Femi B Ayanrino, MD

Primary specialty

Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X

License

47045 Issued in WI

Practice address

1506 S Oneida St
Appleton, WI 54915-1305

Phone

(920) 738-2000

NPI assigned

Sep 12, 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 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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-Fox Valley Wisconsin, Inc

  • Cardiovascular Disease Physician
  • Appleton, WI
  • NPI 1831890177
  NPD (past)
• Hospitalist Medicine Physicians of Front Royal, LLC

  • Internal Medicine Physician
  • Winchester, VA
  • NPI 1376850057
  NPD (past)
• Hospitalist Medicine Physicians of Virginia LLC

  • Internal Medicine Physician
  • Winchester, VA
  • NPI 1770756991
  NPD (past)

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

{
    "created_epoch": "1126483200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1619962180",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1506 S ONEIDA ST",
            "city": "APPLETON",
            "state": "WI",
            "postal_code": "549151305",
            "telephone_number": "920-738-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1506 S ONEIDA ST",
            "city": "APPLETON",
            "state": "WI",
            "postal_code": "549151305",
            "telephone_number": "920-738-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "AYANRINO",
        "first_name": "FEMI",
        "middle_name": "B",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-12",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "WI",
            "license": "47045",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WI",
            "license": "47045",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "34549500",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Avada Audiology & Hearing Care
• Rachael Averill, PHARMD.
• Bryan A Avery, MD
• Merici A Awe, MD
• Joanna Ayala-Rutter, MT-BC
• Rachell Renae Ayers, M.D.
• Faiza M Aziz, DO
• B.a. Israel LLC
• B.a.Israel LLC
• Karin S. Babcock, OT

• Critical Care Medicine (Internal Medicine) Physician in Appleton, WI
• Providers in Appleton, WI by specialty
• Critical Care Medicine (Internal Medicine) Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.