Alec Marshall Antanaitis

Primary specialty

Gerontology Nurse PractitionerTaxonomy code 363LG0600X

License

H184694 Issued in IA

Practice address

1000 W Lincoln Way
Jefferson, IA 50129-1685

Phone

(515) 386-2114

Fax

(515) 386-8899

NPI assigned

Jun 30, 2025

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in IA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Greene County Medical Center 16 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Greene County Medical Center Hospital, Jefferson, IA, CCN 161325

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: aantanaitis1165212@direct.unitypoint.org

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.

• Greene County Medical Center

  • Critical Access Hospital
  • Jefferson, IA
  • NPI 1083654883

  IA

  Medicare reassignment Care Compare group NPD
• Greene County Medical Center

  • Multi-Specialty Clinic/Center
  • Jefferson, IA
  • NPI 1245260652

  IA

  Medicare reassignment Care Compare group NPD
• Greene County Medical Center

  • Rural Health Clinic/Center
  • Jefferson, IA
  • NPI 1457825192
  Care Compare group NPD
• Greene County Medical Center

  • Public Health or Welfare Agency
  • Jefferson, IA
  • NPI 1073871471
  Care Compare group
• Greene County Medical Center

  • Medicare Defined Swing Bed Hospital Unit
  • Jefferson, IA
  • NPI 1629153176
  Care Compare group
• Greene County Medical Center

  • Orthopaedic Surgery Physician
  • Jefferson, IA
  • NPI 1134433923
  NPD
• St Luke'S Methodist Hospital

  • General Acute Care Hospital
  • Cedar Rapids, IA
  • NPI 1083708226
  NPD

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

• Greene County Medical Center

  • Critical Access Hospital
  • Jefferson, IA
  • NPI 1083654883

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1751241600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773360000000",
    "number": "1104715770",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1002 W LINCOLN WAY",
            "city": "JEFFERSON",
            "state": "IA",
            "postal_code": "501291645",
            "telephone_number": "515-386-0500",
            "fax_number": "515-386-8899"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 W LINCOLN WAY",
            "city": "JEFFERSON",
            "state": "IA",
            "postal_code": "501291685",
            "telephone_number": "515-386-2114",
            "fax_number": "515-386-8899"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ANTANAITIS",
        "first_name": "ALEC",
        "middle_name": "MARSHALL",
        "name_prefix": "Mr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-06-30",
        "last_updated": "2026-03-13",
        "certification_date": "2026-03-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LG0600X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Gerontology",
            "state": "IA",
            "license": "H184694",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Heather L Acton, PHARMD
• Taylor C Anglemyer, PHARMD
• Ashley Riphagen, LMHC, LLC
• Jennifer Lynn Bainbridge
• Ashley Beekman
• Madisyn Behrens, LMSW
• William L Brenny, OD

• All providers in Jefferson, IA
• Gerontology Nurse Practitioner in Iowa

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 13, 2026; 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.