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About this exam

The CNN-NP (Certified Nephrology Nurse – Nurse Practitioner) is a nephrology specialty certification offered by the Nephrology Nursing Certification Commission (NNCC), a charter member of the American Board of Nursing Specialties. It is aimed at established nurse practitioners who already hold a nephrology practice base: NNCC describes the credential as being for nurse practitioners with at least 2,000 hours practicing in nephrology. Certification is positioned around patient safety and quality of care, and NNCC states that its exams are English-language exams intended to establish that a certified individual meets the requirements of a nationally certified healthcare professional practicing in the United States. The exam content itself is not itemized on the NNCC landing page, so candidates should consult the CNN-NP pages and the Practice/Prepare tab under the credential for the current content outline and recommended references. On preparation, NNCC explicitly warns that books and flash cards marketed as NNCC exam preparation materials are not created or endorsed by NNCC and that their use is not recommended; instead, use the reference list NNCC publishes for the credential. Special accommodations are arranged through NNCC's testing partner, C-NET, in conjunction with the ADA, and English as a second language is not treated as a disability under the ADA. This page is an independent study resource and is not affiliated with or endorsed by NNCC.

What you'll study

Common questions

About CNN-NP preparation

Who is eligible to sit for the CNN-NP exam?

NNCC describes the CNN-NP as being for established nurse practitioners with at least 2,000 hours practicing in nephrology. That practice-hour threshold is the only eligibility detail NNCC states on its main certification page, so check the CNN-NP credential pages for the complete, current application requirements before you apply.

What does the CNN-NP exam cover?

The NNCC landing page does not publish a CNN-NP content outline, so no domain breakdown or topic weighting can be quoted from it. Go to the CNN-NP section of the NNCC site and the Practice/Prepare tab under that credential, which NNCC points to for recommended reference materials and exam preparation information.

How long is the exam and how many questions are there?

NNCC does not state the CNN-NP item count or time limit on its main page, so treat any specific number you see elsewhere with caution and confirm it in the current candidate handbook for the credential. Plan your pacing practice around the official format once you have verified it.

What score do I need to pass, and what does the exam cost?

Neither the passing standard nor the CNN-NP exam fee is given on the NNCC landing page, so both should be confirmed directly with NNCC or in the current candidate materials. Do not rely on fees quoted for other NNCC credentials; NNCC prices each exam separately, and promotional pricing for one exam does not transfer to another.

Are commercial review books and flash cards worth buying?

NNCC states that books and flash cards marketed as preparation materials for its exams are not created or endorsed by NNCC and that their use is not recommended. Instead, work from the recommended reference materials listed under the Practice/Prepare tab for the CNN-NP credential, plus your own nephrology practice experience.

How hard is the CNN-NP exam?

NNCC does not publish a CNN-NP pass rate on its main page, so difficulty cannot be stated numerically. The realistic baseline is that it is a specialty exam for practicing nephrology nurse practitioners, so broad, current nephrology knowledge across chronic kidney disease, dialysis therapies, transplantation, and acute kidney injury is expected rather than entry-level recall.

Can I get extra time or other accommodations if English is my second language?

Special accommodations are offered through NNCC's testing partner, C-NET, in conjunction with the Americans with Disabilities Act. NNCC specifically notes that English as a second language is not considered by the ADA to be a disability, and that its certification exams are English-language exams. Request any ADA accommodation through C-NET in advance.

How will I be reminded before my certification expires?

NNCC offers an optional text alert service. If you sign up for NNCC mobile service, you receive your certification reminder notice by text message at least 90 days before your certification expiration date, along with other NNCC news. This is useful if mail or email has been unreliable for you.

In what order should I study?

Start with the official content outline and the recommended references listed under the Practice/Prepare tab for CNN-NP, since NNCC does not endorse third-party prep products. Then audit your own practice: identify nephrology areas you rarely encounter, build those first, and finish with timed mixed-topic practice so you can pace yourself under exam conditions.

What are the most common preparation mistakes?

Two stand out. First, relying on marketed flash cards and review books that NNCC says are not created or endorsed by it. Second, studying general advanced practice content instead of nephrology-specific material, when the credential is explicitly built around nephrology practice hours. Anchor your study plan in NNCC's own recommended references.