Guide — RT Career & Professional Practice
RT Licensure & Scope of Practice
A national credential proves competence; a state license grants the legal right to practice. This guide explains RT licensure, how it differs from credentialing, and where a respiratory therapist’s scope of practice is actually defined.
7 min read · RT Career & Professional Practice
Written by Apex Respiratory Editorial Team
Educational use only. This material supports respiratory therapy education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional protocols, or physician orders. Always follow facility policies and current provider orders, and verify calculations independently before clinical use.
Overview
Two separate things allow a respiratory therapist to practice legally: a national credential and a state license. The credential — either the CRT (Certified Respiratory Therapist) or RRT (Registered Respiratory Therapist) issued by the National Board for Respiratory Care (NBRC) — demonstrates clinical competence through a standardized examination process. The state license is the legal authorization granted by a state government that permits practice within that jurisdiction.
Nearly all U.S. states require licensure to practice respiratory care. Holding an NBRC credential is typically a prerequisite for state licensure, but the credential alone does not authorize practice — both are required.
Key Concepts: Licensure
State licensure requirements vary but generally share a common structure:
- NBRC credential requirement. Most states require applicants to hold at least the CRT; an increasing number require the RRT for full licensure.
- Application and fee. Candidates submit a state application, documentation of credentials, and a licensing fee to the relevant state board or agency.
- Continuing education and renewal. Licenses are not permanent — they must be renewed on a regular cycle (commonly every one to two years) and typically require completing continuing education hours.
- State specificity. A license issued by one state does not automatically authorize practice in another state. Working across state lines generally requires obtaining licensure in each state where care is provided.
Where Scope of Practice Comes From
An RT’s scope of practice is not determined by any single document or organization — it emerges from the intersection of several overlapping sources. Understanding each one helps clarify what an RT may legally and professionally do in a given setting.
| Source | Role in Defining Scope |
|---|---|
| State Practice Act / Licensure Law | Legal foundation — defines what respiratory care means in that state and who may perform it. |
| Institutional Policy & Medical Direction | Facility-level rules and physician oversight that determine day-to-day authorized activities. |
| AARC Scope-of-Practice Statements | Professional standards describing the breadth of respiratory care practice nationally. |
| Physician / Provider Orders & Protocols | Case-by-case or standing authorization for specific therapies and adjustments. |
In practice, RTs work under medical direction — meaning a licensed physician or provider is responsible for the overall plan of care. Institutional policies and protocols then establish which specific activities RTs are authorized to perform within that facility.
Protocols & Medical Direction
RT-driven protocols represent a formalized extension of scope within physician-approved boundaries. A protocol is a standing order — approved by the medical staff — that authorizes respiratory therapists to initiate, adjust, or discontinue specific therapies based on defined patient criteria, without requiring an individual physician order for each decision.
Common protocol examples include ventilator weaning protocols, oxygen titration protocols, and bronchodilator assessment protocols. These allow RTs to respond efficiently to changing patient conditions while remaining within the bounds of medical direction and institutional approval.
Important distinction. Protocols expand practical scope within pre-approved limits — they do not remove the requirement for medical direction. All RT-driven protocols must be authorized by the facility’s medical staff and remain subject to physician oversight.
Common Pitfalls
- Assuming the credential alone authorizes practice. An NBRC credential (CRT or RRT) demonstrates competence but does not grant a legal right to practice — a valid state license is also required.
- Practicing in an unlicensed state. Working in a state where you do not hold an active license — even temporarily — is practicing without authorization and carries legal risk.
- Exceeding defined scope. Performing activities not authorized by the state practice act or institutional policy — even if clinically reasonable — falls outside the RT’s legal scope of practice.
- Letting the license lapse. Missing renewal deadlines or failing to complete required continuing education can result in an expired license, making further practice unauthorized until reinstatement.
Key Takeaways
- Credential and license are not the same. The NBRC credential certifies competence; the state license authorizes practice. Both are required.
- Licenses are state-specific. A license in one state does not authorize practice in another — separate licensure is required for each state.
- Scope is set by multiple sources. The state practice act provides the legal foundation, but institutional policy, medical direction, AARC standards, and physician orders all shape what an RT actually does in practice.
- Protocols operate within, not outside, scope. RT-driven protocols allow independent action within physician-approved boundaries — they do not replace or override medical direction.
FAQ
What is the difference between an NBRC credential and a state license?
An NBRC credential (CRT or RRT) is a national certification that demonstrates clinical competence — it is awarded by the National Board for Respiratory Care after passing the required exam(s). A state license is a legal authorization granted by a state government that permits you to practice respiratory care within that state. The credential proves what you know; the license grants the legal right to practice. Both are typically required.
Do I need a license in every state where I practice?
In most cases, yes. Licensure is state-specific, so practicing respiratory care in a given state generally requires holding a valid license issued by that state. If you relocate or work across state lines, you will typically need to obtain licensure in each state where you provide care. Requirements and processes vary by state, so check the relevant state licensing board directly.
What actually defines an RT’s scope of practice?
An RT’s scope of practice is shaped by several overlapping sources: the state practice act and licensure law (the legal foundation), institutional policy and medical direction (what a facility permits), the AARC’s definition of respiratory care and scope-of-practice statements (professional standards), and physician or provider orders and protocols (case-by-case authorization). No single source defines scope on its own — all of these work together.
What are RT-driven protocols and how do they fit into scope of practice?
RT-driven protocols are physician-approved standing orders that authorize respiratory therapists to initiate, adjust, or discontinue specific therapies — such as ventilator weaning, oxygen titration, or bronchodilator assessment — based on defined patient criteria. Protocols expand practical scope within pre-approved boundaries and reduce the need for individual physician orders for routine adjustments, while still operating under medical direction.
Go deeper
A license defines what you may do; your setting defines what you do day to day. See where the credential leads.
Explore RT roles & work settings →Related Resources
Sources
- American Association for Respiratory Care. Position statements on the definition and scope of respiratory care practice. AARC.
- Kacmarek RM, Stoller JK, Heuer AJ. Egan's Fundamentals of Respiratory Care. 12th ed. Elsevier; 2021. The respiratory care profession.