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MS. ANTOINETTE KATHLEEN MARTZ ARNP
NPI 1437815016
Nurse Practitioner in Dayton, IA

Active since November 09, 2021PECOS Enrolled

NPPES record last updated: December 15, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 15, 2024, Aug 2, 2022, Nov 16, 2021 and 1 more (4 updates tracked since 2021).

About Ms. Antoinette Kathleen Martz Arnp NPPES

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

MS. ANTOINETTE KATHLEEN MARTZ ARNP (NPI 1437815016) is an individual nurse practitioner in Dayton, Iowa, licensed in Iowa (A166068) and active in the NPI registry since November 2021. She is enrolled in Medicare PECOS, is affiliated with Van Diest Medical Center, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1437815016
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMS. ANTOINETTE KATHLEEN MARTZCredential: ARNP
Location AddressPO BOX 634Dayton, IA 50530-0634
Mailing Address2350 Hospital DrWebster City, IA 50595-6600 · (515) 570-8569
Phone(515) 570-8569
Sole ProprietorYes
Medical School CMSOtherGraduated 2021
Enumeration DateNovember 9, 2021
Last NPPES UpdateDecember 15, 20244 updates tracked since enumeration
NPPES CertifiedDecember 15, 2024
✔ NPI 1437815016 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in IA · A166068
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
PO BOX 634, Dayton, IA 50530
Open in Google Maps ↗

Other Identifiers 1

OtherA166068IA · Nurse Practitioner Number

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 (PECOS)

Ms. Antoinette Kathleen Martz Arnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4284024340
PECOS Enrollment IDI20211203000362
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 Antoinette Martz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hamilton County Public Hospital
9.4 mi
Rural Health
817 SHAKESPEARE AVE
Stratford, IA 50249
  • Reassigned Medicare billing, Iowa enrollment
  • 70 clinicians in this Medicare group
NPI 1497957351 (515) 838-2100

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.

Van Diest Medical Center

Critical Access Hospitals · Webster City, IA
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number161361
Location2350 Hospital DriveWebster City, IA 50595 · Hamilton County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50530 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.

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 Antoinette Martz's NPI number?

The NPI number for Antoinette Martz is 1437815016. It was assigned to this individual provider in the NPPES registry on November 9, 2021.

Where is Antoinette Martz located?

Antoinette Martz practices at PO Box 634, Dayton, IA 50530. The listed phone number is (515) 570-8569.

What is Antoinette Martz's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Antoinette Martz enrolled in Medicare?

Yes. Antoinette Martz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Antoinette Martz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Antoinette Martz reassigns Medicare benefits to Hamilton County Public Hospital (Stratford, 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 Antoinette Martz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Antoinette Martz 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 Antoinette Martz 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 Antoinette Martz affiliated with any hospitals?

According to CMS data, Antoinette Martz is affiliated with Van Diest Medical Center.

When was this NPI record last updated?

The NPPES record for Antoinette Martz was last updated on December 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.