Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Johnna Danner-Terlouw, ARNP

Individual provider Registered Nurse · NPI 1235567652

Johnna Danner-Terlouw, ARNP is a Nurse Practitioner in Des Moines, Iowa. Qualified in 2013, 13 years ago. Practices with Mahaska County Hospital, a 124-clinician group and accepts Medicare assignment. Licensed in Iowa and Illinois.

Years since qualifying
13
Licensed in
IA, IL
In the registry since
2013
Specialties on file
3
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 Address checks out

411 Laurel St Ste 2350
Des Moines, IA 50314-3026
Phone: (515) 280-4700
Fax: (152) 804-7015
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence J115080 (IA)
Registered Nurse Taxonomy 163W00000X · Licence 115080 (IA)
Registered Nurse Taxonomy 163W00000X · Licence 041375432 (IL)

Record details

NPI number1235567652
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorNo
NPI enumeratedOctober 22, 2013
Last updated in NPPESSeptember 16, 2021
Certification dateSeptember 16, 2021

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Mahaska County Hospital — 124 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients28
Services billed 72 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $120 6 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Mahaska Health Partnership Hospital · Oskaloosa, IA
  • Unitypoint Health - Des Moines Iowa Methodist Medi Hospital · Des Moines, IA

Colleagues at Mahaska County Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 124 clinicians in the practice; 12 are shown here.

Other providers in Des Moines