OASIS CERTIFICATION
Get COS-C Certified
Prove your OASIS expertise with the credential trusted across home health. Lead your clinical team with confidence and accuracy.
Computer Based Exam- Initial $395 | Renewal $345
Test at a PSI center near you, on your schedule. The same open-book COS-C exam, with results reported promptly.
Paper & Pencil Exam- Initial $300 | Renewal $250
Test in person right after a live workshop, while the material is fresh. The same open-book exam in a proctored classroom.
★★★★★ 98% of certified clinicians recommend OASIS Answers
WHY GET COS-C CERTIFIED?
Turn your OASIS expertise into a recognized credential
Prove It
Show that your OASIS knowledge goes beyond familiarity. The COS-C designation validates the accuracy, judgment and confidence you bring to assessments every day.
Protect It
Support cleaner data, stronger compliance, appropriate reimbursement, and deserved quality outcomes through OASIS decisions grounded in CMS guidance.
Stand Out
COS-C signals a higher level of commitment and credibility. It distinguishes clinicians, educators, QA reviewers, and leaders who take accuracy seriously.
The COS-C Exam covers CMS guidance on:
- OASIS regulations
- Data collection time points
- Patient populations
- Data collection conventions
- OASIS item-by-item guidance
What To Expect
2.5 Hour timed test
100 multiple-choice questions
Based exclusively on CMS guidance
Open book
TRUSTED CERTIFICATION EVER SINCE
COS-C EXAM ADMINISTRATIONS – AND COUNTING
RECOMMEND
★★★★★
“It proves I’m an expert in my field and committed to excellence. I can be a confident leader to my home care clinicians.”
Katie S.
COS-C
★★★★★
“This certification opened doors I never thought imaginable. I’ve passed the COS-C exam four times.”
Jessica C.
COS-C
★★★★★
“I worked hard to earn it and recertify. It makes me better at my job and grows my OASIS knowledge every time.”
Nikki H.
COS-C
How to Take the COS-C Exam
COS-C Exam Testing Options
Take the COS-C exam after select workshops at an in-person, proctored paper-and-pencil administration, or schedule at your convenience at an authorized computer-based testing center nationwide.
Frequently asked questions
Who can take the COS-C Exam?
The exam is open to all participants. There are no prerequisites other than a desire to demonstrate your knowledge of CMS data collection guidance and commitment to OASIS data accuracy. Suggested professions: Home Health Nurses, Therapists, or other home healthcare professionals responsible for conducting comprehensive assessments, coding OASIS items, auditing clinical records, or educating and orienting staff.
How long does the COS-C Exam take?
2.5 hours, 100 multiple-choice questions. Exam results are reported as Pass or Fail. At exam check-in, candidates must present two forms of identification, one of which must be a valid government-issued ID.
What's on the COS-C Exam?
The COS-C Exam covers CMS rules and instructions on the OASIS time points, regulations, patient populations and OASIS item-specific coding. The exam is open-book; candidates are allowed to bring ANY paper-based OASIS reference materials into the examination. These materials can include, but are not limited to: CMS Core OASIS Documents, OASIS Guidance Manual, CMS OASIS Q&As, the Blueprint for OASIS Accuracy handout, and an INSTANT OASIS Answers book.
TEst with confidence
How can we help ensure you walk into the exam comfortable and set for success?
A solid resource
INSTANT OASIS Answers Book
THE CMS-based ready reference organizing CMS guidance by OASIS item, with color coding and icons to put answers at your fingertips on test day and long after.
from $75
A comprehensive refresher
Blueprint for OASIS Accuracy Workshop
The flagship 2-day, in person OASIS training and COS-C Exam prep. Includes 650+ page handout for use during workshop, COS-C testing, and beyond.
from $695
A practice test
Exam Cram
An on-demand recorded and timed practice test experience, with OASIS Answers expert presenters reviewing each question and rationale to reinforce relevant guidance.
from $299