Headmaster is approved by the Iowa Department of Inspections, Appeals, and Licensing to provide Certified Nurse Aide knowledge exam testing services for the Iowa health care community.
Refer to the Iowa Nurse Aide Candidate Handbook for guidance on navigating TMU, on-site and remote testing requirements, policies, and preparation resources.
Sign in to apply, schedule, and manage your Iowa nurse aide knowledge exam.
Effective February 2026. Download to your device before test day.
Start in Iowa TMU to complete your account, submit a testing request, schedule your knowledge exam, and review exam instructions.
Complete this application if you have finished an approved training program or are eligible to challenge the Nurse Aide Competency Exam.
Instructions if you are taking a remotely proctored knowledge exam.
What to expect for an on-site knowledge exam.
TMU candidate guide for signing in and recovering your account.
Finish setting up your TMU candidate account.
Schedule or change an Iowa nurse aide test event in TMU.
Request testing accommodations.
Request a refund of testing fees that have already been paid.
Request a review of your exam results.
Request an exception related to a no-show.
Request a demographic change or correction.
Test Administration Services Entities and Knowledge Test Proctors support Iowa nurse aide knowledge testing. Use the Iowa TASE agreement and shared Attachment A forms to get started.
Apply online to become a Test Administration Services Entity.
Iowa Testing Administration Services Agreement referenced in the TASE application.
Apply online for the Knowledge Test Proctor agreement.
Authorization for direct deposit.
Request for Taxpayer Identification Number and Certification.
Attachment A standards and shared onboarding forms for business entities.
D&S Diversified Technologies / Headmaster
PO Box 6609
Helena, MT 59604
Testing / registry toll-free: 888-401-0462
Fax: 406-442-3357
Email: iowa@hdmaster.com