Class Code 8839
Dental Or Orthodontia Practices
Class Code 8839 covers California dental and orthodontia practices including the clinical and administrative staff who work in those offices. The September 1, 2026 approved pure premium rate for this class is $0.935 per $100 of payroll — a relatively low base rate reflecting lower frequency of severe traumatic claims compared with many trade classifications.
What Class Code 8839 Covers
This classification applies to offices that provide general dentistry, specialty dental services and orthodontic care where employees deliver patient exams, prophylaxis, restorative care, orthodontic appliance placement and adjustments, dental radiography, instrument sterilization and routine lab work performed in-house. It covers both clinical personnel (dentists, orthodontists, hygienists, dental assistants) and nonclinical staff employed directly by the practice (receptionists, office managers, billing staff). Services include preventive cleanings, fillings, crowns and root-canal preparation performed in the office, bracket and wire orthodontic procedures, impressions and in-office fabrication or adjustment of appliances. Mobile dental units operated by a licensed practice performing the same clinical procedures are typically included under this code when payroll is paid by the practice.
Who It Applies To
- General dental practices and specialty dental clinics
- Orthodontic practices providing braces, aligners, and adjustments
- Dental hygienists and licensed dental assistants employed by the practice
- Dentists and orthodontists on payroll (not independent contractors)
- Front-office staff, billing and scheduling employees of the practice
- In-house dental lab technicians employed by the office
Common Job Duties
- Chairside assisting for restorative and orthodontic procedures (passing instruments, suction, retraction)
- Prophylaxis, scaling, periodontal maintenance and patient cleanings
- Taking and processing dental X-rays and digital imaging
- Preparing and taking impressions, pouring models, trimming appliances
- Instrument cleaning, sterilization, disinfection and inventory of reusable devices
- Applying/adjusting brackets, archwires, cementing appliances and removing adhesive
- Front-desk tasks including scheduling, billing, and patient record management
Common Injury Risks
Understanding the $0.935 Rate
The pure premium rate of $0.935 per $100 of payroll is the WCIRB-approved base charge representing expected claim costs for this classification. To calculate the pure premium, divide total payroll by 100 and multiply by 0.935; insurers then add their expense loading and apply your experience modification, policy deductible or retrospective adjustments to arrive at the final premium. Final cost is affected by claims history (experience mod), payroll mix among classifications, safety programs, and insurer-specific underwriting adjustments.
Cal/OSHA Compliance Requirements
Dental practices must follow Cal/OSHA requirements including the Bloodborne Pathogens standard (8 CCR 5193), Hazard Communication (8 CCR 5194), and maintaining an Injury and Illness Prevention Program (IIPP) per 8 CCR 3203. Additional compliance areas include proper use of PPE, engineering controls to reduce sharps risk, radiation safety measures and operator training for dental X-ray equipment, and documented training for use and safe handling of disinfectants and chemicals.
How Key HR Helps Employers Under Class Code 8839
A PEO like Key HR helps dental practices control workers' comp costs through consolidated claims management, experienced medical bill review, and return-to-work programs that reduce indemnity costs. Key HR provides tailored safety templates (BBP training, sterilization protocols, ergonomic guidance), Cal/OSHA recordkeeping support, and HR administration that can help improve experience modification and lower premium over time.
Get a QuoteFrequently Asked Questions
Does Class Code 8839 include dental laboratories?
In-house dental technicians employed directly by the practice are typically covered under 8839, but standalone commercial dental laboratories that serve multiple clients usually fall under a different WCIRB classification. Confirm classification when an independent lab is a separate legal entity.
Are front-desk receptionists included in this code?
Yes. Administrative and clerical staff on the payroll of the dental or orthodontic practice are generally included in Class Code 8839, provided they work at the same established business location and perform typical office duties.
What practical steps reduce workers' comp claims in dental offices?
Key measures are a comprehensive BBP exposure control plan, needle/sharps safety devices and training, mandatory ergonomics and posture training for clinical staff, chemical exposure controls and substitution, consistent sterilization protocols, and prompt post-exposure follow-up. Documentation and return-to-work planning also reduce claim costs and lost time.
Quick Facts
- Class Code
- 8839
- Classification
- Dental Or Orthodontia Practices
- Pure Premium Rate
- $0.935 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
Key HR provides pay-as-you-go workers' comp for California employers — no large deposits, no audits, better rates.
Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 8839?
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