N.H. Admin. Code § Den 302.03
In addition to the qualifications included in RSA 317-A:21, an applicant for examination and registration as a dental hygienist in the state of New Hampshire shall have taken and passed the American Board of Dental Examiners (ADEX) dental hygiene examination, or other similar U.S. regional or state board examination for dental hygienists, including clinical procedure components. The applicant shall complete the examination within the 3 year period prior to the completion of the licensing process in New Hampshire, unless the applicant seeks licensure by endorsement certification as provided in Den 301.01(h) pursuant to RSA 317-A:12 III, in which circumstance the 3 year period shall not apply.
N.H. Admin. Code § Den 302.03
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