IN THIS GUIDE · A registered nurse whose TN turns on licensing and health-care certification
Start with the TN eligibility and application overview
The profession's own credential rule is a licence, not only a degree
For Registered Nurse the USMCA list accepts a state or provincial licence or a Licenciatura degree. Karina's Ontario registration satisfies the professional-list wording, but many U.S. employers and states will not let her practise until she holds that state's licence or a temporary permit. The immigration question and the practice question are separate: she may be admissible under the treaty with her Ontario licence, and still unable to start work on the ward. The employer's letter should be honest about which licence she will hold on day one. The practical decision is whether the written role matches the listed profession before anyone books travel. A title that sounds right cannot repair duties that are chiefly sales, general operations or trades work.
Health-care worker certification is a separate admission requirement
Federal regulation requires nurses and several other health occupations to present a certificate from an approved credentialing organization at admission, confirming education, licensure, English ability and, for nurses, passage of a recognized examination. Officers at the port of entry can refuse a TN nurse who cannot show it, even with a perfect employer letter. Ordering this certificate is often the slowest step in the whole process, so Karina should start it before the contract is finalized. Keep the employer letter, supporting credentials and any professional authorization consistent on dates, location and supervisor. Contradictory start dates or a missing signatory commonly lead to follow-up questions.
The employer letter should describe nursing duties, not an expanded role
Hospitals sometimes describe a role as charge nurse plus unit education plus quality coordination. Additional duties are not fatal, but the letter should make clear that the position is professional nursing at a level requiring the credential, with the extra responsibilities incidental to it. A letter that reads like an administrative or management job invites the officer to ask whether the profession named is really the one being filled. Where a licence is still pending, distinguish authorization to practise from an application receipt. The file should say which tasks begin only after the required state authorization is issued.
Ownership in a staffing agency changes the analysis
If Karina's contract came through an agency in which she or her family hold shares, that stake must be disclosed and examined. TN does not permit self-employment in the United States, and an arrangement in which the applicant effectively controls the entity sending her to a hospital can be treated as self-employment even with a third-party worksite. A plain employee relationship with either the hospital or an independent agency avoids the issue. A USCIS petition can be useful when a written classification decision is needed in advance, but it does not change the underlying professional, temporary-work and non-self-employment tests.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.