Ryan Joseph Longfellow, MD

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

81042 Issued in WI

Practice address

600 Highland Ave
Madison, WI 53792-1902

Phone

(608) 263-8100

Fax

(608) 262-6247

NPI assigned

Mar 25, 2014

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Electronic endpoints 3

Medicare fee-for-service enrollment

Enrolled in IN, 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

Anesthesiology

Education

Indiana University School of Medicine, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

University of Wisconsin Medical Foundation IncGroup PAC ID 6608785464, 2,537 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Wi Hospitals & Clinics Authority Hospital, Madison, WI, CCN 520098

Merit-based Incentive Payment System (MIPS)

Final score

83.32 of 100Reported as group

Quality

87.78

Promoting interoperability

77

Improvement activities

40

Cost

75.8

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rlongfellow461839@reidhealth.direct-ci.com

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.

• University of Wisconsin Medical Foundation, Inc

  • Multi-Specialty Clinic/Center
  • Middleton, WI
  • NPI 1598784555
  Medicare reassignment Care Compare group
• Arnett Clinic, LLC

  • Internal Medicine Physician
  • Lafayette, IN
  • NPI 1164490843

  Anesthesiology

  Medicare reassignment NPD
• Arnett Clinic, LLC

  • Durable Medical Equipment & Medical Supplies
  • Lafayette, IN
  • NPI 1699839563
  NPD
• Arnett Clinic, LLC

  • Clinical Medical Laboratory
  • Lafayette, IN
  • NPI 1881655090
  NPD
• University of Wisconsin Medical Foundation Inc

  • Durable Medical Equipment & Medical Supplies
  • Cross Plains, WI
  • NPI 1174583363
  NPD (past)
• University Hospitals Medical Group Inc

  • Multi-Specialty Clinic/Center
  • Cleveland, OH
  • NPI 1669499414

  Anesthesiology

  NPD (past)

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

• University of Wisconsin Hospitals and Clinics Authority

  • General Acute Care Hospital
  • Madison, WI
  • NPI 1922043744
  Care Compare affiliation

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

{
    "created_epoch": "1395705600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748304000000",
    "number": "1356768683",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7974 UW HEALTH CT",
            "city": "MIDDLETON",
            "state": "WI",
            "postal_code": "535625531"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537921902",
            "telephone_number": "608-263-8100",
            "fax_number": "608-262-6247"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "10525 W 124th Ave",
            "address_purpose": "LOCATION",
            "city": "Cedar Lake",
            "state": "IN",
            "postal_code": "463039275",
            "country_code": "US",
            "telephone_number": "219-805-1484",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5165 McCarty Ln",
            "address_purpose": "LOCATION",
            "city": "Lafayette",
            "state": "IN",
            "postal_code": "479058764",
            "country_code": "US",
            "telephone_number": "765-448-8000",
            "fax_number": "765-446-4695",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LONGFELLOW",
        "first_name": "RYAN",
        "middle_name": "JOSEPH",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-03-25",
        "last_updated": "2025-05-27",
        "certification_date": "2025-05-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "IN",
            "license": "01086496A",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "AK",
            "license": "143984",
            "primary": false
        },
        {
            "code": "207LP2900X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pain Medicine",
            "state": "WI",
            "license": "81042",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "WI",
            "license": "81042",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "rlongfellow461839@ReidHealth.direct-ci.com",
            "affiliation": "Y",
            "affiliationName": "Reid Physician Associates, Inc.",
            "address_1": "1100 Reid Pkwy",
            "city": "Richmond",
            "state": "IN",
            "country_code": "US",
            "postal_code": "473741157",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "rlongfellow1282908@direct.uwhealth.org",
            "affiliation": "N",
            "address_1": "600 Highland Ave",
            "city": "Madison",
            "state": "WI",
            "country_code": "US",
            "postal_code": "537921902",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "rlongfellow@direct.iuhealth.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "5165 McCarty Ln",
            "city": "Lafayette",
            "state": "IN",
            "country_code": "US",
            "postal_code": "479058764",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Micah Long, MD
• Sara C. Long, M.D.
• Susan Kay Long, A.T.C.
• Tia Jacqueline Long, M.S.
• Longevity Clinical LTC Associates of Wisconsin, SC
• Lauren Longhenry, AUD, CCC-A
• Joseph Michael Longino
• B Jack Longley, MD
• Chloe Longmire
• Angela Longmore

• Anesthesiology Physician in Madison, WI
• Providers in Madison, WI by specialty
• Anesthesiology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 27, 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.