Gregory Jackson Aycock, CAA

Primary specialty

Anesthesiologist AssistantTaxonomy code 367H00000X

License

618 Issued in WI

Practice address

600 Highland Ave
Madison, WI 53792-0001

Phone

(608) 263-8100

NPI assigned

Oct 3, 2005

Last updated

Jun 5, 2026By 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 5

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IN, WI2 enrollments

Enrollment records 2

Specialty

Anesthesiology Assistant

Education

Other, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Iu Health Medical Group LLCGroup PAC ID 9638617913, 4,382 clinicians

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

Practice addresses (Care Compare)

Hospital & facility affiliations

• Indiana University Health Hospital, Indianapolis, IN, CCN 150056
• University of Wi Hospitals & Clinics Authority Hospital, Madison, WI, CCN 520098

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gaycock@direct.iuhealth.org

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.

• Iu Health Medical Group, LLC

  • General Practice Physician
  • Indianapolis, IN
  • NPI 1326893777
  Medicare reassignment Care Compare group NPD
• University of Wisconsin Medical Foundation, Inc

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

  • Anesthesiology Physician
  • Indianapolis, IN
  • NPI 1285684407
  Medicare reassignment NPD
• Holiday CVS L.L.C.

  dba Cvs Pharmacy #17915

  • Pharmacy
  • Wesley Chapel, FL
  • NPI 1770467466
  NPD (past)

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

• University of Wisconsin Hospitals and Clinics Authority

  dba University of Wisconsin Hospital and Clinics

  • General Acute Care Hospital
  • Madison, WI
  • NPI 1922043744
  Care Compare affiliation
• Indiana University Health Inc

  dba Indiana University Health

  • General Acute Care Hospital
  • Indianapolis, IN
  • NPI 1144266024
  Care Compare affiliation

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

{
    "created_epoch": "1128297600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780617600000",
    "number": "1215924527",
    "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": "537920001",
            "telephone_number": "608-263-8100"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "615 S New Ballas Rd Dept Of",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631418221",
            "country_code": "US",
            "telephone_number": "636-386-9224",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "15 E New Haven Ave",
            "address_purpose": "LOCATION",
            "city": "Melbourne",
            "state": "FL",
            "postal_code": "329014403",
            "country_code": "US",
            "telephone_number": "321-409-3941",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1701 N Senate Blvd",
            "address_purpose": "LOCATION",
            "city": "Indianapolis",
            "state": "IN",
            "postal_code": "462021239",
            "country_code": "US",
            "telephone_number": "317-274-0275",
            "fax_number": "317-274-0256",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AYCOCK",
        "first_name": "GREGORY",
        "middle_name": "JACKSON",
        "credential": "CAA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-10-03",
        "last_updated": "2026-06-05",
        "certification_date": "2026-06-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "MO",
            "license": "PENDING",
            "primary": false
        },
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "WI",
            "license": "618",
            "primary": true
        },
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "IN",
            "license": "75000176A",
            "primary": false
        },
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "FL",
            "license": "PS40328",
            "primary": false
        },
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "NC",
            "license": "17641",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "ANTHEM PTAN",
            "identifier": "1103727700",
            "state": "IN"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "gaycock@direct.iuhealth.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1701 N Senate Blvd",
            "city": "Indianapolis",
            "state": "IN",
            "country_code": "US",
            "postal_code": "462021239",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Pamela Avery, MD
• Gregory D Avey, M.D.
• Aaron Axelbaum, MD
• Andrea L Axtell, MD
• Jisselle Ayala
• Ilayda Aydin, MD
• Abigail Ayers
• Oghenetega Esther Ayisire-Salako, MBCHB
• Juliet L Aylward, MD
• Laronda Ruth Ayo, LMFT

• Anesthesiologist Assistant in Madison, WI
• Providers in Madison, WI by specialty
• Anesthesiologist Assistant in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.