medical Laboratory
  • Marinette, WI
  • NPI 1083791115

  Hospital

  Care Compare affiliation
• Aurora Medical Center Bay Area, Inc

  dba Aurora Medical Center Bay Area

  • Land Ambulance
  • Marinette, WI
  • NPI 1427135557

  Hospital

  Care Compare affiliation
• Baycare Aurora, LLC

  • General Acute Care Hospital
  • Green Bay, WI
  • NPI 1255387726
  Care Compare affiliation

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

{
    "created_epoch": "1134086400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779148800000",
    "number": "1972588176",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1035 KEPLER DR",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543118320",
            "telephone_number": "920-490-9046",
            "fax_number": "920-405-8005"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2845 GREENBRIER RD",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543116519",
            "telephone_number": "920-288-8230",
            "fax_number": "920-288-8235"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SONNENBURG JR",
        "first_name": "ROBERT",
        "middle_name": "ELMER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-09",
        "last_updated": "2026-05-19",
        "certification_date": "2026-05-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Y00000X",
            "taxonomy_group": "",
            "desc": "Otolaryngology",
            "state": "WI",
            "license": "47907020",
            "primary": true
        },
        {
            "code": "207YS0012X",
            "taxonomy_group": "",
            "desc": "Otolaryngology, Sleep Medicine",
            "state": "WI",
            "license": "47907020",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "34628100",
            "state": "WI"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "4728376",
            "state": "MI"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "4728385",
            "state": "MI"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "4728367",
            "state": "MI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "rsonnenburg58216@direct.myadvocateaurora.org",
            "affiliation": "N",
            "address_1": "3117 Shore Dr",
            "city": "Marinette",
            "state": "WI",
            "country_code": "US",
            "postal_code": "541434293",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Elizabeth A Sommers, PAC
• George D Soncrant, DO
• Song Counseling LLC
• Hwe Jae Song, M.D.
• Arthur M Sonneland III, MD
• Gaurav Sood
• Alin Sora, MD
• Chad R Sorenson, HIS
• Susan J Sorenson, RN
• Brea A Sorge, APNP

• Otolaryngology Physician in Green Bay, WI
• Providers in Green Bay, WI by specialty
• Otolaryngology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 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.