# California RDH Law & Ethics Exam Area 3A: Obligation to the Patient

What Area 3A of the California RDH Law and Ethics exam tests: duty of care, patient abandonment, nondiscrimination and ethical principles.

Area 3A · 20% of the California RDH Law & Ethics exam. Last updated 2026-09-24.

Subarea 3A, "Obligation to the Patient," accounts for 20% of the 2025 outline (the exam has 60 questions, 50 scored, in 90 minutes). It tests the ethical and legal boundaries of what a registered dental hygienist owes the patient in the chair, from staying within your scope of competence to recognizing situations that need the dentist's diagnosis. Mastering this area means understanding how the fundamental principles of dental hygiene ethics are enforced by the hard rules of the Dental Hygiene Practice Act.

## 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). [^B1] |
| **Scope vs. competence** | Excluded acts (diagnosis, cutting, prescribing) are never permitted; permitted acts require personal competence (BPC §1954). [^A8][^B3] |
| **Ethics vocabulary** | The outline names universality (K24), complementarity (K38) and non-maleficence (K40). [^B1] |
| **Standard of care** | Excessive treatment is a misdemeanor; abandonment requires written notice and ample transition time. [^A37] |
| **Crisis reporting** | Patient death or unscheduled hospitalization over 24 hours requires a 7-day written report to the board. [^A37] |

## What the exam expects you to know

### T18 — Practice within scope and maintain competence

Your legal scope of practice is the outer boundary; your personal competence is the inner boundary. You must stay inside both. California law establishes hard statutory edges that no amount of skill or employer instruction can move. The practice of dental hygiene never includes diagnosis and comprehensive treatment planning; placing, condensing, carving, or removing permanent restorations; surgery or cutting on hard and soft tissue; prescribing medication; or anesthesia and sedation beyond nitrous oxide-oxygen and course-certified local anesthesia. [^A8] Performing an excluded act or acting beyond the scope of your license and field of competence is unprofessional conduct (BPC §1954). [^B3] Aiding another hygienist to practice incompetently is also unprofessional conduct. [^A37]

Maintaining competence also means keeping your knowledge current. Continuing education is a condition of license renewal, and the units must be earned during the preceding two-year period. [^A33] A licensee issued a license for less than two years begins accumulating continuing education in the next biennial renewal period, meaning no units are required for the first renewal. [^A51] Beginning with the second renewal, a registered dental hygienist must complete 25 units each two-year period. This must include 2 units of California-specific infection control, 2 units on the California Dental Practice Act, and Basic Life Support (BLS) with a live, in-person skills session, which is capped at 4 units. Correspondence or self-study courses are capped at 50% of the total units. [^A51]

### T19 — Cultural sensitivity and non-discrimination

Cultural sensitivity is treated as a working clinical skill. The ADHA code recognizes that cultural beliefs influence client decisions and that clients have the right to full disclosure to make informed choices. [^C1][^C2]

This task also tests the principle of complementarity. Complementarity requires considering the values and perspectives of others before making decisions or taking actions affecting them. [^C2]

In the ADHA code, non-discrimination is a standard owed "To Clients"; justice and fairness is about distributing health-care resources fairly. [^C2] Infection-control rules require standard precautions for every patient regardless of infection status (16 CCR §1005), and the ADHA code calls on hygienists to serve all clients without discrimination. [^A50][^C2]

### T20 & T22 — Minimize harm and promote well-being

These tasks test your ability to distinguish and apply two core ethical values: non-maleficence and beneficence. Non-maleficence is the protective duty to do no harm. [^C2] It covers foreseeable, preventable harm, such as working beyond your competence, using unsterile instruments, or continuing a procedure when the patient is in distress. California law enforces this duty through discipline, making incompetence, gross negligence, and repeated acts of negligence grounds for license revocation or suspension. [^A35]

Beneficence is the positive duty to promote well-being. [^C2] It obligates hygienists to advance the health of individuals and the public through quality clinical care, oral-health education, and prevention. Acting in the patient's best interest means recommending exactly what the patient's condition requires, telling the truth about findings (veracity), and protecting the patient's welfare when it conflicts with the employer's schedule or the hygienist's convenience. [^C1]

### T21 — Standard of care and excessive treatment

For excessive treatment, the test is "the customary practice and standards of the dental hygiene profession" (§1950.5(n)). [^A37] Under §1956, requiring or knowingly permitting care that discourages necessary treatment is unprofessional conduct. [^B3] 

Over-treatment has its own criminal provision. Unprofessional conduct includes the clearly excessive administering of treatment, procedures, or use of facilities. Violating this specific subdivision is a misdemeanor, punishable by a fine of $100 to $600, imprisonment for 60 to 180 days, or both. [^A37] Recommending unneeded scaling and root planing or padding visits with unnecessary procedures falls directly into this category.

Ending care without the §1950.5(s) safeguards is abandonment. Abandonment is defined as discontinuing treatment without written notice to the patient, before the patient has ample opportunity to secure the services of another registered dental hygienist, registered dental hygienist in alternative practice, or registered dental hygienist in extended functions, and provided the health of the patient is not jeopardized. [^A37] A hygienist may lawfully end a professional relationship, but only when all three of these safeguards are met.

### T23 — Manage safety and crisis situations

Safety management relies on prepared procedures. Every applicant must hold a current BLS certification, which must be kept current at renewal through an approved hands-on course. [^A17][^A51] §1912 makes general supervision the default unless the situation in the dentist's office calls for immediate relief of severe pain or immediate diagnosis and treatment of unforeseeable dental conditions that could lead to serious disability or death. Those situations need the dentist's diagnosis. [^A14]

After a crisis, the law imposes a strict reporting clock. A licensee must report to the board in writing within seven days the death of a patient during a procedure, the discovery of a patient's death related to a procedure, or any non-scheduled removal of a patient to a hospital or emergency center for medical treatment exceeding 24 hours as a result of treatment. [^A37]

### T24 — Refer patients for additional treatment

When a patient's needs exceed the scope of dental hygiene, referral is a mandatory duty. The clearest example in the Dental Hygiene Practice Act involves unsupervised screenings. A registered dental hygienist shall refer any screened patients with possible oral abnormalities to a dentist for a comprehensive examination, diagnosis, and treatment plan. [^A12] Because diagnosis is excluded from the practice of dental hygiene, the screening finding is only useful once the patient is handed off to a diagnosing provider. [^A8]

## Common traps

*   **Treating over-treatment as just an ethics issue:** Clearly excessive treatment is unprofessional conduct and a misdemeanor carrying a $100 to $600 fine, 60 to 180 days of imprisonment, or both. [^A37]
*   **Assuming a difficult patient can be dropped immediately:** Abandonment is unprofessional conduct unless you provide written notice, allow ample opportunity for the patient to secure another provider, and ensure the patient's health is not jeopardized. [^A37]
*   **Refusing to treat an infectious patient for safety reasons:** Infection-control rules require standard precautions for every patient regardless of infection status (16 CCR §1005), and the ADHA code calls on hygienists to serve all clients without discrimination. [^A50][^C2]
*   **Confusing universality with complementarity:** Universality means if one individual judges an action to be right or wrong in a given situation, other people considering the same action in the same situation would make the same judgment. Complementarity requires considering the values and perspectives of others before making decisions or taking actions affecting them. [^C2]
*   **Thinking a screening ends the job:** After any screening, the statute dictates that a hygienist "shall refer" patients with possible oral abnormalities to a dentist for diagnosis and a treatment plan. [^A12]

## Check yourself

Answer the original practice item, then take the free 15-question practice test to see every area.

## How to study this area

Allocate your study time to match this subarea's 20% weight. Because this section tests the intersection of ethics and law, you must understand how the ethical principles map to the disciplinary statutes. 

1.  **Learn the vocabulary:** Memorize the ADHA and CDHA named principles (universality, complementarity, non-maleficence, beneficence, justice and fairness, veracity, autonomy). You must be able to read a scenario and identify which specific principle is being applied or violated.
2.  **Memorize the discipline triggers:** Know the exact elements of abandonment and the specific misdemeanor penalties for excessive treatment. 
3.  **Map the crisis timeline:** Understand the sequence of managing an emergency, from maintaining BLS certification beforehand, to recognizing when unforeseeable dental conditions require the dentist's diagnosis, to the 7-day written report required afterward.
4.  **Respect the scope wall:** Drill the five excluded acts. Remember that employer pressure never legalizes an excluded act, and the hygienist remains directly accountable for their own license.

## Questions candidates ask

### Do I need to study the ADA dentist ethics code for this exam?
No. The bulletin's recommended-reading list links to cdha.org and adha.org, the hygienists' associations, though the printed names read 'California Dental Association' and 'American Dental Association.' Its outline uses hygiene-code terms such as universality, complementarity and non-maleficence, so the ADHA and CDHA codes are the natural references. The list is optional and not an endorsement. [^B1]

### What is the exact penalty for excessive treatment?
Under the Dental Hygiene Practice Act, clearly excessive treatment is unprofessional conduct and a misdemeanor. It is punishable by a fine of $100 to $600, imprisonment for 60 to 180 days, or both. [^A37]

### How many continuing education units do I need for my first license renewal?
Zero. A licensee issued a license for less than two years begins accumulating continuing education in the next biennial renewal period, meaning no units are required for the first renewal. [^A51]

[^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)

[^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)

[^A14]: Cal. Bus. & Prof. Code § 1912 — General Supervision Requirement — Default rule. [Cal. Bus. & Prof. Code § 1912](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1912.&lawCode=BPC)

[^A17]: Cal. Bus. & Prof. Code § 1917 — Requirements for Licensure — RDH licensure requirements. [Cal. Bus. & Prof. Code § 1917](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1917.&lawCode=BPC)

[^A33]: Cal. Bus. & Prof. Code § 1936.1 — Continuing Education — Continuing education as a renewal condition. [Cal. Bus. & Prof. Code § 1936.1](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1936.1.&lawCode=BPC)

[^A35]: Cal. Bus. & Prof. Code § 1949 — Consequences of Unprofessional Conduct and the Like — Discipline for unprofessional conduct, incompetence, gross negligence, repeated negligent acts, or license issued by mistake. [Cal. Bus. & Prof. Code § 1949](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1949.&lawCode=BPC)

[^A37]: Cal. Bus. & Prof. Code § 1950.5 — Unprofessional Conduct Defined — Unprofessional conduct defined, subds. (a)–(z). [Cal. Bus. & Prof. Code § 1950.5](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1950.5.&lawCode=BPC)

[^A50]: 16 CCR § 1005 — Minimum Standards for Infection Control. Reprinted in DHBC 2025 Laws and Regulations, pp. 76–78 — Minimum Standards for Infection Control. [16 CCR § 1005](https://www.dhbc.ca.gov/lawsregs/new_dhbc_2025_laws_and_regulations_book.pdf)

[^A51]: 16 CCR §§ 1016–1017 — Continuing Education Courses, Providers, and Units. Reprinted in DHBC 2025 Laws and Regulations, pp. 78–83 — Continuing education. [16 CCR §§ 1016–1017](https://www.dhbc.ca.gov/lawsregs/new_dhbc_2025_laws_and_regulations_book.pdf)

[^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)

[^B3]: Dental Hygiene Board of California, *2025 Dental Hygiene Board of California Laws and Regulations*, revised January 2025 — The first publication on the CIB's list of recommended preparation references (recommended, not the corpus the exam is written from). [Dental Hygiene Board of California, *2025 Dental Hygiene Board of California Laws and Regulations*, revised January 2025](https://www.dhbc.ca.gov/lawsregs/new_dhbc_2025_laws_and_regulations_book.pdf)

[^C1]: California Dental Hygienists' Association, *Code of Ethics*, within the CDHA Policy Manual (amended June 2022); on the PSI bulletin's recommended preparation list via cdha.org — CDHA Code of Ethics. [California Dental Hygienists' Association, *Code of Ethics*, within the CDHA Policy Manual](https://cdha.org/Portals/CDHA/Resources/CDHA%20Policy%20Manual%20Amended%20June%202022_FINAL.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)

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