What Is CHN Certification?

What CHN Certification Actually Means

CHN certification is a professional credential for nurses who deliver hemodialysis care to patients with end-stage renal disease (ESRD). CHN stands for Certified Hemodialysis Nurse. Passing the examination demonstrates that you have mastered the clinical knowledge, safety practices, and supervisory skills needed to care for patients receiving in-center or home-based hemodialysis treatment.

The acronym "CHN" is shared by several unrelated credentials in other fields, which causes real confusion in search results. This article covers only the hemodialysis nursing credential. If you are still sorting out terminology, our short explainers on what CHN stands for and CHN meaning clear up the naming question quickly.

Unlike a general nursing license, which establishes minimum legal competence to practice, the CHN is a voluntary specialty credential. It signals that you have gone beyond the license and been evaluated against a defined body of nephrology nursing knowledge. For a deeper look at the role itself, see what a CHN is.

Who Issues the Credential

The CHN is administered by the Board of Nephrology Examiners Nursing & Technology (BONENT). BONENT is a certifying body focused on nephrology nursing and dialysis technology, so its examinations are built around the actual work done in dialysis units rather than general nursing theory.

That focus matters for how you prepare. BONENT questions assume you understand the dialysis treatment environment from the inside: the machine, the water, the access, the patient response, and the regulatory expectations around all of it. Candidates who treat the exam as a generic nursing test tend to underestimate how technical and unit-specific it is. Our overview of how hard the CHN exam is explores that gap in detail.

Eligibility: The Routes Into the Exam

BONENT sets experience requirements before you can sit for the exam, and you must be able to document them. The standard route depends on your license type:

There is also an approved corresponding nurse-training pathway. That route requires confirmation from BONENT plus supporting documentation, so contact the board directly before assuming it applies to you.

For a full walkthrough of qualifying and what to gather, read our CHN requirements guide.

Exam Format at a Glance

Three hours for 150 questions works out to roughly 72 seconds per item on average. That is a comfortable pace for recall questions, but scenario-based questions about machine alarms, complications, or water treatment take longer to reason through. Practicing under timed conditions on our CHN practice test helps you build a sense of where your time actually goes.

BONENT does not disclose how many of the 150 questions are scored versus unscored, so treat every question as if it counts. Because the exam is closed book with no personal calculators or reference devices, you must be able to handle any dosage, flow-rate, or time-based reasoning mentally or with whatever the testing site provides.

The Four Exam Domains

The official content outline divides the exam into four domains that together total 100%. The weighting is extremely lopsided, and understanding it is the single most useful piece of planning information you have. For a domain-by-domain breakdown, see our complete guide to all four content areas.

Registration, Fees, and Testing Mechanics

Fees depend on where you live and which format you choose. BONENT does not publish separate member and non-member tiers, so the price is the same regardless of association membership.

An optional USD 100 expedite fee is available if you need faster processing. Always confirm current amounts on the BONENT webpage before paying, because the general handbook linked from the site was revised in January 2021 and its fee figures have been superseded by the current webpage. For the full financial picture, including renewal costs, see our CHN certification cost breakdown.

The computer-based option runs through a linked SMT/IQT testing network, while paper examinations are handled under approved onsite proctoring. CBT is not a verified at-home route, so plan to test at an approved location. Authorization and application deadlines apply, so check scheduling details in our guide to CHN exam dates and testing windows before you commit to a timeline.

Understanding the Scaled Passing Score

The passing standard is a scaled score of 70 on a 1-100 scale. This is not the same as answering 70% of questions correctly. Scaled scoring converts your raw performance onto a common reporting scale so that results remain comparable across different versions of the exam, and the raw-score equivalent of a scaled 70 is not something BONENT has verified publicly.

Practical consequences for you:

• Do not plan around "I only need 105 of 150 correct." That arithmetic is not supported by the published information.
• Aim for comfortable mastery of Domain 2 rather than trying to calculate a minimum safe score.
• BONENT does not publicly disclose a pass rate, so be skeptical of any site quoting one as fact. Our CHN pass rate analysis explains what can and cannot be said responsibly.

For more on how scoring is described, see CHN passing score explained.

Sequencing Your Preparation by Domain

No universal mandatory number of prep hours has been verified, so build your plan around the domain weights instead of a fixed hour count. Because Domain 2 holds 74.5% of the exam, it should consume the bulk of your calendar, with the smaller domains scheduled as shorter, focused blocks. One sample progression:

The reasoning is simple: Domain 2 topics are interconnected, so studying them in two connected phases helps you see how access problems, machine alarms, and patient symptoms relate. Environmental Control and Management are smaller but easy points once the clinical core is solid. Our CHN study guide expands on resources and pacing, and the CHN cheat sheet works well for final-week review.

Validity, Renewal, and Maintenance

The CHN credential is valid for four years. To renew through the standard route, you complete 40 contact hours, including at least 30 nephrology hours. Alternatively, you can renew by passing a qualifying examination, or through a once-in-lifetime waiver route.

Prepaying works out to USD 60 per year versus USD 65 annually, a modest saving if you are confident you will keep the credential active. Note that the 2026 renewal booklet describes renewal requirements and should not be read as a change to the exam content itself.

Who Values the Credential

The CHN is most relevant to nurses working in dialysis settings: outpatient dialysis centers, hospital-based dialysis units, and home hemodialysis programs. Employers in these settings operate in a regulated, specialty-driven environment, and certification can support credibility with leadership, surveyors, and colleagues. It can also support advancement toward charge, educator, or clinical coordinator responsibilities, where Domain 1 skills become part of daily work.

Whether the credential produces a pay difference depends on your employer, region, and role, and we avoid quoting unverified figures. For a grounded discussion, see our CHN salary guide and the ROI analysis of CHN certification. If you are exploring openings, our overview of CHN jobs describes where certified nurses tend to work.

Frequently Asked Questions

If you are ready to test your readiness against the real exam structure, start with the CHN practice test and revisit the CHN certification overview as you plan your path.