Licensed practical nurses (LPNs) work under the direction of a registered nurse, physician, or other authorized provider and cannot practice independently. This single distinction shapes everything an LPN is and isn’t allowed to do. While LPNs handle a wide range of hands-on patient care, several critical clinical activities fall outside their legal scope of practice, and the specifics vary somewhat by state.
Independent Practice and Decision-Making
The most fundamental restriction is that LPNs cannot practice nursing independently. Every aspect of an LPN’s work happens under the direction of an RN, physician, physician assistant, dentist, or advanced practice nurse. This isn’t just a workplace policy. It’s written into nursing law. An LPN also cannot supervise or direct the practice of a registered nurse, though they can share knowledge with other LPNs, certified nursing assistants, and unlicensed staff when directed by an RN.
LPNs cannot prescribe medications, order diagnostic tests, or independently order treatments. If a patient’s situation changes in a way that falls outside existing orders, the LPN must consult with an RN or authorized provider rather than making independent clinical decisions.
Assessment vs. Data Collection
This distinction trips up a lot of people because it sounds like semantics, but it carries real legal weight. LPNs can collect data: taking vital signs, observing symptoms, recording what a patient reports. What they cannot do is perform a formal nursing assessment, which involves interpreting that data, identifying clinical problems, and formulating a nursing diagnosis.
An LPN and an RN might both check a patient’s neurological status using the same physical techniques. The difference is what happens next. The RN interprets and synthesizes the findings, decides what the data means clinically, and determines what interventions are needed. The LPN reports what they observed to the RN, who holds overall responsibility for verifying the data, interpreting it, and making diagnostic judgments. In practical terms, this means an LPN cannot be the sole nurse responsible for determining whether a patient’s condition is deteriorating or stable.
Care Planning and the Nursing Process
Nursing care follows a structured process: assessment, diagnosis, planning, implementation, and evaluation. LPNs participate in every step, but their role at each stage is limited and dependent on RN oversight.
LPNs contribute valuable input during assessment and can help gather the information needed for care planning. But they cannot independently develop a nursing care plan or modify one without RN review. They can propose changes to a plan of care, but an RN or other authorized provider must approve those changes. They also cannot formulate nursing diagnoses, which are the clinical judgments that drive the entire care plan. The RN retains responsibility for creating, interpreting, and updating the plan based on ongoing evaluation.
IV Medications and Blood Products
IV therapy is one of the most commonly restricted areas for LPNs, though the exact rules depend heavily on your state. In many states, LPNs can start peripheral IV lines, adjust flow rates, and administer IV medications through piggyback (a secondary bag that drips alongside the main IV fluid). But pushing medication directly into a vein, known as IV push, is broadly prohibited for LPNs.
Some states allow facilities to apply for special approval to let LPNs give IV push medications under strict conditions. In Alabama, for example, a facility must submit a formal application to the Board of Nursing, and an RN must be physically present and immediately available any time an LPN performs IV push therapy. The LPN must also complete additional training and demonstrate clinical competence. Blood product administration follows a similar pattern: prohibited by default, potentially allowed with board approval and extra training.
With or without special approval, LPNs generally cannot manage central line devices. This includes flushing central venous or arterial lines, changing dressings on central access sites, and zeroing arterial lines for pressure monitoring.
Triage and Telephone Advice
LPNs can perform triage when an appropriately trained RN or authorized provider is directing the process. What they cannot do is triage patients independently or make autonomous decisions about the urgency and priority of patient complaints.
This becomes especially relevant in telephone triage, where a nurse takes calls from patients and decides what level of care they need. If the patient’s situation falls outside a standing order or protocol, the LPN cannot modify the plan or improvise a response. They must consult with an RN or provider before proceeding. In settings where nurses give medical advice over the phone, LPNs typically work from scripts or standing orders with an RN available for anything that falls outside those parameters.
Critical Care and High-Acuity Settings
ICUs and emergency departments present the sharpest limits on LPN practice. The American Association of Critical-Care Nurses outlines a detailed list of tasks that fall outside LPN scope in these environments:
- Assessments and reassessments: Only RNs can perform the ongoing clinical assessments that critically ill patients require.
- Central access devices: Flushing, zeroing, and dressing changes on central venous and arterial lines are RN-only tasks.
- IV push medications and blood products: Both are prohibited in critical care settings.
- Titrating medication drips: Adjusting the rate of continuous IV infusions, such as those used to control blood pressure or sedation, requires RN-level clinical judgment.
- Inserting feeding tubes or nasogastric tubes: These procedures fall outside LPN scope in critical care.
- Initiating patient education: While LPNs can reinforce education an RN has started, they cannot independently initiate the educational plan.
- Monitoring abdominal pressure and flushing specialty tubes: Tasks like flushing nephrostomy tubes or thoracic drainage tubes are restricted to RNs.
Some hospitals do integrate LPNs into ICU teams in support roles, but the RN remains responsible for all assessment, care planning, and high-risk interventions.
Why Restrictions Vary by State
Nursing practice is regulated at the state level, which means what an LPN can legally do in one state may be off-limits in another. Each state’s Board of Nursing defines its own scope of practice, and facilities can sometimes apply for expanded privileges with additional training requirements and oversight protocols. If you’re an LPN (or considering becoming one), your state board’s website is the definitive source for what’s allowed in your jurisdiction. The core restrictions around independent practice, nursing diagnosis, and care plan development are consistent nationwide, but IV therapy, triage, and specific procedural tasks vary enough that assumptions based on one state’s rules can get you into trouble in another.