# California RDH Law & Ethics Exam Area 1A: Informed Consent and Patient Rights What Area 1A of the California RDH Law and Ethics exam tests: informed consent, capacity, minors, refusal and patient rights, with the traps. Area 1A · 20% of the California RDH Law & Ethics exam. Last updated 2026-09-24. Area 1A, Informed Consent and Patient's Rights Regarding Treatment Decisions, accounts for 20% of the 2025 outline (the exam has 60 questions, 50 scored, in 90 minutes). Because it is tied for the largest single subarea on the blueprint, mastering these rules is a priority. This area tests the legal and ethical boundaries of the chairside conversation: what you must disclose, whose authorization counts, how to handle a patient's refusal, and the specific rules for treating minors. ## At a glance | Detail | What the sources establish | | :--- | :--- | | **Exam weight** | 20% of the 2025 outline (the exam has 60 questions, 50 scored, in 90 minutes), making it a primary focus for your study time. [^B1] | | **The disclosure standard** | California measures informed consent by what a reasonable patient needs to know, not by what providers customarily say. [^A67] | | **The scope boundary** | Dental hygienists explain hygiene care but may not diagnose or comprehensively treatment plan. [^A8] | | **The minor consent ladder** | Parents consent by default; relative caregivers with an affidavit and self-sufficient minors aged 15 or older have specific statutory paths. [^A65] [^A66] | | **The sequence of care** | For interim therapeutic restorations, the dentist's diagnosis, treatment plan and instruction must come before the hygienist places the ITR. [^A11] [^A53] | ## What the exam expects you to know ### T1 — Disclosing treatment options Before a patient can make a legally effective decision about their care, they must understand the available choices. California law measures this disclosure by an objective standard established in the state Supreme Court case *Cobbs v. Grant*. You have a duty of reasonable disclosure regarding the proposed therapy and the dangers inherently and potentially involved in each choice. [^A67] Disclosure is measured by what is material to the patient's decision. *Cobbs* requires reasonable disclosure of the available choices and the dangers involved in each, including any known risk of death or serious harm, with complications explained in lay terms. [^A67] Whether the omission mattered is judged objectively: what would a prudent person in the patient's position have decided if properly informed. [^A67] The court also set a practical limit, noting that a "mini-course in medical science is not required." [^A67] You are expected to inform the patient in plain language, not deliver a pathology lecture. For dental hygienists, this disclosure duty operates within a strict scope boundary. The practice of dental hygiene expressly excludes diagnosis and comprehensive treatment planning. [^A8] Therefore, a hygienist explains the hygiene care plan and the specific services they will perform, but must never present a diagnosis as their own. This boundary applies in all settings. For example, when performing unsupervised oral health screenings, the statute requires you to refer any screened patients with possible oral abnormalities to a dentist for a comprehensive examination, diagnosis, and treatment plan. [^A12] You must disclose what the screening found, but you cannot diagnose the condition. ### T2 — Respecting patient autonomy A competent adult has the fundamental right to determine what is done to their own body, which includes the right to accept or refuse lawful medical and dental treatment. [^A67] The American Dental Hygienists' Association (ADHA) Code of Ethics names individual autonomy and respect for human beings as a core value, reinforcing the patient's right to make informed choices. [^C2] The exam tests the legal consequences of failing to respect this autonomy. If you perform a procedure with no consent at all, or perform a substantially different procedure than the one the patient agreed to, the legal claim is battery—an intentional, unconsented touching. [^A67] If you obtain the patient's consent but fail to disclose the material risks and alternatives beforehand, the legal claim is professional negligence. [^A67] To ensure patients can exercise their autonomy, the disclosure must be communicated in a way the patient can comprehend to enable an intelligent choice. [^A67] While confirming a patient's subjective understanding through "teach-back" methods is excellent clinical practice, remember that the legal test in California remains objective: whether the disclosure met the needs of a prudent patient. [^A67] ### T3 — Obtaining informed consent Valid informed consent comes from someone with the legal authority to decide and follows an adequate disclosure of the information a reasonable patient needs, and the decision must be the patient's own. Consent is also specific to the procedure. A patient who consents to a routine prophylaxis has not consented to periodontal soft-tissue curettage, and exceeding the scope of the agreement crosses into battery. [^A67] The Dental Hygiene Practice Act illustrates the proper sequence of consent through its rules for interim therapeutic restorations (ITR). An ITR may only be placed after the diagnosis, treatment plan, and instruction to perform the procedure have been provided by a dentist. [^A11] Board-approved ITR courses must also teach patient or responsible-party consent as a criterion for placing an ITR (16 CCR §1109). [^A53] ### T4 — Treating minor patients When a patient is under 18, the primary legal question is who has the authority to consent. California law provides specific exceptions to the general rule that a parent or guardian consents for a minor. [^A66] A relative caregiver with whom the child lives can authorize dental care by completing a statutory Caregiver's Authorization Affidavit under Family Code § 6550. [^A65] A provider who relies on this affidavit in good faith is protected from liability. Family Code §6550(c) also requires no actual knowledge of contrary facts and completion of the applicable affidavit items. However, the affidavit does not strip the parents of their rights; if a parent or legal custodian communicates a contrary decision, the parent's decision generally supersedes the caregiver's. [^A65] A minor may consent to their own dental care only if they meet all three conditions of a "self-sufficient minor" under Family Code § 6922: they must be 15 years of age or older, living separate and apart from their parents or guardian, and managing their own financial affairs. [^A66] The statute explicitly states this applies "regardless of the source of the minor's income." [^A66] If a minor lawfully self-consents, the parents are not liable for the cost of the care. [^A66] The person who holds the power to consent also holds the power to refuse. An informed and appropriate medical decision made by a parent or guardian after consultation with a physician who has examined the minor does not constitute neglect. [^A47] However, under the Child Abuse and Neglect Reporting Act (CANRA), general neglect includes the negligent failure to provide adequate medical care that leaves a child at substantial risk of suffering serious physical harm or illness. [^A47] If a parent's refusal of care places the child at substantial risk of serious harm, the dental hygienist's duty as a mandated reporter is triggered, and a report must be filed based on reasonable suspicion. [^A48] Finally, access to a minor's treatment records generally follows the consent line. A parent or guardian usually acts as the minor's personal representative and has the right to inspect the chart. [^A46] ## Common traps * **"A signed form equals informed consent."** The form is merely evidence that a conversation took place. What the law requires is adequate disclosure of the material facts, not the signature itself. [^A67] * **"The legal test is whether the patient understood."** It is not. Whether the omission mattered is judged objectively: what would a prudent person in the patient's position have decided if properly informed. [^A67] While confirming comprehension is strong practice, it is not the doctrinal legal test. * **"Any adult relative can consent for a child."** Generally, a parent, a legal guardian, a relative caregiver with a completed Caregiver's Authorization Affidavit, or a qualifying self-sufficient minor may authorize care. An aunt in the waiting room without an affidavit cannot consent. [^A65] [^A66] * **"The caregiver's affidavit overrides the parents."** This is backwards. If a parent and an affidavit-holding relative disagree, a contrary decision by the parent or legal custodian generally supersedes the caregiver's decision. [^A65] * **"A self-sufficient minor must be 18 to consent."** The age threshold for a self-sufficient minor is 15 or older. They must also be living apart from parents and managing their own finances. [^A66] * **"The hygienist presents the diagnosis to get consent."** Diagnosis and comprehensive treatment planning are expressly excluded from dental hygiene practice. A scenario where the hygienist diagnoses a condition to obtain consent describes a scope violation. [^A8] ## Check yourself Answer the original practice item, then take the free 15-question practice test to see every area. ## How to study this area Because Area 1A is worth 20% of the 2025 outline (the exam has 60 questions, 50 scored, in 90 minutes), it requires a significant portion of your study time. Do not skim this section assuming that general clinical experience will carry you through. The exam tests the specific legal mechanics of California consent law, not just general chairside etiquette. Focus your drills on the scenarios where rules collide. You need to be able to identify exactly who has the legal authority to say yes or no in a given situation, and what specific information must be disclosed before they do. 1. **Memorize the *Cobbs* standard:** Know the required disclosure of available choices and dangers, and the objective prudent-patient measure. 2. **Drill the minor consent ladder:** Practice identifying whether a scenario describes a parent, an affidavit-holding relative, or a self-sufficient minor aged 15 or older. 3. **Distinguish battery from negligence:** Map "no consent" to battery, and "missing disclosure" to professional negligence. 4. **Map the ITR sequence:** Remember that an ITR is placed only after the dentist's diagnosis, treatment plan and instruction, and that Board-approved ITR courses teach patient or responsible-party consent as a placement criterion. ## Questions candidates ask ### Can a 15-year-old consent if their parents pay their rent? Yes, if the minor is living separate and apart from their parents and managing the finances. Family Code § 6922 requires the minor to be managing their own financial affairs "regardless of the source of the minor's income." [^A66] ### Can a relative caregiver authorize dental care for a minor? Yes, if the child lives with them and they complete a statutory Caregiver's Authorization Affidavit. A provider who relies on this affidavit in good faith is protected from liability. However, if a parent communicates a contrary decision, the parent's decision generally supersedes the caregiver's. [^A65] ### Is it battery or negligence if I forget to mention a risk? It is professional negligence. Battery occurs when you perform a procedure with no consent at all, or perform a substantially different procedure than the one agreed to. If you obtain consent but fail to disclose a material risk, the consent exists but is uninformed, making it negligence. [^A67] [^A8]: Cal. Bus. & Prof. Code § 1908 — Practices Included in and Excluded from Dental Hygiene — The practice of dental hygiene (assessment, care-plan development/implementation, education, counseling, screenings) and the excluded acts. [Cal. Bus. & Prof. Code § 1908](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1908.&lawCode=BPC) [^A11]: Cal. Bus. & Prof. Code § 1910.5 — Additional Authorized Duties — Additional duties. [Cal. Bus. & Prof. Code § 1910.5](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1910.5.&lawCode=BPC) [^A12]: Cal. Bus. & Prof. Code § 1911 — Services Provided Without Supervision — Services without supervision. [Cal. Bus. & Prof. Code § 1911](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1911.&lawCode=BPC) [^A46]: Cal. Health & Safety Code § 123110 et seq. — Patient Access to Health Records — Patient access to health records. [Cal. Health & Safety Code § 123110 et seq](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=123110.&lawCode=HSC) [^A47]: Cal. Penal Code § 11165.7 (within CANRA; the DHBC 2025 Laws and Regulations book reprints Penal Code §§ 11164–11174.4); § 11165.2 (neglect definitions, the examining-physician parental-decision clause, and the religious-treatment proviso) — Child Abuse and Neglect Reporting Act. [Cal. Penal Code § 11165.7](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=11165.7.&lawCode=PEN) [PEN § 11165.2](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=11165.2.&lawCode=PEN) [^A48]: Cal. Penal Code § 11166 — Duty to Report — CANRA reporting duty and mechanics. [Cal. Penal Code § 11166](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=11166.&lawCode=PEN) [^A53]: 16 CCR § 1109 — Radiographic Decision-Making and ITR Course Requirements. Reprinted in DHBC 2025 Laws and Regulations, pp. 101–105 — Curriculum approval for radiographic decision-making and interim therapeutic restoration courses for RDH, RDHAP, and RDHEF (the § 1910.5 education pathway). [16 CCR § 1109](https://www.dhbc.ca.gov/lawsregs/new_dhbc_2025_laws_and_regulations_book.pdf) [^A65]: Cal. Fam. Code § 6550 — Caregiver's Authorization Affidavit — Caregiver's authorization affidavit. [Cal. Fam. Code § 6550](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=6550.&lawCode=FAM) [^A66]: Cal. Fam. Code § 6922 (with §§ 6920–6929, minor consent provisions) — Minor self-consent provisions. [Cal. Fam. Code § 6922](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=6922.&lawCode=FAM) [^A67]: *Cobbs v. Grant* (1972) 8 Cal.3d 229 — Informed consent doctrine in California. [*Cobbs v. Grant*](https://scocal.stanford.edu/opinion/cobbs-v-grant-30236) [^B1]: PSI Services LLC / DHBC, *Registered Dental Hygienist (RDH) Laws and Ethics Written Examination — Candidate Information Bulletin*, January 2026 edition — RDH exam logistics and blueprint. [PSI Services LLC / DHBC, *Registered Dental Hygienist](https://www.dhbc.ca.gov/formspubs/candidate_handbook.pdf) [^C2]: American Dental Hygienists' Association, *Code of Ethics* (revised October 2024); on the PSI bulletin's recommended preparation list via adha.org — ADHA Code of Ethics. [American Dental Hygienists' Association, *Code of Ethics*](https://www.adha.org/wp-content/uploads/2025/03/ADHA-Code-of-Ethics_FY24_10_18.pdf) ## Next step [Take the free 15-question practice test](/rdh/free-practice-test): every outline subarea, graded answers with reasons, and an area-by-area result. Price: $99 once, or $89 after you finish the free practice test. 180 days of access. [See what the full prep includes](/products/california-rdh-law-ethics). Independent exam preparation. No Board endorsement or pass guarantee. Independent educational preparation, not legal advice, and not affiliated with or endorsed by the Dental Hygiene Board of California or PSI. Confirm current requirements with the Dental Hygiene Board of California.