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MR. ALEC MARSHALL ANTANAITIS
NPI 1104715770
Nurse Practitioner - Gerontology in Jefferson, IA

Active since June 30, 2025PECOS EnrolledAccepts Medicare Assignment
1000 W LINCOLN WAY, JEFFERSON, IA 50129(515) 386-2114(515) 386-8899 Get Directions Write a Review

NPPES record last updated: March 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 13, 2026, Jun 30, 2025 (2 updates tracked since 2025).

About Mr. Alec Marshall Antanaitis NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. ALEC MARSHALL ANTANAITIS (NPI 1104715770) is an individual gerontology provider in Jefferson, Iowa, licensed in Iowa (H184694) and active in the NPI registry since June 2025. He is enrolled in Medicare PECOS, is affiliated with Greene County Medical Center, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1104715770
Entity TypeIndividualMale
Primary Taxonomy363LG0600X
Provider Legal NameMR. ALEC MARSHALL ANTANAITIS
Location Address1000 W LINCOLN WAYJefferson, IA 50129-1685
Mailing Address1002 W Lincoln WayJefferson, IA 50129-1645 · (515) 386-0500 · Fax (515) 386-8899
Phone(515) 386-2114
Fax(515) 386-8899
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateJune 30, 2025
Last NPPES UpdateMarch 13, 20262 updates tracked since enumeration
NPPES CertifiedMarch 13, 2026
✔ NPI 1104715770 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · GerontologyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LG0600X
License✔ Licensed in IA · H184694
1000 W LINCOLN WAY, Jefferson, IA 50129
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Alec Marshall Antanaitis is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4183114630
PECOS Enrollment IDI20251104003117
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alec Antanaitis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Greene County Medical Center
Same address
Multi-Specialty
1000 W LINCOLN WAY
Jefferson, IA 50129
  • Reassigned Medicare billing, Iowa enrollment
  • Also billed through NPI 1083654883 (Iowa)
  • 28 clinicians in this Medicare group
NPI 1245260652 (515) 386-2114

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Greene County Medical Center

Critical Access Hospitals · Jefferson, IA
OwnershipGovernment - Local
CMS Certification Number161325
Location1000 West Lincoln WayJefferson, IA 50129 · Greene County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50129 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$81.84 typical visit price
range $52.96 – $161.40
Typical copayment $20.46 (range $13.24 – $40.35)
Most-billed visit code 99203
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TAYLAN ENTRIKEN
Physical Therapy Assistant
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-4284
MRS. DAWN ELIZABETH TINGWALD ARNP
Nurse Practitioner (Family)
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-0500
GREENE COUNTY MEDICAL CENTER
General Acute Care Hospital (Critical Access)
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-2114
SARAH KILBOURN
Occupational Therapist
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-0284
GREENE COUNTY MEDICAL CENTER
Orthopaedic Surgery
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-2114
ASHLEY BEEKMAN
Physical Therapy Assistant
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-4284
GREENE COUNTY MEDICAL CENTER
Clinic/Center (Multi-Specialty)
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-2114
KASSIDY HACKBARTH
Occupational Therapist
1000 W LINCOLN WAY
JEFFERSON, IA 50129
Greene County (515) 386-4284

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alec Antanaitis's NPI number?

The NPI number for Alec Antanaitis is 1104715770. It was assigned to this individual provider in the NPPES registry on June 30, 2025.

Where is Alec Antanaitis located?

Alec Antanaitis practices at 1000 W Lincoln Way, Jefferson, IA 50129. The listed phone number is (515) 386-2114.

What is Alec Antanaitis's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Is Alec Antanaitis enrolled in Medicare?

Yes. Alec Antanaitis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Alec Antanaitis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alec Antanaitis reassigns Medicare benefits to Greene County Medical Center (Jefferson, IA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alec Antanaitis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alec Antanaitis accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Wellmark Health Plan of Iowa, Inc. list Alec Antanaitis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Alec Antanaitis affiliated with any hospitals?

According to CMS data, Alec Antanaitis is affiliated with Greene County Medical Center.

When was this NPI record last updated?

The NPPES record for Alec Antanaitis was last updated on March 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.