What Is A CSG?

What a CSG Actually Is

If you have landed here asking "what is a CSG," the answer on this site is specific: a CSG is a Certified Specialist in Gerontological Nutrition. CDR also describes the credential as Board Certified Specialist in Gerontological Nutrition. It is a specialist designation for registered dietitians who work with older adults, and it sits on top of the RD credential rather than replacing it.

The acronym "CSG" is used by other unrelated credentials in other industries. Nothing in this article applies to those. Everything below concerns the gerontological nutrition specialist examination administered through CDR. If you want the shorter definitional versions of this topic, see our pages on what CSG stands for and CSG meaning, or the broader overview of CSG certification.

Who Issues the Credential and What It Signals

The Commission on Dietetic Registration is the credentialing arm that also governs the RD credential. That matters because the CSG inherits the RD pathway's structure: verified practice experience, a proctored computer-based exam, and a defined renewal cycle. For employers, the credential signals two things at once: that you hold active RD status, and that you have passed a standardized assessment of competence in older-adult nutrition care beyond the baseline RD exam.

A small but useful detail for candidates reading source documents: the examination content outline still carries PSI branding, while the current CDR Specialist Certification Candidate Handbook for 2026-2027 identifies Pearson as the testing provider. For anything about testing logistics and exam-day policy, treat the current handbook as the authority and the content outline as the authority on what is tested.

Who Can Sit for It

Eligibility is two-part, and both parts must be satisfied by the examination date and application window:

1. Current Registered Dietitian status with CDR, held for at least two years by the examination date.
2. 2,000 verified hours of gerontological-nutrition specialty practice as an RD during the five years preceding your application.

CDR allows approved education or professional substitutions to cover up to 800 of those hours. That is a meaningful accommodation for dietitians whose roles were only partly focused on older adults, but the substitutions must be approved, so confirm what qualifies before assuming your coursework counts. Our CSG requirements guide walks through documenting hours and common application pitfalls.

What the Exam Looks Like

The examination is a computer-based, closed-book test with a fixed structure:

Two format details shape strategy. First, because you cannot skip ahead, you cannot bank hard questions for later; you commit to an answer and move on. Second, the timer keeps running during ordinary unscheduled breaks, so a bathroom trip costs you exam time. At three hours for 150 questions, you have roughly 72 seconds per item on average, which is workable for knowledge questions but tight for lengthy case-based stems. For a candid look at how this feels, read how hard the CSG exam is.

The "one best answer" wording is important. Several options may be partially correct for an older adult with complex needs; the task is to pick the most appropriate one for the scenario given. Practicing that discrimination is the single most exam-specific skill, and the questions on our practice test site are built around that style.

The Three Exam Domains in Practice

The CDR content outline organizes the exam into three official domains. The outline allocates scored items to each, expressed as item counts rather than published percentage weights, so we present counts and do not convert them into percentages.

Assessment and Interventions together account for most of the scored items, so they deserve most of your time, but the foodservice domain is where candidates from purely clinical backgrounds can lose avoidable points. A fuller walkthrough is in our CSG exam domains guide.

Scheduling, Fee, and Test-Day Rules

The exam is delivered at Pearson VUE test centers, which offer computer-based testing year-round. That is a practical advantage: rather than waiting for a single national testing day, you schedule an appointment within your authorization period at a time that suits your preparation. The examination fee is USD $350, paid at the time you schedule. For a complete cost picture, see our CSG certification cost breakdown, and for windows and deadlines, the CSG exam dates guide.

If you do not pass, retesting normally requires reauthorization and a 60-day wait. Build that gap into your planning: a failed attempt costs both the fee and at least two months, so scheduling when you are consistently performing well on practice material is better than scheduling early to create pressure.

What the Published Results Show

CDR publishes pass/fail statistics for the credential. For January through June 2026, CDR reports:

• Overall passing: 90%, which is 64 of 71 examinees
• First-time passing: 87%, which is 41 of 47 first-time examinees

CDR's table also includes a recertification row pairing 96% with 21 of 22 examinees. Those two figures do not reconcile arithmetically as published, and we are not adjusting either one; if the recertification number matters to you, check the CDR statistics page directly.

Two cautions when reading these numbers. The sample sizes are small, so a handful of candidates moves the percentages noticeably. And candidates are already a self-selected group: you must be an RD with 2,000 specialty hours before you are allowed to test. A high pass rate reflects that screening as much as the exam's difficulty. Passing is also not a fixed percentage of candidates. It is set through Angoff standard setting with statistical equating to account for differences in form difficulty, and CDR does not supply a raw passing percentage. Our pages on the CSG pass rate and CSG passing score go deeper on how to interpret this.

Where a CSG Fits in the Workforce

Because the credential is built on gerontological specialty practice, the settings where it carries weight are those that serve older adults. Typical environments include:

• Long-term care and skilled nursing facilities, where nutrition assessment and foodservice oversight are daily realities
• Assisted living and continuing care retirement communities, which blend clinical care with dining operations
• Hospitals and health systems with geriatric units or older-adult-focused services
• Home health, hospice, and community programs serving older adults, including senior meal and nutrition programs
• Consulting, education, and program leadership roles built on specialty expertise

The three exam domains mirror these roles. Assessment and intervention map to clinical dietetics, while the foodservice domain reflects how much older-adult nutrition care is delivered through institutional dining. Whether the credential changes your pay or your options depends on your employer and market, and we avoid quoting figures we cannot support; our salary guide, ROI analysis, and CSG jobs overview discuss the considerations qualitatively.

Five Years Later: How Renewal Works

Certification is valid for five years. The renewal pathway is unusual compared with many credentials, and candidates are often surprised by it. To recertify you must:

1. Maintain current RD status
2. Submit a new eligibility application, including the applicable specialty-practice hours
3. Pay the examination fee
4. Pass another specialist examination

Continuing education alone does not renew the CSG. In practical terms, this means your specialty work during the certification cycle needs to be documentable, and you should expect to prepare for the exam again. Keep your hour records current from day one.

Sequencing Your Preparation Around the Domains

You do not need an elaborate method. What matters is matching your calendar to the exam's item allocation and to your own gaps. A reasonable sequence for a candidate with a clinical background:

Use CDR's own reference list for the exam as your reading backbone; it is a reading list, not a replacement for the content outline, so anchor your study to the outline's three domains. Then test yourself with timed questions on the practice exam. For a fuller plan, see the CSG study guide, the CSG cheat sheet, and our notes on CSG training options.

Frequently Asked Questions