How to Become a Dental Hygienist

Sources Salary and job-outlook data: U.S. Bureau of Labor Statistics Occupational Outlook Handbook, Dental Hygienists (SOC 29-1292, May 2024 data). Professional standards: American Dental Hygienists' Association (ADHA). Program accreditation: Commission on Dental Accreditation (CODA). Licensure examination: Joint Commission on National Dental Examinations (JCNDE).

Licensure requirements and salary vary by state and change over time. This page is informational, not professional or legal advice. Salary figures are from BLS May 2024 data and may not reflect current local conditions. State board requirements change; verify current licensure rules with your state dental board before making enrollment or career decisions. The state board is the authoritative source. Dental Now is not affiliated with or endorsed by ADHA, CODA, or JCNDE.

Dental Now Editorial
Dental hygiene career research

Published June 2026

What dental hygienists do

RoleDental hygienists are licensed oral health professionals who provide preventive care and patient education under a state-issued license. The role requires independent clinical judgment, not just chairside assistance.

Daily tasks typically include performing oral health assessments (medical history review, blood pressure, extraoral and intraoral examinations), taking and interpreting dental radiographs, removing calculus and deposits from teeth through scaling and root planing, applying preventive agents such as fluoride and dental sealants, documenting findings in patient records, and providing oral hygiene instruction tailored to each patient's needs.

Dental hygienists work in general and specialty dental practices, community health centers, school-based dental programs, nursing facilities, public health departments, and dental hygiene education programs. Some states allow dental hygienists to practice under general supervision or in alternative practice settings with expanded independence. The scope of practice, permitted duties, and supervision requirements vary by state and are governed by the state dental practice act.

The RDH credential is distinct from a dental assistant. A dental assistant performs chairside support duties; a dental hygienist provides licensed clinical preventive services under their own state license and is responsible for their own professional judgment within that scope.

The path to becoming a dental hygienist: step by step

StepsUnlike dental assisting, there is no on-the-job pathway to RDH licensure. Every US state requires graduation from a CODA-accredited program and passing national and clinical licensing exams before you can practice.

Education options: associate vs. bachelor's degree

EducationAll paths to RDH licensure require a CODA-accredited dental hygiene program. The choice is between an associate degree (minimum for licensure) and a bachelor's degree (required for many advanced roles).

Associate degree (AAS or AS in Dental Hygiene)

The Associate of Applied Science (AAS or AS) in Dental Hygiene is the minimum degree required for RDH licensure in every US state. Most community college dental hygiene programs offer the associate degree pathway. Program length is typically 2 years of clinical coursework, but many programs require one semester to one year of prerequisites before admission to the clinical phase, bringing the realistic total to 2.5 to 3.5 years from starting college.

Associate programs are offered at community colleges, technical colleges, and some four-year universities. They are generally the lowest-cost path to entry-level RDH licensure. Some programs offer the associate degree as an articulation pathway into a bachelor's completion program for students who choose to continue later.

Bachelor's degree (BSDH)

The Bachelor of Science in Dental Hygiene (BSDH) typically takes 4 years for freshmen entrants or 2 additional years for RDHs completing a BS via a degree-completion program. A BSDH provides additional coursework in community health, education, research methods, and practice management. A bachelor's or higher degree is generally required for teaching positions in dental hygiene programs, public health roles, and administrative or research positions within the profession.

Some states or employers may prefer or require a BSDH. Both the associate and bachelor's pathways require graduation from a CODA-accredited program and passing the same national and clinical licensure exams.

The American Dental Education Association (ADEA) publishes a directory of dental hygiene programs at adea.org. CODA-accredited programs can be searched at coda.ada.org.

Observation hours: what they are and why they matter

Observation hoursPre-admission observation hours are time spent watching a licensed dental hygienist perform clinical care. They are separate from and much smaller than the in-program clinical hours you complete as a student.

Many CODA-accredited dental hygiene programs require or award competitive admission points for documented pre-admission observation hours with a licensed dental hygienist (RDH). The purpose is to confirm that applicants understand the profession before committing to a multi-year clinical program. Requirements vary significantly by program:

• Some programs set a minimum (for example, 8, 16, or 20 hours) that applicants must meet to be considered.
• Others use observation hours as a ranked factor in competitive admissions, awarding more points up to a ceiling.
• A few programs treat observation hours as recommended but not strictly required.

Important distinctions to keep in mind:

• Who you shadow matters. Most programs require that observation hours be completed with a licensed dental hygienist (RDH), not a dentist or dental assistant. Some programs are flexible; verify the program's specific language.
• Observation vs. clinical hours. Pre-admission observation hours (typically 8 to 40, depending on program) are for gaining exposure to the profession. In-program clinical hours are the patient care hours you complete as a student inside the CODA program. The two are not interchangeable. CODA does not mandate a fixed total of clinical hours across programs; each program sets its own clinical requirements to meet CODA's competency standards.
• Employment vs. observation. Work as a paid dental assistant or dental office employee may not count as observation hours for program admission. Programs draw a line between observing clinical care and performing paid duties. Keep these categories separate when documenting your hours.

See our per-state observation hour requirement pages for dental hygiene programs: dental hygiene program resources and observation hour requirements by state.

Licensure: the NBDHE and state licensing exams

LicensureRDH licensure in the US requires passing the NBDHE written exam, a regional or state clinical exam, and then applying to your state dental board. All three steps are required in every US state.

The NBDHE (National Board Dental Hygiene Examination)

The NBDHE is administered by the Joint Commission on National Dental Examinations (JCNDE), an independent agency of the American Dental Association. It is the national written exam for dental hygiene licensure and is accepted for initial licensure in all US states. Graduates of CODA-accredited dental hygiene programs are eligible to apply after meeting the program's graduation requirements.

The NBDHE tests knowledge across three major content areas:

• Scientific basis for dental hygiene practice: anatomy, histology, microbiology, biochemistry, pharmacology, pathology.
• Provision of clinical dental hygiene services: assessment, diagnosis, planning, implementation, and evaluation of patient care, including periodontics, radiography, pain control, and medical emergencies.
• Community health and research principles: public health, research design, ethics, and professional development.

Apply for the NBDHE through JCNDE at ada.org/education/jcnde. Verify current eligibility requirements, fees, and testing windows before applying. Dental Now is not affiliated with or endorsed by JCNDE.

Regional and state clinical exams

In addition to the NBDHE, most US states require a clinical examination that assesses hands-on patient care skills. The most widely used regional clinical exams for dental hygienists are:

• ADEX Dental Hygiene Examination (administered by the Commission on Dental Competency Assessments, CDCA) - accepted in most eastern and southeastern states.
• WREB Dental Hygiene Examination (administered by the Council of Interstate Testing Agencies, CITA) - widely accepted in western states.
• CRDTS Dental Hygiene Examination (Central Regional Dental Testing Service) - accepted in many midwest and southern states.

Some states, including California, administer their own clinical licensing exam. Accepted clinical exams vary by state and change periodically. Verify which clinical exams your target state accepts with the state dental board before scheduling.

State license application

After passing the NBDHE and any required clinical exam, you apply for a dental hygiene license from your state dental board. Most states require:

• Proof of graduation from a CODA-accredited dental hygiene program.
• Passing NBDHE scores (submitted directly from JCNDE).
• Passing scores from an accepted clinical exam.
• A dental law or jurisprudence examination (most states).
• CPR/BLS certification (most states).
• Application, fees, and background check as required by the state.

Continuing education (CE) requirements apply to license renewal in all states. CE hour totals and topics required for renewal vary by state. The state dental board is the authoritative source for current licensure and CE requirements.

Dental hygienist salary and job outlook

SalaryDental hygienists earn a median annual wage of approximately $94,260, according to the BLS (May 2024 data). Job growth is projected at 7 percent from 2024 to 2034, much faster than average.

Wages vary significantly by location. States with high costs of living and strong dental-care demand tend to report above-median wages for dental hygienists. Entry-level hygienists typically start below the national median; experienced RDHs in high-demand markets and specialty practices often earn above it. Part-time employment is common in dental hygiene; the BLS median reflects full-time-equivalent annual earnings for the occupation as a whole.

The job growth projection reflects continued growth in demand for preventive dental services, an aging US population requiring more periodontal and restorative care, and the trend toward dental hygienists taking on expanded-function duties in states that permit it. Dental hygiene has historically maintained consistent demand and a strong national median relative to other associate-degree healthcare occupations.

Prerequisites, program cost, and timeline

PrerequisitesMost CODA-accredited dental hygiene programs require applicants to complete prerequisite science coursework before admission. These requirements add to the total program timeline.

Common prerequisite courses

While requirements vary by program, the most commonly required prerequisite courses include:

• General biology with lab (1 to 2 semesters)
• General chemistry with lab (1 semester, sometimes 2)
• Anatomy and physiology with lab (1 to 2 semesters)
• Microbiology with lab (1 semester)
• English composition (1 semester)
• College-level algebra or statistics (1 semester, required by some programs)

Some programs require a minimum GPA in prerequisite courses (commonly 2.5 to 3.0) and may give preference to applicants with higher science GPAs. Competitive-admission programs at community colleges frequently have more applicants than seats; science GPA and observation hours are among the main differentiating factors.

Typical program cost

Program cost varies significantly by institution type and state:

• Community college associate programs: tuition typically ranges from approximately $3,000 to $15,000 for in-state students for the full program, not including fees, books, instruments, and clinical supplies. Total out-of-pocket cost including instruments and supplies is commonly higher.
• Four-year university BSDH programs: tuition varies widely, from approximately $20,000 to $60,000 or more for the full degree, depending on public vs. private institution and in-state vs. out-of-state enrollment.

These ranges are approximate, based on publicly available program tuition data as of 2025 to 2026. Tuition changes annually. Verify current tuition, fees, and total cost of attendance directly with each program before enrolling. Financial aid, scholarships from ADHA and its state constituent associations, and institutional aid are available for qualifying students.

Realistic timeline to licensure

A realistic timeline for most applicants pursuing an associate degree pathway:

• Prerequisite coursework: 1 to 3 semesters (6 months to 1.5 years, depending on how many prerequisites you already have and how many you can take per semester).
• Competitive admission process: typically one to two application cycles (programs admit once or twice per year).
• Clinical program (AAS): 2 years.
• NBDHE preparation, exam, and results: 1 to 3 months after graduation.
• Clinical exam and state license application: 1 to 3 months.

Total realistic timeline from starting prerequisites to receiving an RDH license: approximately 3 to 5 years for most applicants. The ADHA and ADEA publish resources for prospective hygiene students at adha.org and adea.org.

Frequently asked questions