Dipl.C.H. Pass Rate 2026: What the Data Shows

What the Official Numbers Actually Are

If you are searching for a single Diplomate in Chinese Herbology (Dipl.C.H.) pass rate, you will not find one, and that is the first thing worth understanding. The credential, issued by the National Certification Board for Acupuncture and Herbal Medicine (NCBAHM, formerly NCCAOM), is earned through three separately scheduled computer-adaptive board examinations: Foundations of Oriental Medicine (FOM), Biomedicine (BIO), and Chinese Herbology (CH). Pass rates are reported per module, not for the credential as a whole.

The official figures in the 2026 Candidate Preparation Handbook cover 2025 first-attempt results for Route 1 candidates, meaning U.S. formal-education graduates. Anyone quoting a blended "Dipl.C.H. pass rate" is either averaging modules (which is statistically meaningless here, since the cohorts differ) or borrowing figures from somewhere else. For a plain-language overview of the credential itself, see What Is Dipl.C.H.? and Dipl.C.H. Certification.

Reading the 2025 Rates Module by Module

Here are the official 2025 first-attempt pass rates for Route 1 U.S. formal-education candidates:

Three observations stand out. First, FOM is the gentlest gate by a wide margin: more than nine in ten first-time Route 1 candidates cleared it. Second, BIO and CH sit roughly 24 to 30 points below FOM, which means a meaningful share of otherwise-qualified graduates miss on the first try. Third, CH is the lowest of the three, and it is the module that most directly determines whether you can be called a Diplomate in Chinese Herbology.

For a candid look at what makes these modules hard in practice, pair this article with How Hard Is the Dipl.C.H. Exam?

Why Chinese Herbology Trails Foundations

The data does not explain causation, so treat the following as informed interpretation based on the exam structure rather than a published finding. The CH blueprint rewards application, not recall. Look at the weights: Treatment Planning and Administration is the largest CH domain at 30%, and Treatment Evaluation and Modification and Safety and Quality Control each carry 24%. Only Chinese Herbs, Herbal Combinations and Herbal Formulas (22%) leans toward content knowledge in the traditional sense, and even that domain is tested through clinical-style questions.

Memorizing herb properties is necessary but not sufficient. The handbook notes that the CH appendix herb lists are not exhaustive, so a candidate who only drills the listed herbs can still be surprised. For the domain-by-domain picture, see Dipl.C.H. Exam Domains: Complete Guide to All 11 Content Areas.

Cohort Caveats: What the Rates Cannot Tell You

Responsible use of a pass rate means knowing what it excludes. Several limits apply to the 2025 figures.

1. Route 1 only. The rates describe candidates from ACAHM-accredited (or candidate) four-year master's or Professional Doctorate programs in acupuncture with Chinese herbal medicine specialization, or an acupuncture degree plus an approved postgraduate Chinese Herbal Certificate pathway as reported in the handbook. They do not describe international applicants or any other group.
2. First attempts only. Retakers are not in these numbers, so you cannot infer how many people eventually pass.
3. Separate cohorts. The FOM, BIO, and CH groups are different test-takers sitting different exams. Multiplying 92.2% by 68.7% by 62.3% would produce a number with no valid meaning.
4. Prior outline. The 2026 content outlines took effect September 1, 2026. The 2025 results reflect the earlier blueprint, so they are a reference point, not a forecast.

How Format and Scoring Shape Outcomes

Pass rates are partly a product of how the exam is delivered. Each of the three modules is a Pearson VUE computer-adaptive test in English: 100 multiple-choice questions with a 2-hour-30-minute limit. Across the credential that adds up to 300 questions and 7 hours 30 minutes, taken in separate appointments scheduled year-round. Each exam mixes scored questions with unscored pretest questions, and you cannot tell which is which.

Three testing conditions matter for behavior under pressure:

• No skipping and no going back. You cannot skip a question or return to a previous answer, so each response is final. Guessing strategy and time discipline matter more than on a linear test.
• Closed-book. Personal reference materials and calculators are prohibited.
• Scaled scoring. The passing standard is a scaled score of 70 on a 1-99 scale. That is not 70% correct.

The scaled-score point is the most commonly misunderstood. A candidate who assumes "I need 70 right out of 100" is working from the wrong model. For the mechanics, read Dipl.C.H. Passing Score: Exactly What You Need to Pass.

Where the Points Are: 2026 Domain Weights

The 2026 outlines, effective September 1, 2026, define eleven domains across the three exams. Each module has its own 100% blueprint, so these percentages describe weight within a module, not across the whole credential. Domains 1-3 belong to FOM, Domains 4-7 to BIO, and Domains 8-11 to CH.

The largest single domains per module are FOM Pathomechanisms and Pattern Differentiation (38%), BIO Analysis and Clinical Decision-making (34%), and CH Treatment Planning and Administration (30%). If you want your preparation to track where the points actually sit, start there. Notice the pattern: in all three modules, the heaviest domain is a reasoning domain, not a pure-memory one. That alignment is consistent with the lower pass rates in the two modules (BIO and CH) where candidates must apply knowledge in clinical decision scenarios.

See the full breakdown in Dipl.C.H. Exam Domains 2026.

The Cost of a Failed Attempt

A pass rate is also a financial statement. The current Applicant Fees page lists $550 for the CH application and $350 per examination module paid to Pearson VUE. That is a calculated $1,600 for the application plus three first attempts, before education, preparation, Clean Needle Technique (CNT), and other costs.

When you view the rates through that lens, a module with a 62.3% first-attempt rate implies that a sizable share of candidates face a second $350 fee for that module. The math is simple but sobering: a retake does not just cost money, it also consumes time inside a limited window.

Required examinations must be completed within the four-year application period, so retakes are bounded by that clock. For the complete money picture, see Dipl.C.H. Certification Cost: Complete Pricing Breakdown.

Pass Rates Start Before the Exam: Eligibility

The 2025 rates describe candidates who already cleared eligibility, which is itself a filter. Before you can test, an official graduation transcript and an approved CCAHM CNT certificate must be submitted directly by the respective institutions. CNT generally must be completed within six years of the application, with handbook provisions for previously completed CNT and continuous licensure.

The educational standard for the certificate pathway, per the January 2024 handbook, is at least 450 herbal didactic hours, 210 herbal clinical hours, and 60 related biomedical clinical-science hours (the current eligibility webpage lists the first two components). International applicants need equivalent formal education and a course-by-course transcript evaluation through International Consultants of Delaware.

Two more distinctions matter. Passing the examinations alone does not award certification; certification is granted only after all required documents are accepted. And certification is separate from state licensure. Full requirements are in Dipl.C.H. Requirements: Eligibility, Prerequisites & How to Qualify.

Sequencing the Three Modules Using the Data

This is the one place where study planning belongs, and it should follow directly from the numbers. Because the modules are scheduled separately and year-round, you control the order. The data suggests a rational approach: use the module with the highest pass rate to build momentum and test-day familiarity, and protect your preparation time for the two modules with lower first-attempt rates.

Because CH has the lowest historical first-attempt rate, it deserves the longest preparation window and the freshest mind, but there is no rule against taking it earlier if your coursework is recent. Your own transcript strengths should override any default order. For a fuller preparation framework, see the Dipl.C.H. Study Guide: How to Pass on Your First Attempt, and to test your readiness under realistic conditions, try the Dipl.C.H. practice tests.

Looking Ahead: What to Expect From 2026 Data

Expect updated rates to reflect the new outlines eventually, but do not assume direction. The 2026 outlines effective September 1, 2026 are based on the 2024 Job Analysis, and a changed blueprint can shift difficulty in either direction. Until NCBAHM publishes results under the new outline, the 2025 figures remain the best official benchmark, with every caveat above attached. Also note the issuer's name change from NCCAOM to NCBAHM, effective January 2026; the Chinese Herbology credential and the Dipl. C.H. designation remain unchanged.

Looking beyond the exam, certification must be renewed every four years with 60 PDA/CEU points, including at least 22 accepted core-subject points, 2 Safety, 2 Ethics, and 4 CPR points within the 60. Up to 30 points may be approved Professional Enhancement activities, or all 60 may be core. The current active-renewal fee is $350. If you are weighing whether the investment pays off, see Is the Dipl.C.H. Certification Worth It?

Frequently Asked Questions

For testing windows and scheduling, see Dipl.C.H. Exam Dates: Testing Windows, Deadlines & Scheduling, and for a quick fact review before test day, use the Dipl.C.H. Cheat Sheet.