Dental Hygienist Requirements in Michigan: Scope of Practice & Direct Access
Dental Hygienists in Michigan are regulated by the Michigan Board of Dentistry. The ADHA records a direct-access provision for Michigan — PA 161 Dental Hygienist (Sec. 333.16625) — the rule that decides whether a dental hygienist there can work without a dentist on site; see below for what it covers.
Verify before you rely on this
At a glance
ADHA Direct Access chart
Direct access
Yes
Since 2005
Category
PA 161 Dental Hygienist
Michigan law
Statute
Sec. 333.16625
ADHA Practice Act chart
Permitted functions
11 of 22
Verified September 2026
Regulated by
Michigan Board of Dentistry
Michigan’s Direct-Access Provision: PA 161 Dental Hygienist
Dental hygienist with grantee status can practice in a public or nonprofit entity, or a school or nursing home that administers a program of dental care to a dentally underserved population.
Collaborating dentist need not be present for or authorize treatment, but dental hygienist must have continuous availability of direct communication with a dentist to establish emergency protocol and review patient records.
Provider services: Dental hygienist can provide full scope of dental hygiene services allowed under general supervision, including prophylaxis, sealants, and fluoride treatments.
Requirements: Dental hygienist must apply to the state department of community health for designation as grantee health agency.
What a Dental Hygienist Can Do in Michigan: Permitted Functions & Supervision Levels
Michigan lists eight of the ADHA chart's 22 functions at direct access: oral prophylaxis, x-rays, topical anesthesia, fluoride, pit/fissure sealants, scaling and root planing, study cast impressions, and removing sutures.
A hygienist provides these as they determine appropriate, without specific authorization.
Three functions sit at direct supervision, the chart's strictest level: local anesthesia, soft tissue curettage, and administering nitrous oxide, each requiring the dentist to be present.
The remaining eleven functions — placing and removing periodontal dressings, placing sutures, dental hygiene diagnosis, treatment planning, dental hygiene assessment, prescriptive authority, Botox, lasers, vaccines, and dermal fillers — are not listed on the chart for Michigan.
- Eight of the 22 functions, including oral prophylaxis, x-rays and pit/fissure sealants, are listed at direct access (A) for Michigan.
- Local anesthesia is listed at direct supervision (D) for Michigan, the chart's strictest level, meaning a dentist must be physically present while it is administered.
- Soft tissue curettage and administering nitrous oxide are also listed at direct supervision (D), so all three of Michigan's D-level functions require the dentist in the room.
- Removing sutures is listed at direct access (A), but placing sutures is not listed on the chart for Michigan, so the two closely related functions carry different chart status.
- Dental hygiene diagnosis, treatment planning, dental hygiene assessment and prescriptive authority carry no supervision level for Michigan on the chart, which ADHA records as not listed, a narrower statement than a ban.
- A
- Direct access: hygienists can provide services as s/he determines appropriate without specific authorization
- D
- Direct supervision: dentist needs to be present
Read the chart the way ADHA means it
Source: ADHA Dental Hygiene Practice Act Overview: Permitted Functions and Supervision Levels by State (8.24.26 update). This document is intended for informational purposes only and does not constitute a legal opinion regarding dental practice in any state. To verify any information, please contact your state's dental board.
Local Anesthesia by Dental Hygienists in Michigan
Michigan authorized hygienists to administer local anesthesia in 2002, under statute.
The ADHA Local Anesthesia chart lists direct supervision — the dentist must be present — for both block and infiltration injections, education from an accredited program, and a state or regional board-administered written exam (NERB).
The course requirement it records is 15 hours didactic and 14 hours clinical.
This matches the Practice Act chart's own direct-supervision listing for local anesthesia.
Confirm current course and permit requirements with the Michigan Board of Dentistry before enrolling or applying.
- State & Year Implemented
- 2002
- Supervision Required
- Direct
- Block and/or Infiltration
- Both
- Education Required
- Accredited
- Exam Required
- Yes – state or regional board-administered written exam (NERB)
- Authorized by Statute or Rule
- Statute
- Legal Requirements for Local Anesthesia Courses
- 15 hrs didactic; 14 hrs clinical
Source: ADHA Local Anesthesia Administration by Dental Hygienists – State Chart (Revised December 2025). This document is intended for informational purposes only and does not constitute a legal opinion regarding dental practice in any state. To verify any information, please contact your state's dental board.
Silver Diamine Fluoride by Dental Hygienists in Michigan
Michigan's ADHA silver diamine fluoride entry names SDF directly rather than folding it under a generic fluoride label.
It cites R338.11408 and lists ADHA's supervision line as Assignment.
The quoted provision, drawn from Michigan DHHS SDF guidelines, states that dentists and registered dental hygienists are permitted to apply SDF under the same authorization or restriction as other topical fluorides — the entry does not add a separate training, course, or setting requirement beyond that.
Confirm how Assignment supervision and the topical-fluoride authorization apply to your setting with the Michigan Board of Dentistry.
According SDF guidelines, dentists and registered dental hygienists are permitted to apply SDF under the same authorization or restriction as other topical fluorides.
Source: ADHA State Specific Information on Silver Diamine Fluoride (Revised September 2025). This document is intended for informational purposes only and does not constitute a legal opinion regarding dental practice in any state. To verify any information, please contact your state's dental board.
What Direct Access Does — and Doesn’t — Cover
Direct access is one dimension of scope, not scope itself. The ADHA’s direct-access chart records whether a dental hygienist can initiate treatment and treat a patient without a dentist present — the function-by-function supervision levels and the local anesthesia rules above come from two separate ADHA charts, and the three do not always line up neatly.
Don’t generalize from a direct-access provision to any other part of scope, and confirm specifics with the Michigan Board of Dentistry.
Frequently Asked Questions
Does a dentist have to supervise a dental hygienist in Michigan?
It depends on the setting and the hygienist's status.
Under the 2005 PA 161 Dental Hygienist provision (Sec. 333.16625), a dental hygienist who has applied for and received grantee health agency designation from the state department of community health can treat patients in a public or nonprofit entity, or a school or nursing home, that administers a program of dental care to a dentally underserved population — without a dentist authorizing or being present for treatment.
That hygienist must still maintain continuous availability of direct communication with a dentist to establish an emergency protocol and review patient records.
Outside grantee status and those settings, a dentist's supervision requirements apply as usual.
Confirm current requirements with the Michigan Board of Dentistry.
Who regulates dental hygienists in Michigan?
Dental Hygienists in Michigan are regulated by the Michigan Board of Dentistry.
Scope of practice is set by state law and changes over time, so verify current rules directly with the board before relying on them.
Does a dentist have to be present for local anesthesia in Michigan?
Yes.
Both ADHA charts list direct supervision for local anesthesia in Michigan: the Practice Act Overview lists it at direct supervision (D), and the Local Anesthesia chart confirms direct supervision for both block and infiltration injections, in place since 2002.
Direct supervision means the dentist must be physically present while the hygienist administers it.
That is the strictest supervision level on the chart, so treat it as a firm requirement and confirm current rules with the Michigan Board of Dentistry.
Which hygiene functions in Michigan require the dentist to be in the room?
Three functions on the ADHA chart carry direct supervision for Michigan: local anesthesia, soft tissue curettage, and administering nitrous oxide.
Direct supervision means the dentist must be present while the procedure is performed.
Eight other functions, including oral prophylaxis, x-rays, and sealants, are listed at direct access instead, requiring no specific authorization.
The chart does not indicate which cells carry ADHA's numbered footnotes, so check the Michigan Board of Dentistry's rules for any condition attached to these functions.
Does the Michigan chart list dental hygiene diagnosis or prescriptive authority?
No — dental hygiene diagnosis, dental hygiene assessment, treatment planning, and prescriptive authority are not listed on the ADHA Practice Act chart for Michigan.
Not listed means the chart does not record a supervision level for that function, which is not the same as a prohibition; the chart is simply silent on it.
Botox, vaccines, and dermal fillers are also not listed.
For what a hygienist may do in these areas under Michigan law, ask the Michigan Board of Dentistry directly.
Does a Michigan hygienist need special authorization to apply silver diamine fluoride?
According to Michigan DHHS SDF guidelines, cited under R338.11408, dentists and registered dental hygienists may apply SDF under the same authorization or restriction that governs other topical fluorides — the entry does not describe a separate SDF-specific permit, course, or setting requirement.
ADHA's supervision line for the entry is 'Assignment.' Confirm what authorization your setting requires, and how Assignment supervision applies to SDF specifically, with the Michigan Board of Dentistry.
Does Michigan's SDF guidance name silver diamine fluoride specifically, or treat it as an ordinary fluoride?
The Michigan DHHS guidance ADHA cites names SDF directly, then folds its authorization into the existing rule for topical fluorides rather than creating a separate SDF category: hygienists apply it under the same authorization or restriction as any other topical fluoride.
The entry does not state a distinct SDF training, course, or setting requirement beyond that.
Ask the Michigan Board of Dentistry how R338.11408 and Assignment supervision apply to SDF in your practice setting.
More Michigan & Dental Hygienist Resources
Sourced from the ADHA Direct Access States chart (Revised February 2025), the ADHA Dental Hygiene Practice Act Overview: Permitted Functions and Supervision Levels by State (8.24.26 update) and the ADHA Local Anesthesia Administration by Dental Hygienists – State Chart (Revised December 2025), and the ADHA State Specific Information on Silver Diamine Fluoride (Revised September 2025). Verified September 2026. This page is general information, not legal advice — confirm current rules with the Michigan Board of Dentistry.