Is "Nutritionist" a Protected Title in the US? It Depends on the State

What is the difference between a registered dietitian and a licensed dietitian?

CDR registration is national; licensure is set by each state. The RDN credential is issued by the Commission on Dietetic Registration on four conditions: a graduate degree from an accredited institution, accredited coursework, accredited supervised practice, and its registration examination. The graduate-degree requirement applies only to people establishing exam eligibility for the first time on or after January 1, 2024. Anyone already registered or eligible before that date is not required to obtain one. "RD", "RDN", "DTR" and "NDTR" are trademarks, and CDR states that use by a non-credentialed person "is strictly prohibited and enforced" independently of any state law.

Whether an RDN may practice in a given state is decided entirely by that state’s act. Some states license the practice, some license only a title, some certify a title, and some do nothing. Federal Medicare rules use the state credential first and fall back to CDR registration only in a state that offers neither (see how Medicare decides who may bill nutrition therapy).

Which states require a license to practice as a dietitian or nutritionist?

Twenty states and the District of Columbia reserve some part of nutrition practice to licensees, and the reservation is narrower than the label suggests in most of them. Illinois, North Carolina, Georgia, Montana, North Dakota and Nebraska reserve only medical nutrition therapy, as will Michigan once its law is in force, and each expressly allows an unlicensed person to sell individualized wellness recommendations, coaching and non-medical weight control so long as no protected title is used. Florida ties its prohibition to remuneration and then exempts paid wellness advice unless the client is under a physician's direct care for a condition requiring nutrition intervention, "not including obesity or weight loss", a phrase whose reading no board statement has settled. Minnesota, Louisiana, Maryland, South Dakota, Alabama, New Mexico and the District of Columbia are the strict ones, with no general carve-out for unlicensed paid counseling. Rhode Island exempts weight-loss and health-maintenance advice only where no disease-management counseling is involved. Maine exempts undefined "general" information, and Ohio's board rule limits the unlicensed to a closed seven-item list. Nebraska goes further than any other state and requires medical nutrition therapy to be delivered "with the consultation of" a physician, nurse practitioner or physician assistant.

Eleven states license but protect only the title: Alaska, Idaho, Indiana, Massachusetts, New Hampshire, Oklahoma, Oregon, Pennsylvania, South Carolina, Texas and West Virginia. In these an unlicensed person may practice for a fee provided they do not hold themselves out as a licensed dietitian. Texas is the clearest case. Its regulator states that “individuals are not required to hold a Texas dietitian license to practice dietetics in Texas in-person or via telehealth”, and only “licensed dietitian” and “LD” are protected; bare “dietitian” and “nutritionist” are free. New Hampshire’s purpose section says the act is not meant “to restrict the ability of any person to provide advice, counseling, or assessments in matters of food, diet, or nutrition and to receive compensation for such services”. Oregon repealed its practice restriction in 2011 and now protects only the words “L.D.” and “Licensed Dietitian”. Whether a licensed dietitian may then use an ordinary LLC does not follow from the license either: see LLC, PLLC or sole proprietor for a US dietitian.

Six states certify rather than license, and certification protects the title alone: Connecticut, New York, Utah, Vermont, Washington and Wisconsin. New York's regulator says directly that "certification is not required to perform nutritional counseling in New York". Connecticut protects only the Connecticut-prefixed forms, so "dietitian" and "nutritionist" on their own are free there. Vermont has certified dietitians since 1993, contrary to the common assumption that it has no law.

Four states have no license, certificate or registration: Arizona, California, Colorado and Virginia. Arizona's occupational code contains no dietetics chapter at all; the legislature passed licensure in 2021 and the governor vetoed it. Colorado's regulator recommended against regulation in December 2024, the legislature passed a bill anyway, and the governor vetoed it in May 2025. California and Virginia are not blank slates: both restrict a title the state does not issue. California makes it a misdemeanor to use "dietitian", "registered dietitian", "RD", "RDN" or "DTR" without CDR-equivalent qualifications, while stating that "any person" may provide nutritional advice and requiring a commercial practice to post a notice saying so. Virginia restricts "dietitian" and "nutritionist" to holders of private credentials and opens its chapter with a clause preserving anyone's ability to give nutrition advice.

Seven states are left ambiguous here on purpose, because the statute reads two ways and no authority resolves it: Arkansas, Delaware, Kentucky, Mississippi, Missouri, Nevada and Wyoming. Hawaii licenses dietitians through its Department of Health, not its professional-licensing division, but the statute text could not be read for this page. New Jersey enacted licensure in 2019 and, as of September 2026, its board is still drafting rules and issuing no licenses. Licensure is only one of the rules that vary: see what else changes by state when you open a practice.

Can anyone call themselves a nutritionist in the US?

In most states, yes. "Nutritionist" is protected by statute in seventeen states, and in Michigan from late 2027: Alabama, Alaska, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Minnesota, Mississippi, Montana, Nebraska, New Mexico, North Carolina, North Dakota, South Dakota and Tennessee. It is free in California, Texas, Illinois, Kansas, Arkansas, Idaho, Colorado, Maine, Oregon, Oklahoma, West Virginia and Arizona. Virginia is the exception among the no-credential states: it makes it a Class 3 misdemeanor to hold out as a "nutritionist" or "dietitian", alone or with "licensed", "certified" or "registered", unless the person holds one of six listed qualifications, CDR registration among them. Connecticut, New York and Washington protect only their certified forms, Massachusetts only "licensed nutritionist", Rhode Island only the compound "dietitian/nutritionist", and the District of Columbia attaches the word to its dietitian license. The pattern does not follow licensure: Illinois and Kansas are practice-exclusive states that leave the word free, while Alaska is a title-only state that protects it.

"Dietitian" is protected far more widely, but not universally. Texas protects "licensed dietitian" and leaves "dietitian" alone. Oregon protects only "Licensed Dietitian" and "L.D.", New York and Connecticut only their certified forms, and Pennsylvania only "licensed dietitian-nutritionist". Colorado, with no license at all, makes claiming to be a "dietitian" in the course of business a deceptive trade practice unless the person holds the qualifying degree plus supervised hours or CDR registration.

RD and RDN sit outside this map. They are CDR trademarks everywhere, and several states that regulate nothing else protect them by statute: California criminalizes misuse of "RD" and "RDN" with no license in sight, Texas and Oklahoma protect "RD" by reference to CDR, and Idaho protects both outright. In the other direction, Georgia, Illinois, Florida, Mississippi, Minnesota, Indiana, Michigan, North Carolina and North Dakota expressly permit an unlicensed person to use a lawfully earned RD, RDN or CNS credential, while making clear that the credential confers no right to practice where the practice is reserved.

Which states have changed their dietitian laws since 2021?

Five jurisdictions rewrote or re-enacted their acts in this period. Georgia repealed and re-enacted its Dietetics Practice Act in 2026, creating a two-tier license in which a licensed dietitian may provide medical nutrition therapy for complex and noncomplex conditions and a licensed nutritionist for noncomplex conditions only, protecting "nutritionist" for the first time, and adopting the licensure compact in the same bill. Montana rewrote its act in 2025 with a new scope section and a licensed-nutritionist tier. Nebraska restructured in 2023 and 2024. The District of Columbia rewrote its chapter in 2024, adding telehealth to the scope and resetting the dietitian route to a master's degree. Michigan re-enacted licensure in 2024 after repealing it in 2014, with rules effective April 2026 and a prohibition that starts eighteen months later.

Two states tried and failed. Arizona's legislature passed licensure in 2021 and the governor vetoed it on May 12, 2021. The Senate's fact sheet records that his letter found an occupational license "not necessary to protect the public health and safety". Three later bills died. Colorado's regulator recommended against regulating medical nutrition therapy in December 2024. The legislature passed licenses for dietitians and nutritionists anyway, and the governor vetoed the bill on May 23, 2025. New York's full-licensure bill passed the Senate in June 2026 and sits in the Assembly.

Three states carry expiry dates. Illinois's act is scheduled for repeal on January 1, 2028. New Mexico's board terminates on July 1, 2027, and its act is repealed a year later; the sunset has been pushed back five times since 1989, most recently in 2021. Maryland's Act (Title 5 of its Health Occupations Article) terminates after July 1, 2030, under the state's Program Evaluation Act unless re-established.

Does a dietitian have to carry professional liability insurance?

No state examined makes it a condition of an ordinary in-state license, and two narrower rules apply: Florida requires an out-of-state practitioner who registers to deliver telehealth into the state to "maintain professional liability coverage or financial responsibility", and its registration form requires an attestation of at least $100,000 per claim and $300,000 aggregate; a dietitian is inside that registration scheme because the dietetics part of chapter 468 is named in the telehealth-provider definition. Louisiana requires $100,000 per claim of malpractice insurance not as the price of the license but as the price of qualifying for its malpractice caps, and its inclusion of dietitians is conditional on being "employed by, referred by, or performing work under contract for" another covered provider.

Whether a client in another state needs that state’s license, and where the licensure compact actually stands, is a separate question: see the compact and telehealth across state lines. The Canadian picture, where “dietitian” is restricted everywhere and “nutritionist” in three provinces, is in which words a Canadian dietitian may advertise under.