What is an dental hygienist license, and how do you get one?
Every state licenses dental hygienists. The path is an associate or bachelor's degree from a dental hygiene programme accredited by the Commission on Dental Accreditation, a passing score on the National Board Dental Hygiene Examination, a clinical examination administered by a regional testing agency or the state, and an application to the state dental board that usually includes a jurisprudence element on the state's dental practice act. Local anaesthesia and nitrous oxide administration require separate state permits where they are allowed. Dental hygienists earn a $98,100 median.
- Complete a CODA-accredited dental hygiene programme.
- Pass the National Board Dental Hygiene Examination.
- Pass a clinical board examination accepted by your state.
- Apply to the state dental board, including its jurisprudence requirement.
- Add anaesthesia permits where offered, and renew with continuing education.
How to get a dental hygienist license
- 1
Complete a CODA-accredited dental hygiene programme
Enrol in an associate or bachelor's programme accredited by the Commission on Dental Accreditation. Accreditation is not optional: a non-accredited programme will not qualify you for the national board or for licensure in any state, so confirm the programme's status before enrolling.
- 2
Pass the National Board Dental Hygiene Examination
Sit the NBDHE, covering the scientific basis for practice, provision of clinical services, and community health and research principles, with a substantial case-based section. It is reported as pass or fail, and every state accepts it as the written component of licensure.
- 3
Pass a clinical board examination your state accepts
Take the practical examination assessing patient assessment and periodontal instrumentation, administered by a regional testing agency or by the state. Confirm which examinations and formats your board accepts before booking, because acceptance differs and this is the component most likely to need a retake.
- 4
Apply to the state dental board
Submit your application with proof of education, examination results and a background check, pay the fee, and complete the state's jurisprudence requirement on its dental practice act and infection-control rules. Once the licence issues you may practise as a Registered Dental Hygienist in that state.
- 5
Add permits and renew
Apply for local anaesthesia and nitrous oxide permits where your state offers them, and for any expanded-function or public health authorisation relevant to your practice setting. Then renew on the board's cycle with the continuing education it requires, including any mandated infection-control content.
Dental Hygienist license requirements
The structure is the same in every state even though the accepted clinical examinations and the scope of practice differ. To be licensed as a dental hygienist you need:
Accredited education
An associate or bachelor's degree from a dental hygiene programme accredited by the Commission on Dental Accreditation. Programmes combine didactic study with extensive supervised clinical practice on patients.
National written board
The National Board Dental Hygiene Examination, a comprehensive written examination covering scientific basis for practice, provision of clinical services and community health, including a case-based component.
Clinical examination
A practical examination assessing periodontal instrumentation and patient treatment, administered by a regional testing agency or by the state. States differ in which examinations they accept and whether patient-based or manikin-based formats are permitted.
State application and jurisprudence
Application to the state dental board with a background check, plus in most states an examination or attestation on the state's dental practice act and infection-control rules.
How much a dental hygienist license costs
Examination and licence fees are modest next to the accredited programme. The lines to budget for:
The accredited programme is the dominant cost. Examination fees are published by the testing bodies and state fees by each dental board; anaesthesia permits carry their own course and permit costs and are frequently employer-supported because they widen what the practice can offer.
The dental hygienist license exam
Two examinations stand between education and licensure. The National Board Dental Hygiene Examination, administered by the Joint Commission on National Dental Examinations, is a comprehensive written test covering the scientific basis for practice, the provision of clinical services, and community health and research principles, with a substantial case-based component; it is reported as pass or fail rather than a score. The clinical examination is separate and is what many candidates find harder: you are assessed on patient assessment and periodontal instrumentation against defined criteria, administered by a regional testing agency or by the state. States differ in which clinical examinations they accept and whether manikin-based formats are permitted alongside patient-based ones, so confirm your state's list before booking. Most states add a jurisprudence element on their own dental practice act.
How long it takes to get licensed
Three to five years from starting an accredited programme to holding a licence, with the clinical examination date usually setting the pace at the end.
Dental Hygienist license types: the full ladder
Hygiene does not have a journeyman ladder, but it does have meaningful tiers: the licence itself, permits that widen scope, and the expanded practice models some states have adopted.
Dental hygiene student
Treats patients in the programme's clinic under faculty supervision. Not licensed and cannot practise outside the educational setting.
Registered Dental Hygienist (RDH)
The core licence: prophylaxis, periodontal instrumentation, radiographs, assessment and patient education, under the supervision level the state requires.
Local anaesthesia permit
Permitted in most but not all states, and always by separate permit after additional accredited training and assessment. Materially widens what a hygienist can deliver independently.
Nitrous oxide permit
A separate authorisation in the states that allow hygienists to administer or monitor nitrous oxide analgesia, with its own training requirement.
Restorative or expanded functions
Some states allow hygienists to place restorations or perform other expanded duties under a further permit, blurring the line with expanded function dental assisting.
Public health / expanded practice hygienist
Several states have adopted models allowing hygienists to practise in schools, care homes and community settings with reduced or no direct dentist supervision, under a designated authorisation.
Bachelor's or master's hygienist
Not a separate licence, but the qualification route into education, research, public health programme leadership and industry roles beyond chairside practice.
Dental assistant vs Dental hygienist: dental hygienist license
Dental Hygienist license reciprocity between states
There is no national dental hygiene licence, and reciprocity is granted state by state. Most boards offer licensure by credentials or endorsement to a hygienist who holds an active licence, has practised for a period the board sets, and meets its examination standards — but the sticking point is often the clinical examination, because boards differ in which regional examinations and formats they accept, and an older or unaccepted clinical result can force a retake. Anaesthesia permits generally do not transfer at all and must be obtained again. Check the destination board's accepted examination list before relocating.
Dental Hygienistsalary & job outlook
Dental hygienists earn a median of about $98,100 per year ($47.16/hour), one of the highest medians of any role reachable through an associate degree, though a substantial share of hygienists work part time across multiple practices. Employment is projected to grow 7.0%, with roughly 15,300 openings a year. See the full dental hygienist salary guide for pay by state, city and experience level.
Dental Hygienist license requirements by state
Every state licenses hygienists, so what differs is which clinical examination the board accepts, how much dentist supervision is required, and which permits and expanded duties are available.
All 50 states license dental hygienists. The meaningful differences are the accepted clinical examinations, the supervision level required for particular procedures, whether local anaesthesia and nitrous oxide administration are permitted and under what permit, and whether the state has adopted an expanded practice or public health hygiene model. Confirm with the state dental board before applying.
Browse all state guides
Dental Hygienist license FAQs
Joint Commission on National Dental Examinations, NBDHE · Commission on Dental Accreditation (CODA) · U.S. Bureau of Labor Statistics, OEWS May 2025 (29-1292) · BLS Occupational Outlook Handbook (Dental Hygienists). Requirements and fees are set per state and change, confirm with your state board before applying.
Licensed dental hygienist? Find a job.
We verify your state license and match you with permanent employers. License renewal fees paid after placement.
Find Dental Hygienist Jobs →Your career research journey
Do your homework, then let the network do the rest.Get the job, then keep rising
FreeSet your intent, matching jobs come to you. No applying.
A roadmap to your next licence tier and higher pay band.
Once placed, we cover all certification, licence & career-guide fees.
Related · Dental Hygienist
Everything for dental hygienists in one place
Salary data, licensing, interview prep, and hiring, all cross-linked so you (and search engines) can move through the full dental hygienist cluster.