All Questions


  • Am I able to find out the results of an individual question, whether I got it right or wrong?

    No, the results of individual questions from the CNN-NP test are not reported. This is to maintain the integrity of the exam so that the content and questions are not compromised for future test takers. 

    Your "Score Report" will be available to you at the end of your examination. If you pass the exam, the report will reflect your score as well as notify you of when to expect your certificate in the mail and when your name will appear in the NNCC Certified Directory. If you were unsuccessful on the exam, the report will reflect your score and a breakdown of the test subareas (the Content Areas on the CNN-NP Test Blueprint) with the percent of questions you answered correct in each. This breakdown of subarea scores will help you determine the blueprint areas in which you need further study. 

    Credential(s): CNN-NP
  • Are there any math problems on the test?

    None of the test questions require any mathematical ability beyond basic arithmetic that would be used daily by any NP. The computers used for the exam have calculators available for use. 

    Credential(s): CNN-NP
  • How are the questions on the test created?

    Valid and reliable tests do not arise spontaneously from item writers. They are carefully planned to ensure that they are legally defensible and psychometrically sound. The blueprint, or test plan, identifies what content is included on the test and what majority of the questions are need to address for each type of nephrology patient clients and the activities performed by the NP.

    The blueprint is a result of a practice analysis survey of NPs in nephrology that identifies the clients we serve and activities performed by NPs. This practice analysis is performed every five years to be sure the test reflects current practice.  A national task force of CNN-NPs is brought together to plan the survey content. Following data collection, the survey results are reviewed and adjustments are made to the blueprint to ensure that the questions are properly distributed along the continuum of care based on current practice. Each question on the test can be linked directly to the tasks/activities in the practice analysis survey and all answers are supported, using the most recent edition of the ANNA Core Curriculum for Nephrology Nursing and other current references.

    The group that oversees CNN-NP test development is the Advanced Practice Board of NNCC, which is made up of CNN-NPs with expertise in different areas of nephrology. There is also a CNN-NP Test Committee that writes the actual test questions. Item writers are CNN-NPs from a variety of geographic and practice settings. Members of both the Advanced Practice Board and the Item Writers are considered “content experts” concerning the knowledge and skills needed by NPs in nephrology. The Test Committee meets in person twice a year to review, evaluate, and write test questions to be certain that the test content is accurate.

    Credential(s): CNN-NP
  • How will I benefit from obtaining the CCHT-A certification credential?

    The CCHT-A shows that you are working at an advanced level of practice and have proven your knowledge and skills by passing the CCHT-A examination. The biggest benefit of this credential may be personal satisfaction. There may be benefits offered by your employer for earning this credential, this would need to be discussed with your employer.


    Credential(s): CCHT-A
  • I received an incomplete application letter. Who can I contact regarding this letter?

    CCHT examination applications are mailed directly to C-NET for processing and review. If you have received an incomplete letter and have questions, please contact C-NET directly at 800-463-0786 or

    Credential(s): CCHT
  • I submitted my CCHT examination application and have not heard back, how can I check the status of the application?

    CCHT examination applications are mailed directly to NNCCs testing partner, C-NET.  It can take up to 4 weeks from the date the application is received before you receive a permit, pending approval.  If it has been more than 4 weeks since the application was sent, please contact C-NET directly at 800-463-0786 or
    Please note:  If FastTrack services were requested, the permit should be issued within 1-3 business days.

    Credential(s): CCHT
  • If I do not pass the test how soon can I take it again? How many times can I take it if I fail?

    If you are unsuccessful on the exam, you have one opportunity within one year to retake the examination at a reduced rate. C-NET will mail a re-examination application to those applicants who do not pass.

    Credential(s): CNN-NP
  • Is there a review course for the test?

    Although there is not an actual review course several options exist. Look under Practice/Prepare tab to download the free Certification Preparation Guide which offers sample test questions with answers and the option to pay to take the Online Practice Exam.

    A "Nurse Practitioner Exam Review" was offered as an NKF Preconference option April 10, 2018. It included test construction, item review and audience response with exam question review and rationale. A similar presentation was given at ANNA's 2014 Fall Meeting (available via ANNA ProLibraries).

    These options have been prepared by CNN-NPs and approved by NNCC's Advanced Practice Exam Board. 

    Online one can find "review courses" for nephrology NP’s preparing to take the CNN-NP. They are; however, put out by generic test review companies that have no connection with NNCC and we cannot recommend any of them as a preparation for this test.

    Credential(s): CNN-NP
  • Is this certification accepted by any State Boards of Nursing or other nursing organizations for continuing education (CEU) credit? Is it accepted to as being the only certification I will need for my state to be licensed as an NP?

    To the best of our knowledge the CNN-NP exam is not accepted as a source of CEU credit by any State Board of Nursing or other nursing organizations.  It is not accepted by any states as being the only certification required to practice.

    Credential(s): CNN-NP
  • Is this considered a board accredited exam program?

    Not now, although the Nephrology Nursing Certification Commission (NNCC) board and the CNN-NP board are actively pursuing having this test being recognized and approved for national board certification by the Accreditation Board for Specialty Nursing Certification (ABSNC). 

    Credential(s): CNN-NP
  • We all know that reality is such that what you learn in books isn’t what you see in actual practice settings. Is the test based on "book-smart" or "street-smart" information?

    The preparation of the test is purposefully designed to be legally defensible and psychometrically sound. The test is kept up-to-date by the CNN-NP item writers to make sure every question is pertinent and current to today’s clinical practice. 

    Credential(s): CNN-NP
  • What are the range of scores typically seen? How many people pass/fail?

    The passing score of the test is determined by a panel of CNN-NPs who serve as subject matter experts (SMEs). Both experienced and newly certified NPs serve on this panel. This group performs a standard setting procedure (Angoff) in which each test question is reviewed to determine its level of difficulty.  The passing score is based on the level of difficulty of the questions and what number of questions need to be answered correctly to identify individuals who have an acceptable level of knowledge and skill. Therefore, each candidate’s test score is measured against a predetermined standard, not against the performance of other test takers. Currently a score of 70% correct is required to pass the CNN-NP examination, with about 75% of people taking the test passing the first time.

    Credential(s): CNN-NP
  • What can I do if I don’t agree with the options provided for the answers?

    The CNN-NP exam is formatted as a multiple-choice test so that there is only one correct answer out of four choices. If you disagree with any specific question or part of the exam you are free to contact NNCC directly after the exam and someone from the CNN-NP board will help answer your concern. 

    Credential(s): CNN-NP
  • What impact will becoming a Certified Nephrology Nurse-Nurse Practitioner have on my being an NP?

    The number one reason to become certified is to help ensure patient safety. For the NP who is driven to be certified it is often to fulfill a personal need to be professionally recognized as having obtained a higher level of excellence in their practice.  Putting "CNN-NP" next to your name shows your colleagues that you have the advanced knowledge and competence as a nephrology NP and you provide an excellence of care that is the desired by our standards of practice. 

    Some other benefits of becoming certified can depend in part on the support the NP gets from the practice they are employed by.  Many practices pay for the certification exam, provide extra benefits or financial incentives and acknowledge the clinical excellence you can bring to their practice. 

    Credential(s): CNN-NP
  • What is the best way for me to study for the test, especially if I work most of my time in a community dialysis center?

    First, review the test blueprint to understand the breakdown of the test as to what areas are emphasized. The blueprint lists the ideal distribution of questions and the number of questions that are included for each client problem and activity associated to it. Questions on the kidney replacement therapies are much of the questions on the test (56-59% currently) but examining a broad overview of nephrology nursing is important. Only you know your strengths and weakness and concentrating on the areas that you feel you are weak helps prepare you to feel more confident. 

    Taking the practice questions at the end of the Certification Preparation Guide or the online CNN-NP Practice Test can be helpful.

    You can also consult the list of references, list in the CNN-NP exam information in Certify as well as in the Resources section. This includes ANNA’s Core Curriculum for Nephrology Nursing, Daugirdas’ Handbook of Dialysis, and other prominent nephrology journals and textbooks. 

    Credential(s): CNN-NP
  • What is the difference between the CCHT and the CCHT-A?

    The CCHT-A is an advanced credential for technicians that are working in an advanced dialysis technician level of practice, ie. precepting new technicians, for a minimum of 5 years and 5000 hours.  The CCHT is an entry level certification credential.

    Credential(s): CCHT-A, CCHT


  • Does authoring an article in a peer review journal count toward recertification?


    Anyone who has published will assure you that there is a significant amount of learning involved in writing and polishing content. In recognition, 15 contact hours will be awarded toward recertification for a book chapter, manuscript, article or paper that is relevant to nephrology nursing and published by a recognized publishing house or professional journal.

    Credential(s): CNN-NP, CNN, CDN, CD-LPN, CD-LVN
  • How can I find out when my certification will expire?

    Your certification expiration date is shown on your certification wallet card, and can also be verified through the NNCC Certified Directory.

    Credential(s): CCHT
  • How do I find continuing education?

    Continuing education can be found online, through nephrology organizations, or by attending a local or national conference.  NNCC staff members would be happy to help you in locating programs that will meet your requirements for recertification. Please contact the National Office to request information regarding continuing education, if needed.

    Credential(s): CCHT
  • I am CCHT certified. Can I recertify as a CCHT-A?

    No. The CCHT-A credential can only be obtained by taking and passing the CCHT-A certification examination.

    Credential(s): CCHT-A, CCHT
  • I am not currently employed. Do I need an employer to verify work hours during my certification period?

    Yes, a current, or previous supervisor will need to verify 3000 hours of dialysis technician work experience during your 3-year certification period.  If you did not work 3000 hours as a dialysis technician during your certification period, you are not eligible for recertification.

    Credential(s): CCHT
  • What if I can't find my certificates for continuing education completed during my certification period?

    The provider of the continuing education program should be able to provide you with a duplicate certificate of completion.  You will need copies of your certificates of completion for all continuing education programs reported on your recertification application.  A copy of a certificate or certificates may be requested upon review of your application and must be provided upon request.  If you are not able to obtain copies of the certificates of completion, it is recommended that you do not report these programs on your recertification application.  Providing information that can not be supported with documentation could cause your certification to be denied. 

    Credential(s): CCHT
  • What if I did not work 3000 hours as a dialysis technician during my 3-year certification period?

    If you have worked as a dialysis technician within the last 18 months, you may be eligible to apply to take the exam to become certified again by using the initial CCHT examination application. If it has been more than 18 months since you last worked as a dialysis technician, you will be considered a new technician and will be required to go through re-training before being eligible to apply to take the CCHT examination. 

    Credential(s): CCHT
  • What if my certification has already expired? Can I complete continuing education now to be recertified by continuing education?

    All eligibility criteria for recertification must be met by your certification expiration date. If you have worked 3000 hours during your certification period as a dialysis technician, but did notcomplete 30 hours of nephrology continuing education credits within the dialysis technician's scope of practice by your certification expiration date, you will need to Recertify by Examination.

    Credential(s): CCHT
  • What is my registration number?

    NNCC is your national certification board. NNCC does not issue numbers with your certification. There are some states that require a state registration or certification, and those states may issue a registration or certification number. NNCC will ask for the registration number, if applicable. If you do not have a state registration or certification number, you will leave this question blank on your recertification application.

    Credential(s): CCHT


  • Which of the following over-the-counter medications can result in loss of residual kidney function?

    Ranitidine (Zantac)
    Naproxen (Aleve)
    Loratadine (Claritin)
    Guaifenesin (Mucinex)

    Answer: Naproxen

    ReferenceContemporary Nephrology Nursing (3rd Edition), 2017American Nephrology Nurses Association, pp. 296-297.

    Credential(s): CNN-NP, CNN, CDN, CD-LPN, CD-LVN