Local Anesthesia Course Requirements for Dental Hygienists, by State

Where states authorize hygienists to administer local anesthesia at all, the required course length varies enormously.

ADHA's Local Anesthesia Administration by Dental Hygienists chart (revised December 2025) lists a specific hour count for the large majority of states, ranging from as little as 12 hours (Kansas) up to 72 hours plus a minimum of 20 injections (Louisiana).

Eleven states — Idaho, Iowa, Minnesota, Missouri, Montana, Nevada, Oregon, South Carolina, South Dakota, Utah, and Wyoming — list "No" in this column, meaning the chart doesn't specify an hour count, not that no course is required.

This page owns the chart's Education Required and course-hour columns specifically.

It doesn't re-answer whether a given state allows local anesthesia at all — see the national overview for that question.

The chart tracks these as separate requirements. Education Required describes who may teach or approve the course — most states specify "Accredited" (an accredited dental hygiene or dental program), "Board Approved" (approved directly by the state dental board), or "Accredited/Board Approved" (either qualifies).

Texas adds a third option, "CODA Approved Course." California's cell is its own sentence: the course must be "taken as part of a DH program/approved by the Dental Hygiene Board of CA."

Legal Requirements for Local Anesthesia Courses — the column this article calls "course hours" — sets how long that approved course must run, when a state specifies a number at all.

Most states split it into didactic (classroom) hours and supervised clinical hours; a few add a lab-hour component or a minimum number of injections instead of, or alongside, an hour count.

The Education Required and course-hour cells for every jurisdiction, exactly as ADHA's December 2025 chart lists them. "No" in the course-hours column means the chart doesn't specify an hour count for that state — not that no course is required.

Counting directly from the December 2025 extract: 11 jurisdictions — Idaho, Iowa, Minnesota, Missouri, Montana, Nevada, Oregon, South Carolina, South Dakota, Utah, and Wyoming — list "No" in the course-hours column, meaning no specific hour count is stated (education is still required). 3 jurisdictions — Mississippi, Nebraska, and North Dakota — specify only that the course "must include clinical and didactic" instruction, with no hour figure attached.

Delaware, which only authorized hygienist local anesthesia in 2025, lists "Pending Board Regulations" for this column — the rule hasn't been written yet.

Among the states that do specify hours, most split the total between didactic and clinical time, and a handful add a minimum injection count on top: Arizona (9 types of injections), California (8 types), Hawaii (50 injections), Louisiana (minimum of 20), and Maine (minimum of 50).

Washington is the one outlier that specifies an injection count — 10 — with no hour figure at all.

Where a full hour figure is given, it ranges from Kansas's 12 hours up to Louisiana's 72 hours, the widest spread on this column of the chart.

Course length is one column of a chart that also tracks supervision level, whether infiltration and/or block injections are authorized, exam requirements, and how each state's authority was established.

This article covers only the Education Required and course-hour columns; the ADHA chart's exam-required column names the same regional agencies — WREB, NERB, CDCA-WREB-CITA — that show up in the separate licensure clinical board exam our clinical board exams guide covers, though the two are different tests for different purposes.

For whether your state permits hygienist-administered local anesthesia at all, see the national overview.

Local anesthesia is what numbs a patient before procedures like scaling and root planing; the milder alternative, applied without a needle, is covered in topical anesthesia by state.

"No" in the course-hours column doesn't mean no training is required — it means ADHA's chart doesn't list a specific hour count for that state, and the underlying practice act or board rule may still set expectations the chart doesn't capture.

Course-hour requirements also change: Delaware's 2025 authorization is still awaiting written regulations, and any state can revise its numbers by legislative or board action.

Start with your state dental board or an ADHA-approved local anesthesia course provider for the current requirement where you're licensed or plan to practice.

For the rest of what a hygienist can and can't do, see our full breakdown of hygienist scope limits.

This article is general information, not legal or clinical advice. Course requirements vary by state and change over time — confirm current requirements with your state dental board before enrolling in or teaching a local anesthesia course.