Aaron E Ratliff, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

86256-20 Issued in WI

Practice address

5000 W Chambers St
Milwaukee, WI 53210-1650

Phone

(414) 447-2000

NPI assigned

May 6, 2022

Sex

Male

Sole proprietor

Yes

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 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

Internal MedicineAlso: Hospitalist

Education

Ohio State University College of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ascension Medical Group-Southeast Wisconsin IncGroup PAC ID 8628980943, 551 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension SE Wisconsin Hospital Hospital, Milwaukee, WI, CCN 520136

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Ascension Medical Group-Southeast Wisconsin Inc

  dba Ascension Medical Group

  • Internal Medicine Physician
  • Glendale, WI
  • NPI 1609881077
  Medicare reassignment Care Compare group NPD
• Ascension Medical Group-Fox Valley Wisconsin, Inc

  dba Ascension Medical Group

  • Multi-Specialty Clinic/Center
  • Neenah, WI
  • NPI 1730126392
  Medicare reassignment NPD
• Columbia St. Mary'S Hospital Milwaukee, Inc

  dba Ascension Columbia St Mary's Hospital Milwaukee

  • Multi-Specialty Clinic/Center
  • Milwaukee, WI
  • NPI 1023064482
  Medicare reassignment NPD
• Ascension Medical Group-Fox Valley Wisconsin, Inc

  • Cardiovascular Disease Physician
  • Appleton, WI
  • NPI 1831890177
  NPD
• Columbia St. Mary'S Hospital Milwaukee Inc

  dba Ascension Columbia St Mary's Hospital Milwaukee

  • Multi-Specialty Clinic/Center
  • Milwaukee, WI
  • NPI 1225071491
  NPD
• Columbia St. Mary'S Hospital Milwaukee Inc

  dba Ascension Columbia St Mary's Hospital Ozaukee

  • Psychiatric Hospital Unit
  • Mequon, WI
  • NPI 1417600909
  NPD

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

• Ascension SE Wisconsin Hospital, Inc

  dba Ascension SE Wisconsin Hospital-Elmbrook Campus

  • General Acute Care Hospital
  • Milwaukee, WI
  • NPI 1427007384
  Care Compare affiliation
• Ascension SE Wisconsin Hospital, Inc

  dba Ascension SE Wisconsin Hospital-Elmbrook Campus

  • Rehabilitation Hospital Unit
  • Brookfield, WI
  • NPI 1861417362
  Care Compare affiliation

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

{
    "created_epoch": "1651795200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1538805213",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5000 W CHAMBERS ST",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532101650",
            "telephone_number": "414-447-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5000 W CHAMBERS ST",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532101650",
            "telephone_number": "414-447-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "RATLIFF",
        "first_name": "AARON",
        "middle_name": "E",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-05-06",
        "last_updated": "2025-09-11",
        "certification_date": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "86256-20",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WI",
            "license": "86256-20",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathryn Louise Andrae Rathod, PA-C
• Sawai Singh Rathore, MD
• Rajendra S Rathour, MD
• Crystal Ratka
• Amy Ratkowski, DNP, NNP
• Rose M Ratliff, OWNER
• Shanette Rattler
• Kelsey Charlene Ratz, ADULT FAMILY HOME
• Daniel Christian Rice Ratzlaff, MD
• Jenifer Ratzow

• Internal Medicine Physician in Milwaukee, WI
• Providers in Milwaukee, WI by specialty
• Internal Medicine Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.