NPPES file of Aug 9, 2026

Mattie Joy Testroet, ARNP

Nurse Practitioner · Waterloo, IA

Mattie Joy Testroet, ARNP is a nurse practitioner with a practice address in Waterloo, Iowa, and NPI 1356723399, issued on Jun 26, 2015. Check the license (Iowa A122571, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1356723399
Name
Mattie Joy Testroet
Credential
ARNP
Primary taxonomy
Nurse Practitioner 363L00000X
License number
A122571 IA
Self-reported in NPPES; status is on the state search
Practice location
3530 W 4TH St, Waterloo, IA 50701
Phone
(319) 233-2701
Enumerated
Jun 26, 2015
Record last updated
May 13, 2025
Fax
(319) 236-7993
Medicare enrollment
Enrolled (PECOS I20150814013321); may accept Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 1,294 in Iowa → Look up another NPI →

Also registered at 3530 W 4TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Julie Gleason, ARNPNurse Practitioner1164726139
  2. Zoe Schult, NPFamily Nurse Practitioner1336809375
  3. Pawina Subedi, MDMedical Oncology Physician1184277642

Verify Mattie Joy Testroet in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Iowa board licenses this profession
    Search for license A122571    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Iowa license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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54% more Medicare Part D claims than the average nurse practitioner in 2024

1,712 Medicare Part D claims for 415 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. 66 claims were for opioids.

  1. Mattie Testroet1,712
  2. Specialty average1,109

Most prescribed

  1. Anastrozole202 claims
  2. Letrozole166 claims
  3. Hydroxyurea149 claims
  4. Tamoxifen Citrate110 claims
  5. Prednisone76 claims
  6. Acyclovir53 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $226.19

8 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mattie Testroet$226.19
  2. Specialty average$791.64

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Allen Memorial Hospital CorporationWaterloo, IA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mattie Joy Testroet among 1,294 nurse practitioner records in Iowa

Mattie Joy Testroet, ARNP is one of 1,294 nurse practitioner records with a practice address in Iowa. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 44% of them.

  • NPI issued2015 · 44% of these records are older, 53% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2015 · median 2018 among the 873 with a school on file
  • Record last updated2025 · 46% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

96 nurse practitioner records list a practice address in Waterloo

They are 96 of the 1,512 NPPES records with a practice address in Waterloo, and 1,294 nurse practitioner records in Iowa.

All 1,294 in Iowa → Every provider in Waterloo → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Jane Baker, ARNPWaterloo, IA 507011184988610
  2. Barbara Burkle, ARNPWaterloo, IA 507011588618359
  3. Ruselle Debonis, ARNPWaterloo, IA 507011275511230
  4. Tracy Elliott, ARNP, MSNWaterloo, IA 507011588919351
  5. Holly Gaede, NP-C, FNP-BCWaterloo, IA 507011144416488
  6. Annette Geary, FNP-BCWaterloo, IA 507011952362683
  7. Julie Gleason, ARNPWaterloo, IA 507011164726139
  8. Carrayn Gossman, NPWaterloo, IA 507011316170178

Common questions

What is Mattie Joy Testroet, ARNP's NPI number?

Mattie Joy Testroet, ARNP's National Provider Identifier (NPI) is 1356723399, issued on Jun 26, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Mattie Joy Testroet, ARNP located?

The NPPES record lists a practice address at 3530 W 4TH St, Waterloo, IA, 50701. Phone: (319) 233-2701. Providers update this record themselves, so call before visiting.

How can I verify Mattie Joy Testroet, ARNP's license?

NPPES lists Iowa license number A122571, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.

How much does Mattie Joy Testroet, ARNP prescribe under Medicare Part D?

In 2024, Mattie Joy Testroet, ARNP had 1,712 Medicare Part D claims for 415 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.