- How the Dipl.C.H. Blueprint Is Organized
- Foundations of Oriental Medicine: Domains 1-3
- Biomedicine: Domains 4-7
- Chinese Herbology: Domains 8-11
- Domain Weights at a Glance
- Exam Format, Scoring and Testing Conditions
- Fees and Eligibility Mechanics
- Sequencing Your Study by Domain
- Frequently Asked Questions
- The 11 domains split across three separate exams: FOM (Domains 1-3), BIO (Domains 4-7) and CH (Domains 8-11).
- Each module has its own 100% blueprint, so domain percentages never combine into one credential-wide allocation.
- The largest domains are Pathomechanisms and Pattern Differentiation (38%), Analysis and Clinical Decision-making (34%), and Treatment Planning and...
- Passing requires a scaled score of 70 on a 1-99 scale per module, not 70% correct.
How the Dipl.C.H. Blueprint Is Organized
The Diplomate in Chinese Herbology (Dipl.C.H.) credential is issued by the National Certification Board for Acupuncture and Herbal Medicine (NCBAHM), formerly known as the NCCAOM. The name changed effective January 2026, but the Chinese Herbology credential and the Dipl. C.H. designation remain. Earning it means passing three separately scheduled Pearson VUE computer-adaptive examinations: Foundations of Oriental Medicine (FOM), Biomedicine (BIO) and Chinese Herbology (CH).
The 11 content areas in the 2026 outlines are not one 11-part test. They are the formal exam objectives distributed across those three modules: Domains 1-3 belong to FOM, Domains 4-7 to BIO, and Domains 8-11 to CH. Each module carries its own 100% blueprint. The percentages inside FOM sum to 100, the percentages inside BIO sum to 100, and the percentages inside CH sum to 100. You cannot add them together or normalize them into a credential-wide weighting, and any article that tells you "Domain 2 is 38% of the whole Dipl.C.H." is misreading the structure.
Foundations of Oriental Medicine: Domains 1-3
The FOM module tests the diagnostic and strategic core of Oriental medicine. Its three domains move from gathering information, to interpreting it, to deciding what to do about it. One naming note: the current outline PDF uses the title Foundations of Oriental Medicine, even though some administrative webpages say Foundations of Herbal Medicine. The PDF wording is the one followed here.
Domain 1: Patient Assessment Methods (28%)
This domain covers how information is gathered through the traditional diagnostic methods and how reliably you interpret what you observe.
- Inquiry, inspection, palpation and listening/smelling as sources of diagnostic data
- Tongue and pulse findings and what they contribute to a clinical picture
- Recognizing which findings are significant and which are incidental
Domain 2: Pathomechanisms and Pattern Differentiation (38%)
The single heaviest domain in the FOM blueprint. Questions typically present a clinical picture and ask you to identify the underlying pattern or explain how a disease process develops.
- Applying the differentiation frameworks to a presentation and distinguishing between similar patterns
- Understanding how pathogenic factors and organ dysfunction produce signs and symptoms
- Telling apart patterns that share overlapping symptoms but differ in root and branch
Domain 3: Treatment Planning (34%)
Once a pattern is identified, this domain tests whether you can set a coherent treatment principle and strategy.
- Translating a differentiated pattern into a treatment principle
- Prioritizing when multiple patterns or complaints coexist
- Matching strategy to the presentation rather than to the disease label alone
Together, Domains 2 and 3 account for 72% of the FOM blueprint. Domain 1 is the smallest of the three but feeds everything after it, since a misread tongue or pulse propagates into a wrong pattern. Historically, FOM has been the most forgiving of the three modules for well-prepared candidates; for the data behind that statement, see our breakdown of the Dipl.C.H. pass rate.
Biomedicine: Domains 4-7
The BIO module is the one most candidates underestimate. It has four domains, and the weight sits on applied reasoning rather than memorized science.
Domain 4: Biomedical Sciences (18%)
The smallest BIO domain, covering the foundational science underpinning clinical reasoning.
- Anatomy, physiology and pathophysiology relevant to patient care
- Core concepts you need in order to interpret findings in later domains
Domain 5: Patient Evaluation (26%)
This domain focuses on gathering and interpreting biomedical information about the patient.
- History taking and review of systems
- Physical examination findings and their significance
- Recognizing when presentations call for referral or urgent attention
Domain 6: Analysis and Clinical Decision-making (34%)
The largest BIO domain. Expect scenario-based questions that require you to weigh information and choose a safe, appropriate course of action.
- Interpreting clinical and diagnostic information in context
- Deciding between treating, co-managing and referring
- Identifying red flags and drug, condition or herb-related concerns
Domain 7: Professional Responsibilities (22%)
Covers the ethical, legal and practice-management obligations of the practitioner.
- Professional conduct, boundaries and patient communication
- Documentation, confidentiality and scope-of-practice awareness
- Responsibilities when coordinating care with other providers
Chinese Herbology: Domains 8-11
The CH module is the specialty exam and the one that defines the credential. Its four domains are the most evenly spread of the three modules, which means there is no single domain you can afford to skip.
Domain 8: Chinese Herbs, Herbal Combinations and Herbal Formulas (22%)
The materia medica and formula knowledge domain.
- Individual herbs: category, properties, actions and indications
- Herb pairs and combinations, and how they change an herb's effect
- Classical and modern formulas, their composition and the logic of their structure
- Note that the appendix herb lists in the content outline are not exhaustive, so do not treat them as a complete boundary of testable material
Domain 9: Safety and Quality Control (24%)
One of the most distinctive domains in the credential, and one that carries more weight than many candidates expect.
- Contraindications, toxicity and precautions for herbs and formulas
- Herb-drug and herb-herb interactions
- Quality, sourcing and preparation considerations
- Recognizing adverse reactions and responding appropriately
Domain 10: Treatment Planning and Administration (30%)
The largest CH domain. It connects diagnosis to an actual herbal prescription and the practical handling of that prescription.
- Selecting and building a formula from a differentiated pattern
- Modifying formulas to fit the individual patient
- Dosage, forms of preparation and administration considerations
- Instructing patients on how to take and what to expect from an herbal regimen
Domain 11: Treatment Evaluation and Modification (24%)
Tests whether you can judge a treatment's effect over time and adjust accordingly.
- Assessing response to a formula and identifying what has and has not changed
- Adjusting composition, dose or strategy based on follow-up findings
- Recognizing when a presentation has shifted and a different approach is needed
CH is also the module with the lowest historical first-attempt pass rate among the three: 62.3% in 2025 for Route 1 U.S. formal-education candidates. Domains 10 and 11 together are 54% of the module, and both are applied rather than recall-based. If you only know herbs and formulas as lists, you will struggle on them. For the full numbers and their limits, see what the pass-rate data shows.
Domain Weights at a Glance
The table below lists every domain with its weight within its own module. Remember that each module sums to 100% on its own.
| Module | Domain | Weight Within Module |
|---|---|---|
| FOM | 1. Patient Assessment Methods | 28% |
| FOM | 2. Pathomechanisms and Pattern Differentiation | 38% |
| FOM | 3. Treatment Planning | 34% |
| BIO | 4. Biomedical Sciences | 18% |
| BIO | 5. Patient Evaluation | 26% |
| BIO | 6. Analysis and Clinical Decision-making | 34% |
| BIO | 7. Professional Responsibilities | 22% |
| CH | 8. Chinese Herbs, Herbal Combinations and Herbal Formulas | 22% |
| CH | 9. Safety and Quality Control | 24% |
| CH | 10. Treatment Planning and Administration | 30% |
| CH | 11. Treatment Evaluation and Modification | 24% |
A pattern worth noticing: in every module, the heaviest domains are the applied ones (pattern differentiation, clinical decision-making, treatment planning and administration). The pure-knowledge domains (Biomedical Sciences at 18%, Herbs and Formulas at 22%) are among the lightest. That does not make memorization unimportant, since you cannot reason with herbs you do not know, but it tells you where the points are.
Exam Format, Scoring and Testing Conditions
Each of the three modules is a computer-adaptive Pearson VUE examination delivered in English, with 100 multiple-choice questions and a 2-hour-30-minute time limit. Across all three required exams, that is 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.
- Scoring: each module requires a scaled score of 70 on a 1-99 scale. This is not 70% correct, so do not translate your practice-test percentages directly. Our passing score guide explains this in detail.
- No skipping, no going back: you cannot skip a question or return to a previous answer. Every question demands a committed answer before you move on.
- Closed book: personal reference materials and calculators are prohibited.
Key Takeaway
Because you cannot revisit answers, practice making a best decision on the first read. In scenario-heavy domains like Pattern Differentiation, Clinical Decision-making and Treatment Planning and Administration, train yourself to identify the single deciding detail in the stem and commit. Our practice tests are useful for building exactly this habit.
Fees and Eligibility Mechanics
Knowing the domains is only part of the picture, because you must be approved to test before you can sit for any of them. The current Applicant Fees page lists USD $550 for the CH application and $350 per examination module, paid to Pearson VUE. That works out to a calculated $1,600 for the application plus three first attempts, before education, preparation, Clean Needle Technique (CNT) and other costs. Be aware that the linked January 2024 Certification Handbook still shows older figures ($525 application and $325 per examination); the amounts above follow the current dedicated fee pages. Our certification cost breakdown covers the full picture.
In the U.S., formal-education eligibility generally requires one of two paths:
- An ACAHM-accredited or candidate four-year master's or Professional Doctorate program in acupuncture with a Chinese herbal medicine specialization; or
- An acupuncture master's or Professional Doctorate plus an approved postgraduate Chinese Herbal Certificate. The January 2024 handbook specifies at least 450 herbal didactic hours, 210 herbal clinical hours and 60 related biomedical clinical-science hours for the certificate, though the current educational-eligibility webpage lists only the first two components.
International applicants need equivalent formal education and a course-by-course transcript evaluation through International Consultants of Delaware. Before you are approved to 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.
Two more mechanics to keep in mind. First, all required examinations must be completed within the four-year application period (see exam dates and scheduling). Second, passing the exams alone does not award certification; certification is granted only after all required documents are accepted. Certification is also separate from state licensure.
Sequencing Your Study by Domain
You schedule each module separately, so you can sequence them deliberately rather than preparing for 300 questions at once. One reasonable approach is to order your study by dependency: pattern logic first, biomedical decision-making second, herbal application third, because the herbal domains build directly on the differentiation skills tested in FOM. The timeline below is one example, not a requirement.
FOM: Domains 2 and 3 first
- Spend the most time on Pathomechanisms and Pattern Differentiation (38%) and Treatment Planning (34%)
- Fold in Patient Assessment Methods (28%) as the input layer for those patterns
- Sit the FOM exam while the material is fresh, since it is the module with the strongest historical pass rate
BIO: Domains 6 and 5 first
- Prioritize Analysis and Clinical Decision-making (34%) and Patient Evaluation (26%) with scenario practice
- Review Biomedical Sciences (18%) as supporting knowledge rather than a standalone memorization project
- Cover Professional Responsibilities (22%) with focused ethics and scope-of-practice review
CH: Domains 10 and 11, with 8 and 9 woven through
- Build formulas from patterns and practice modifying them (Domain 10 at 30%, Domain 11 at 24%)
- Learn herbs and formulas in the context of their safety profiles, linking Domains 8 and 9
- Test yourself on contraindications and interactions repeatedly; Safety and Quality Control is 24% of CH
Adjust the pacing to your own background. A candidate fresh from a herbal program may compress the CH block, while a practitioner who has been out of school for years may need longer on BIO. Whatever the schedule, use domain-organized practice questions so your weak areas show up by domain rather than as a single blended score. For a wider planning framework, see our complete study guide and the one-page cheat sheet, and when you are ready to test your recall, try the Dipl.C.H. practice exams.
Frequently Asked Questions
No. They are spread across three separate exams. Domains 1-3 make up Foundations of Oriental Medicine, Domains 4-7 make up Biomedicine, and Domains 8-11 make up Chinese Herbology. Each exam is scheduled and scored on its own.
No. Each module has its own 100% blueprint, so a domain's percentage only describes its share of that one module. Combining them into a credential-wide allocation would be inaccurate.
Within their modules, the largest are Pathomechanisms and Pattern Differentiation at 38% in FOM, Analysis and Clinical Decision-making at 34% in BIO, and Treatment Planning and Administration at 30% in CH.
A scaled score of 70 on a 1-99 scale for each of the three modules. This is a scaled score, not 70% of questions answered correctly, so raw practice percentages do not map directly to it.
September 1, 2026. The outline index page may still show older 2020 links under a "Current Exam Content Outlines" heading, but the explicit September 1, 2026 effective date governs, so study from the 2026 outlines.