Bryan Hartland Lassner, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

75454-20 Issued in WI

Practice address

707 S University Ave
Beaver Dam, WI 53916-3027

Phone

(920) 887-6606

NPI assigned

Apr 3, 2012

Last updated

Jul 3, 2025By the provider in NPPES

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

Medicare fee-for-service enrollment

Enrolled in IL, WI2 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

Emergency Medicine

Education

Other, 2012

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ihc Beaver Dam Emergency Physicians, LLCGroup PAC ID 8123129657, 24 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Marshfield Medical Center - Beaver Dam (MMC-BD) Hospital, Beaver Dam, WI, CCN 520076

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: bryan.lassner@marshfieldclinichealthsystem.cernerdirect.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Ihc Beaver Dam Emergency Physicians, LLC

  • Emergency Medicine Physician
  • Beaver Dam, WI
  • NPI 1912109836
  Medicare reassignment Care Compare group NPD
• Insight Chicago, Inc.

  dba Insight Hospital & Medical Center Chicago

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1881261006
  Medicare reassignment NPD
• MCHS Hospitals Inc

  dba Marshfield Medical Center

  • Clinic/Center
  • Marshfield, WI
  • NPI 1093221434

  Emergency Medicine

  NPD
• Insight Chicago, Inc.

  dba Insight Hospital & Medical Center Chicago

  • Rehabilitation Hospital Unit
  • Chicago, IL
  • NPI 1154308518
  NPD

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

• Beaver Dam Community Hospitals Inc

  dba Marshfield Medical Center - Beaver Dam

  • General Acute Care Hospital
  • Beaver Dam, WI
  • NPI 1023187416
  Care Compare affiliation
• Beaver Dam Community Hospitals Inc

  dba (Inactive) Marshfield Medical Center - Beaver Dam Specialty Clinic

  • Clinic/Center
  • Beaver Dam, WI
  • NPI 1508184896

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1333411200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751500800000",
    "number": "1871859884",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2812 S DELAWARE AVE",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532072515",
            "telephone_number": "503-740-2391"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "707 S UNIVERSITY AVE",
            "city": "BEAVER DAM",
            "state": "WI",
            "postal_code": "539163027",
            "telephone_number": "920-887-6606"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2500 Metrohealth Dr",
            "address_purpose": "LOCATION",
            "city": "Cleveland",
            "state": "OH",
            "postal_code": "441091900",
            "country_code": "US",
            "telephone_number": "216-778-7800",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "701 W North Ave",
            "address_purpose": "LOCATION",
            "city": "Melrose Park",
            "state": "IL",
            "postal_code": "601601699",
            "country_code": "US",
            "telephone_number": "708-538-4975",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LASSNER",
        "first_name": "BRYAN",
        "middle_name": "HARTLAND",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-04-03",
        "last_updated": "2025-07-03",
        "certification_date": "2025-07-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": "336098920",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "WI",
            "license": "75454-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Amy Lanphier, COTA
• Trey Elliot Larant, DPT
• Larsen Family Dental S.C.
• Andrea Kay Larsen, DDS
• Paul Larson, DPT
• Jessica Marie Lawrence
• Mike Leahan, RPH
• Hannah E Lein, SAC-IT
• Lentscher Brothers LLC (Beaver Dam Chiroprctic Clinic)
• Jacob Carl Lentscher, D.C.

• Emergency Medicine Physician in Beaver Dam, WI
• Providers in Beaver Dam, WI by specialty
• Emergency Medicine Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 3, 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.