# California dental hygiene law and ethics exam

Answer: The RDH Laws and Ethics Written Examination is run by the Dental Hygiene Board of California through PSI: 60 items (50 scored plus 10 unscored pretest) in 90 minutes, with a 75% minimum passing score under 16 CCR §1121(c) — unlike the dentist exam, this one really does have a fixed percentage. Budget the $200 DHBC application fee plus $32.07 to PSI per sitting, and note the 1-year eligibility window. FY 2018–22 pass rates ran 80–89%. The official study text is the free 2025 DHBC Laws and Regulations book.

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Answer intent ID: `california-rdh-law-ethics-exam-guide`
Cluster: California dental law and ethics exam
Last verified: 2026-07-22
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## Direct answer

The RDH Laws and Ethics Written Examination is run by the Dental Hygiene Board of California through PSI: 60 items (50 scored plus 10 unscored pretest) in 90 minutes, with a 75% minimum passing score under 16 CCR §1121(c) — unlike the dentist exam, this one really does have a fixed percentage. Budget the $200 DHBC application fee plus $32.07 to PSI per sitting, and note the 1-year eligibility window. FY 2018–22 pass rates ran 80–89%. The official study text is the free 2025 DHBC Laws and Regulations book.

## Query patterns

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Source citations:
- `DHBC-RDH-CIB` PSI Candidate Information Bulletin — RDH Laws and Ethics Written Examination. <https://www.dhbc.ca.gov/formspubs/candidate_handbook.pdf>
- `DHBC-LAWS-2025` DHBC 2025 Laws and Regulations book. <https://www.dhbc.ca.gov/lawsregs/new_dhbc_2025_laws_and_regulations_book.pdf>

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