Medical nutrition therapy is a medical treatment. Like other non-physician practitioners providing medical treatments, registered dietitian nutritionists generally can practice MNT because of licensure and certification laws, which provide authority for RDNs to provide this medical service. It is with this understanding that the Academy strongly recommends — unless there is an applicable exception or exemption or a state does not provide for licensure or certification requirements — practitioners hold licensure or certification in all states where the practitioner's clients or patients are located when services are provided.
Links to State Boards, Statutes and Regulations
Statute and Regulation Details
Licensure (or Certification) by Endorsement of RDN Credential/Exemptions
WAC 246-822-120 (Regulations)
(1) Individuals applying for certification as a certified dietitian must submit:
(a) A completed application form with fee; and
(b) Verification of current registration status with the commission on dietetic registration
Licensure (or Certification) by Reciprocity or Endorsement of Another License
RCW 18.138.050 Certification without examination.
The secretary may certify a person applying for the title "certified dietitian" without examination if such person is licensed or certified as a dietitian in another jurisdiction and if, in the secretary's judgment, the requirements of that jurisdiction are equivalent to or greater than those of Washington state.
Temporary/Provisional Licensure (or Certification)
Updated August 2023
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