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

Mattie Joy Testroet, ARNP

Individual provider Nurse Practitioner · NPI 1356723399

Mattie Joy Testroet, ARNP is a Nurse Practitioner in Waterloo, Iowa. Qualified in 2015, 11 years ago. Practices with Allen Memorial Hospital Corporation, a 149-clinician group and offers telehealth. Licensed in Iowa.

Years since qualifying
11
Licensed in
IA
In the registry since
2015
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

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Practice location Address checks out

3530 W 4th St
Waterloo, IA 50701-4503
Phone: (319) 233-2701
Fax: (319) 236-7993
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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 A122571 (IA)

Record details

NPI number1356723399
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorNo
NPI enumeratedJune 26, 2015
Last updated in NPPESMay 13, 2025
Certification dateMay 13, 2025
Mailing address3530 W 4th St, Waterloo, IA 50701-4503

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Allen Memorial Hospital Corporation — 149 clinicians
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services

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