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Dental Now is a free platform for dental assistant students that logs your externship hours session by session, gets each one confirmed by your supervising dentist's NPI number, and generates a verified PDF record for your program, state board, or future employer.
State requirements for dental assistants vary significantly. Most states do not require DANB certification for basic assisting, but many require training or a credential before you can take radiographs. The table below covers all 51 US jurisdictions, sourced from DANB.
Sources Data sourced from DANB State Requirements database, the authoritative per-state source. CA and TX cross-checked against state dental boards. 51 jurisdictions verified as of June 2026.
Requirements change yearly, verify with your state board. The data below reflects DANB's published guidance as of June 2026. State dental boards update requirements regularly. Always confirm current rules with your state board before making career or enrollment decisions.
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Dental assistant requirements by state: all 51 jurisdictions
AnswerThere is no single national standard. Each state sets its own rules for training, radiography, and expanded functions. The table below covers all 50 states plus DC, sourced from DANB.
States marked "Recent change" have had rule updates in 2023-2025. "Varies, verify with state board" means DANB lists multiple pathways; click the source link to go directly to the DANB page for that state. This table is sourced DATA about state requirements, it is not a DANB endorsement of Dental Now.
| State | DANB Cert | Radiology Req. | Other requirements | Source | |
|---|---|---|---|---|---|
| Alabama | No cert required | No (not required to work as a basic dental assistant) | Not required | Expanded functions: Varies Varies, verify with state board |
DANB ↗ |
| Alaska | No cert required | No for basic assisting; expanded-function certificates require board-approved course/exam (not DANB-specific) | Varies | Expanded functions: Yes WREB restorative exam required for Restorative Functions certificate |
DANB ↗ |
| Arizona | No cert required | For radiography (DANB RHS exam) and as a pathway for EFDA | Required | Expanded functions: Yes Arizona EFDA exam (administered by DANB) for expanded functions |
DANB ↗ |
| Arkansas | Required for certain roles | Yes, DANB CDA certification required for radiography permit AND for expanded-functions permits | Required | Expanded functions: Yes Arkansas jurisprudence exam |
DANB ↗ |
| California Recent change | No cert required | DANB CDA is now ONE accepted RDA pathway (SB 1453, eff. July 1, 2025); not the sole requirement | Required | Expanded functions: Yes California RDA written + practical exam; board-approved courses required across all pathways |
DANB (cross-checked: dbc.ca.gov) ↗ |
| Colorado | No cert required | No (DANB RHS or CDA is one accepted radiography pathway, not required) | Required | Expanded functions: Varies No single mandated state DA exam (radiography via approved module or DANB exam) |
DANB ↗ |
| Connecticut Recent change | No cert required | For radiography (DANB RHS) OR a CODA-program competency assessment; EFDA requires DANB CPFDA + CRFDA | Required | Expanded functions: Yes No standalone state DA exam; radiography via RHS or CODA assessment |
DANB ↗ |
| Delaware | No cert required | For radiography, DANB RHS (or CDA) required for Dental Radiation Technician certificate (since Jan 1, 2016) | Required | Expanded functions: Varies DANB RHS (state DDRT exam discontinued 12/31/2015) |
DANB ↗ |
| Florida | No cert required | No (DANB not required to work as a dental assistant in FL) | Required | Expanded functions: Yes No state DA registration/exam for basic assisting; radiology via approved course |
DANB ↗ |
| Georgia | No cert required | No to work; DANB CDA is one pathway to enroll in board-approved EDDA courses | Required | Expanded functions: Yes No state DA exam for basic assisting; radiography via training proof |
DANB ↗ |
| Hawaii | No cert required | No (not required for basic assisting) | Not required | Expanded functions: Varies Varies, verify with state board |
DANB ↗ |
| Idaho | No cert required | No (not required for basic assisting) | Not required | Expanded functions: Varies Varies, verify with state board |
DANB ↗ |
| Illinois | No cert required | No (not required for basic assisting or basic expanded functions) | Not required | Expanded functions: Yes No state DA exam; expanded functions via board-approved courses |
DANB ↗ |
| Indiana | Required for certain roles | Yes for radiography, DANB CDA + DANB RHS + IDOH exam required for limited dental radiographic license | Required | Expanded functions: Varies IDOH-approved radiography exam (plus DANB exams) |
DANB ↗ |
| Iowa | No cert required | No (DANB certification is one pathway; not the sole requirement). RDA registration required. | Required | Expanded functions: Yes Iowa infection control/hazardous materials exam + jurisprudence exam for RDA |
DANB ↗ |
| Kansas | No cert required | No (not required for basic assisting) | Not required | Expanded functions: Yes No state DA exam; expanded functions via board-approved courses/training |
DANB ↗ |
| Kentucky | No cert required | No (not required for basic assisting) | Required | Expanded functions: Varies Varies, verify with state board |
DANB ↗ |
| Louisiana | No cert required | No DANB requirement; EDDA only via LSU, ULM, or Southern Univ. Shreveport programs | Required | Expanded functions: Yes No state DA exam for basic; EDDA via approved programs |
DANB ↗ |
| Maine | No cert required | For EFDA, DANB CDA certification (or active dental hygiene license) is a required pathway | Required | Expanded functions: Yes Maine jurisprudence exam (90% pass) for EFDA |
DANB ↗ |
| Maryland | No cert required | For radiography (DANB RHS or CDA) and as a pathway for general-duties registration | Required | Expanded functions: Yes Maryland General Dental Assisting Expanded Functions (MDG) exam (by DANB) OR DANB CDA for general-duties registration |
DANB ↗ |
| Massachusetts | No cert required | For radiography (DANB RHS or approved exam); for EFDA, any current DANB cert (CDA/COA/CPFDA/CRFDA) or approved body | Required | Expanded functions: Yes MA Board ethics and jurisprudence exam for EFDA |
DANB ↗ |
| Michigan | No cert required | For RDA, CODA-accredited program required (DANB pathway not the primary route here) | Required | Expanded functions: Yes Varies, verify with state board |
DANB ↗ |
| Minnesota Recent change | Varies | Varies, LDA licensure; verify DANB role per current pathway | Required | Expanded functions: Yes DASLE historically; 9/5/2024 rule variance allows LDA license without passing DASLE, verify current status |
DANB ↗ |
| Mississippi | No cert required | For radiography, DANB CDA OR a MS board-approved radiology seminar + exam | Required | Expanded functions: Varies MS board-approved radiology exam (or DANB CDA) |
DANB ↗ |
| Missouri | No cert required | For expanded functions, DANB CDA is a pathway (or MO Dental Assisting Skills exam) | Not required | Expanded functions: Yes Missouri Dental Assisting Skills exam (one EF pathway, alt. to DANB CDA) |
DANB ↗ |
| Montana | No cert required | For radiography, DANB RHS exam (or board-approved exam) required; DANB issues certificate of competence | Required | Expanded functions: Varies DANB RHS (or board-approved radiography exam) |
DANB ↗ |
| Nebraska | No cert required | For radiography, DANB exam is one option; EFDA via board courses | Required | Expanded functions: Yes Nebraska jurisprudence exam for EFDA |
DANB ↗ |
| Nevada | No cert required | No (DANB CDA recognized but not licensed by board for radiography) | Not required | Expanded functions: Yes Varies, verify with state board |
DANB ↗ |
| New Hampshire | No cert required | For radiography, DANB RHS or CDA is a required option; DANB CDA qualifies for listed functions | Required | Expanded functions: Yes No single state exam; radiography via DANB RHS/CDA |
DANB ↗ |
| New Jersey | No cert required | For radiography (DANB RHS, with course) and for RDA/expanded functions (DANB CDA or COA) | Required | Expanded functions: Yes No standalone state DA exam; DANB RHS/CDA + state course |
DANB ↗ |
| New Mexico | No cert required | For radiography (DANB RHS) and expanded functions (DANB Coronal Polish / Topical Fluoride exams) | Required | Expanded functions: Yes New Mexico jurisprudence exam (take-home) + state radiography clinical exam |
DANB ↗ |
| New York | Required for certain roles | Yes, DANB CDA (all 3 components) OR DANB RHS+ICE + NYPDA exam required for RDA licensure | Required | Expanded functions: Varies New York Professional Dental Assisting (NYPDA) exam (or full DANB CDA); NY Combination Exam available |
DANB ↗ |
| North Carolina | No cert required | DANB CDA is one pathway for DA II and for radiography; not the sole requirement | Required | Expanded functions: Yes NC radiological equivalency exam (alt. to DANB CDA) |
DANB ↗ |
| North Dakota | No cert required | DANB CDA is one RDA pathway; CRFDA component may be required for Restorative Functions permit | Required | Expanded functions: Yes DANB CDA (one RDA pathway) or CODA/board-approved program |
DANB ↗ |
| Ohio | No cert required | For radiography, Dental X-Ray Machine Operator cert (DALE/DANB RHS Review pathway, 75% post-assessment) | Required | Expanded functions: Yes DANB RHS Review post-assessment (DALE) or other specified requirements |
DANB ↗ |
| Oklahoma | No cert required | No DANB requirement stated; permits per function from Oklahoma Board of Dentistry | Required | Expanded functions: Yes Varies, verify with state board (permit per function) |
DANB ↗ |
| Oregon Recent change | No cert required | For radiography (DANB RHS) and EFDA (DANB CDA or ICE pathway) | Required | Expanded functions: Yes Oregon Expanded Functions General Dental Assisting exam (ORB exam discontinued 2024; Pathway III now uses DANB ICE) |
DANB ↗ |
| Pennsylvania | No cert required | For radiography, DANB RHS exam (retain proof of authority); EFDA is a state certification | Required | Expanded functions: Yes DANB RHS exam for radiography |
DANB ↗ |
| Rhode Island | No cert required | For expanded functions, must be a DANB-Certified assistant (CDA/COA/CPFDA/CRFDA/COMSA/CDPMA) | Required | Expanded functions: Yes No standalone state DA exam; expanded functions gated by active DANB certification |
DANB ↗ |
| South Carolina | No cert required | DANB CDA or DANB RHS certificate is one accepted radiography pathway (not sole requirement) | Required | Expanded functions: Yes SC board exam for nitrous-oxide monitoring (EDDA); radiography via certificate options |
DANB ↗ |
| South Dakota | No cert required | DANB RHS or CDA is one radiography pathway; DANB CDA is one RDA pathway | Required | Expanded functions: Yes DANB RHS/CDA or board-approved program (no single mandated state exam) |
DANB ↗ |
| Tennessee | No cert required | No DANB requirement stated for RDA; state certificates per function | Required | Expanded functions: Yes TN board coronal polishing written + clinical exams (for that EF) |
DANB ↗ |
| Texas | No cert required | DANB CDA is one accepted RDA/x-ray pathway (+ TX Jurisprudence Assessment); not the sole route | Required | Expanded functions: Yes TSBDE Jurisprudence Assessment + TSBDE-approved provider exam; human trafficking prevention course |
DANB (cross-checked: tsbde.texas.gov) ↗ |
| Utah | No cert required | No (DANB RHS is one radiography option, not required) | Required | Expanded functions: Varies No single mandated state DA exam; radiography via course or DANB RHS |
DANB ↗ |
| Vermont | No cert required | For expanded functions, DANB CDA is a required pathway (or CODA EF program) | Required | Expanded functions: Yes No standalone state DA exam; endorsement via course + experience |
DANB ↗ |
| Virginia | No cert required | For DA II, current DANB CDA certification required (initial registration & renewal) | Required | Expanded functions: Yes No standalone state DA exam; radiography via course/ARRT/DANB RHS |
DANB ↗ |
| Washington | No cert required | For EFDA, DANB CDA certification required; all DAs must be registered | Required | Expanded functions: Yes Washington State Restorative Exam (WARE, by DANB) + WREB clinical exam for EFDA |
DANB ↗ |
| West Virginia | No cert required | No (not required for basic assisting) | Not required | Expanded functions: Yes WV board nitrous-monitoring exam (for that EF); no general state DA exam |
DANB ↗ |
| Wisconsin | No cert required | For EFDA, DANB CDA is one pathway (with 1,000 hrs); 2,000-hr non-DANB route also exists | Not required | Expanded functions: Yes No state DA exam; EFDA via experience hours + classroom instruction |
DANB ↗ |
| Wyoming | Varies | Varies, verify with state board | Required | Expanded functions: Yes Varies, verify with state board |
DANB ↗ |
| District of Columbia | No cert required | For Level II, current DANB CDA (general duties) or board-approved cert required | Required | Expanded functions: Yes DC Dental Assistant Law Examination (for Level II registration) |
DANB ↗ |
Data sourced from DANB State Requirements database, June 2026. CA cross-checked against Dental Board of California; TX against TSBDE. For the full guide to this data, see dental assistant requirements by state.
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Your supervising dentist confirms each session using their NPI number. The record is verified, not self-reported, from the first session.
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What you get on Dental Now
ValueThree tools that address the main documentation challenges dental assistant students face, all in one place, all free.
Verified externship log
Record each session: date, duration, supervising dentist, and procedures observed or assisted. Your dentist confirms each session using their NPI number. Hours organized across multiple practices for easy reporting to your program or state board.
NPI-backed certificate
When your hours are confirmed, Dental Now generates a PDF certificate that includes the supervising dentist's NPI number and a unique verification link. Programs and employers can confirm the record independently against the federal NPPES provider registry.
Credential vault
Store your CPR certification, OSHA training, infection control course completion, and other credentials in one place. One link to share rather than hunting attachments when a program or employer asks for documentation.
About DANB certification
ImportantThe Dental Assisting National Board (DANB) offers credentials recognized across the US. Whether your state requires DANB or not, understanding what DANB certifies helps you plan the right training path.
DANB offers several credentials, the most widely known being the Certified Dental Assistant (CDA). To qualify for CDA, you typically need to complete a CODA-accredited program or have a combination of education and work experience, plus pass three component exams. The CDA is recognized in all states, but required in only a few (Arkansas, Virginia, New York for certain roles).
Many states require a DANB credential only for specific functions, such as radiography (DANB RHS) or expanded duties. Several states accept DANB as one pathway among alternatives. The table above captures this nuance per state.
Completing externship hours on Dental Now does not grant a DANB credential. Dental Now is a documentation and verification tool for your training hours, not a credentialing body. To pursue DANB certification, apply through danb.org directly.
Radiology requirements for dental assistants
AnswerMost states require some form of training or certification before a dental assistant can independently take X-rays. A minority have no separate state radiography requirement for DAs.
Before you take radiographs as a dental assistant, check your state's column in the table above. States with no separate radiography requirement (Alabama, Hawaii, Idaho, Illinois, Kansas, Missouri, West Virginia, Wisconsin) still have dentist supervision rules in effect, "no state X-ray certification" does not mean unsupervised radiography is permitted.
Guides for dental assistant students
ResourcesEach guide below covers one part of the DA requirements and documentation process in depth.
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