CHN Study Guide 2026: How to Pass on Your First Attempt

What You Are Actually Studying For

The Certified Hemodialysis Nurse credential is issued through the Board of Nephrology Examiners Nursing & Technology (BONENT). It exists to verify that a nurse working in dialysis can safely deliver hemodialysis care, manage the technical and clinical complexity around it, and function within the regulated environment of an ESRD facility. If you want the broader background before diving into preparation, our explainers on what CHN certification is and what CHN stands for cover the basics.

This guide is about passing on the first attempt. That means understanding the exam's actual structure, weighting your preparation toward the content that dominates the test, and avoiding the administrative mistakes that delay candidates before they ever sit for a question. If you want to test yourself as you read, our CHN practice test is a good companion to this guide.

Exam Mechanics: Format, Scoring, and Rules

The Format at a Glance

The exam consists of 150 multiple-choice questions to be completed in 3 hours. That works out to roughly 72 seconds per question if you used every minute on the questions alone, which is comfortable for most candidates but not generous enough to dwell on any single item. BONENT does not publish how the 150 questions divide between scored and unscored items, so you should treat every question as though it counts.

What a Scaled Score of 70 Really Means

Candidates often hear "70 to pass" and assume they must answer 70% of questions correctly. That is not a verified interpretation. The passing standard is a scaled score of 70 on a 1-100 scale, and the relationship between raw correct answers and the scaled result is not published. Because the scored versus unscored split is also undisclosed, you cannot reliably back-calculate a target number of correct answers. The safest strategy is to aim for mastery of the content rather than to chase a minimum raw score. For a deeper treatment, see our article on the CHN passing score.

BONENT also does not publicly disclose a pass rate, so be cautious of any source quoting a specific figure. Our CHN pass rate analysis explains what can and cannot be said about outcomes, and how hard the CHN exam is discusses difficulty in qualitative terms.

Eligibility, Fees, and Registration Mechanics

Before you study a single page, confirm you can actually sit for the exam. The standard route requires an eligible nursing license and verified nephrology experience tied to active ESRD work:

• RN pathway: an eligible RN license plus one year of nephrology experience.
• LPN/LVN pathway: an eligible LPN/LVN license plus two years of nephrology experience.
• Both pathways: active ESRD work and two signed references.
• Alternative route: an approved corresponding nurse-training pathway also exists, but it requires BONENT confirmation and supporting documentation.

Our CHN requirements guide walks through eligibility in more detail, and you should always verify current criteria directly with BONENT before applying.

Fees You Should Budget For

BONENT does not publish separate member and non-member pricing tiers. An optional expedite fee of USD 100 is available if your timeline is tight. Remember that the linked general handbook is dated January 2021 and its fee schedule has been superseded by the current BONENT webpage, so always trust the live webpage over older PDFs. See our CHN certification cost breakdown for the full financial picture, including maintenance fees.

Deadlines and Authorization

Authorization and application deadlines apply, so registration is not something to leave until the week you feel ready. Plan backward from your intended test date and consult our CHN exam dates and scheduling guide to line up your application, documentation, and testing window.

The Four Domains and Where Your Time Should Go

The official content outline organizes the exam into four domains whose weights total 100%. Study time should roughly mirror these weights, though weaker areas deserve extra attention.

One naming quirk: the official PDF labels Domain 1 "Supervision/Management," while the BONENT website overview calls it "Supervision/Administration." They refer to the same domain, so do not be thrown if you see either label in different materials. Also note that the detailed exam outline is undated, so confirm with BONENT that you are working from the current version. Our full CHN exam domains guide expands on every content area.

Inside Domain 2: Dialysis and Related Issues

At 74.5%, this domain is the exam. It covers the hands-on and clinical knowledge that a hemodialysis nurse uses every shift. Rather than memorizing isolated facts, build integrated understanding of how the patient, the machine, the access, and the treatment prescription interact.

Why Calculations Deserve Early Attention

Because the exam is closed book and personal calculators or reference devices are not permitted under the linked handbook, you should be comfortable with dialysis-related arithmetic you may need to perform without outside help. Practice working through fluid removal and rate-style problems by hand until the steps are automatic. Confirm the exact rules on any on-screen tools with BONENT, since you should not assume a calculator will be supplied.

Mastering the Three Smaller Domains

The three remaining domains together account for 25.5% of the exam. They are smaller, but they are also the areas where candidates with strong bedside skills sometimes lose points because they never studied them deliberately.

Do not neglect these just because they are smaller. Together they represent a quarter of the exam, and they tend to be the more learnable portion if you are willing to read policy and standards material you may not use daily.

How to Handle CHN Question Style

Every question is multiple choice, but the cognitive demand varies. Some items test straightforward recall of a value or definition. Many, especially in the dialysis domain, present a clinical situation and ask what the nurse should do first, what is most likely occurring, or which action is most appropriate.

• Read the stem for the actual ask. "First," "best," and "most likely" change which answer is correct among several plausible options.
• Anchor on patient safety. When two answers both seem reasonable, the one that addresses immediate risk to the patient usually wins.
• Separate machine problems from patient problems. Know when to address the patient first and troubleshoot the equipment second.
• Watch for scope-of-practice traps in the supervision domain, where the question is who should perform a task, not just how.
• Do not import assumptions from other facilities. Answer according to accepted standards of nephrology nursing practice, not just your unit's habits.

For a quick reference of high-yield facts to revisit near the end of your prep, our CHN cheat sheet condenses the must-know material.

A Domain-Weighted Study Sequence

No universal mandatory number of preparation hours has been verified for this exam, so build your plan around your own baseline and timeline rather than a fixed total. A nurse with years of daily hemodialysis experience will need a different plan than one who recently moved into nephrology. The sequence below shows how to allocate effort by domain, and you can stretch or compress it as needed.

The logic is simple: Domain 2 gets the earliest and longest block because it dominates the score, while the smaller domains are slotted in once the core is stable. If your career already immerses you in infection control or supervision, shorten those weeks and give the time back to dialysis content. For a fuller view of what training looks like, see our overview of CHN training.

Test Day, Accommodations, and Closed-Book Rules

The exam is closed book. Under the linked handbook, personal calculators and reference devices are not allowed, so plan to bring nothing you cannot use. Delivery is computer-based through the linked SMT/IQT network or on paper under approved onsite proctoring. The computer-based option should not be treated as a verified at-home route; confirm testing location details directly with BONENT rather than assuming you can test remotely.

• Confirm your authorization and testing window well before your date.
• Request accommodations early if you need them; accommodations are available but require advance arrangement.
• Pace yourself: aim to move steadily through the 150 questions, flagging time-consuming items and returning to them.
• Do not leave answers blank unless the rules you receive from BONENT say otherwise; make your best selection and move on.

After You Pass: Validity, Renewal, and Career Use

Certification is valid for four years. Standard renewal requires 40 contact hours, including at least 30 nephrology hours, or you may qualify through an examination route or a once-in-lifetime waiver route. Maintenance costs USD 65 annually or USD 240 prepaid for four years. Note that the 2026 renewal booklet is a renewal document, not an indication that the exam content itself has been updated.

Many candidates pursue the credential to strengthen their standing with dialysis providers and facility employers. If you are weighing the investment, our CHN certification ROI analysis, salary guide, and CHN jobs overview lay out the career picture without relying on invented figures.

Frequently Asked Questions

Passing on the first attempt comes down to three things: confirming eligibility early, weighting your preparation toward Dialysis and Related Issues, and rehearsing under the same closed-book, timed conditions you will face on test day. Pair this guide with consistent practice and you will walk into the exam knowing exactly what to expect.