Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

MS. Antoinette Kathleen Martz, ARNP

Individual provider Nurse Practitioner · NPI 1437815016

MS. Antoinette Kathleen Martz, ARNP is a Nurse Practitioner in Dayton, Iowa. Qualified in 2021, 5 years ago. Practices with Hamilton County Public Hospital, a 33-clinician group. Licensed in Iowa.

Years since qualifying
5
Licensed in
IA
In the registry since
2021
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

See every abbreviation used in this directory →

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Practice location PO Box

The provider listed a PO Box rather than a street location, so this is not a walk-in address.

PO Box 634
Dayton, IA 50530-0634
Phone: (515) 570-8569
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence A166068 (IA)

Record details

NPI number1437815016
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorYes
NPI enumeratedNovember 9, 2021
Last updated in NPPESDecember 15, 2024
Certification dateDecember 15, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Hamilton County Public Hospital — 33 clinicians
Accepts Medicare assignment Not indicated

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Van Diest Medical Center Hospital · Webster City, IA

Colleagues at Hamilton County Public Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 33 clinicians in the practice; 12 are shown here.