An APRN, or Advanced Practice Registered Nurse, is a registered nurse with graduate-level education and training who can diagnose conditions, order tests, and prescribe medications. APRNs fill a role between a standard registered nurse and a physician, handling many of the same responsibilities you’d associate with a primary care doctor while bringing a nursing-centered approach to patient care. The median annual salary for APRNs was $132,050 in 2024, and employment in these roles is projected to grow 35 percent over the next decade, making it one of the fastest-growing careers in healthcare.
What APRNs Actually Do
A standard registered nurse carries out care plans, administers medications, and monitors patients, but cannot independently diagnose diseases or prescribe treatments. An APRN can do all of that. Depending on the state, APRNs evaluate patients, diagnose conditions, order and interpret lab work and imaging, start treatment plans, and prescribe medications including controlled substances. In many settings, their day-to-day work looks similar to that of a primary care physician.
APRNs are licensed at the state level and must hold national board certification in their area of practice. They can work in hospitals, private clinics, specialty offices, community health centers, and in some states, they run their own independent practices.
The Four Types of APRNs
The APRN title covers four distinct roles, each with its own focus and patient population.
Nurse Practitioners (NPs)
Nurse practitioners are the most common type of APRN. They can prescribe medications in all 50 states, and in just under half of states, they have full practice authority, meaning they can run their own practice without physician oversight. NPs choose a population focus during their graduate training, and their specialties include family practice (caring for patients across all ages), psychiatric mental health (assessing and treating behavioral and emotional conditions), women’s health (managing reproductive and gynecological care), and acute care (treating patients with critical, chronic, or complex conditions in hospital settings). In many communities, a family nurse practitioner serves the same function as a primary care physician.
Certified Registered Nurse Anesthetists (CRNAs)
CRNAs administer anesthesia for surgeries and procedures. They work in operating rooms, dental offices, and pain management clinics, and in many rural hospitals they are the primary anesthesia providers.
Certified Nurse-Midwives (CNMs)
Nurse-midwives provide prenatal care, deliver babies, and manage postpartum and reproductive health. They practice in hospitals, birthing centers, and home birth settings.
Clinical Nurse Specialists (CNSs)
Clinical nurse specialists focus on improving care within a specific patient population or hospital unit. They combine direct patient care with systems-level work, developing treatment protocols and mentoring nursing staff. Their specialties range from cardiology to oncology to pediatrics.
Education and Training Requirements
Becoming an APRN requires significantly more education than becoming a registered nurse. The path starts with earning a Bachelor of Science in Nursing and obtaining an active RN license. From there, candidates must complete a graduate program, either a master’s degree or a doctoral degree in nursing, focused on their chosen APRN role. These programs typically take two to four years and combine evidence-based coursework with clinical rotations in the student’s specialty area.
After finishing their graduate program, APRNs must pass a national board certification exam specific to their population focus. A nurse practitioner trained in family medicine, for example, sits for a family practice certification exam. These exams test both general advanced practice knowledge and specialty-specific clinical competencies. Certification is not optional: it’s required for state licensure and for credentialing with insurance companies.
NP programs generally require 500 to 750 clinical hours during training. That’s far less than the 12,000 to 16,000 patient-care hours physicians accumulate through medical school rotations and three to seven years of residency. This difference in training depth is one reason scope-of-practice debates remain active in healthcare policy.
How APRNs Compare to Physicians and RNs
The simplest way to think about these three roles is as a spectrum of clinical independence. An RN provides hands-on care under a physician’s or APRN’s direction but doesn’t diagnose or prescribe. An APRN independently diagnoses, treats, and prescribes within their scope, either on their own or in collaboration with a physician depending on state law. A physician completes the most extensive training and has the broadest scope of practice, including performing complex procedures and managing the most severe cases.
Research comparing NP-led and physician-led primary care shows that clinical outcomes are generally comparable for common and mild conditions. Both NPs and physicians are effective at managing chronic diseases, preventive care, and patient education. Patients actually report higher satisfaction with NP care in many studies. Where differences emerge is in complex or severe cases: physicians tend to achieve better outcomes with advanced procedures, severe psychiatric conditions, and multi-system diseases. This tracks with the difference in training depth between the two roles.
Scope of Practice Varies by State
One of the most important things to understand about APRNs is that their authority depends heavily on where they practice. States fall into three categories.
- Full practice states allow NPs to evaluate, diagnose, order tests, and prescribe medications, including controlled substances, entirely under the authority of the state board of nursing. No physician agreement is required.
- Reduced practice states require NPs to maintain a collaborative agreement with a physician throughout their career in order to perform at least one element of their practice.
- Restricted practice states require ongoing physician supervision, delegation, or team management for NPs to provide patient care.
If you’re seeing an APRN for care, the practical difference between these categories is mostly behind the scenes. In a full practice state, your NP may be the sole provider at a clinic. In a restricted state, a collaborating physician reviews charts or is available for consultation, though you may never interact with that physician directly.
Prescribing Authority and Controlled Substances
APRNs can prescribe medications in every state, but the rules around controlled substances (painkillers, stimulants, sedatives, and similar drugs) vary. To prescribe controlled substances, an APRN must be authorized by their state and registered with the DEA as a mid-level practitioner. The DEA classifies nurse practitioners, nurse-midwives, nurse anesthetists, and clinical nurse specialists alongside physician assistants in this category. The specific drugs an APRN can prescribe, and whether they need a collaborative physician’s sign-off, depends on state law.
Where APRNs Work
APRNs practice in nearly every healthcare setting. Family and psychiatric NPs are common in primary care offices, urgent care clinics, and telehealth platforms. Acute care NPs work in hospital units, emergency departments, and intensive care. CRNAs are found in surgical centers and hospitals. CNMs work in obstetric units, birthing centers, and community clinics. Clinical nurse specialists tend to work within hospital systems, shaping care protocols for specific departments.
In rural and underserved areas, APRNs are often the primary or only healthcare providers available. The projected 35 percent job growth over the next decade is driven partly by this demand, as healthcare systems look to expand access in communities that struggle to recruit physicians.