Certified registered nurse anesthetists (CRNAs) are advanced practice nurses who administer anesthesia for surgeries, labor and delivery, and other medical procedures. They perform many of the same functions as physician anesthesiologists: evaluating patients before surgery, delivering the anesthesia, monitoring vital signs throughout the procedure, and managing pain during recovery. In 25 U.S. states, CRNAs practice independently without physician supervision, and in many rural communities they are the sole anesthesia providers.
What CRNAs Do Before, During, and After Surgery
A CRNA’s work starts well before a patient enters the operating room. During the pre-anesthesia visit, they review your medical history, previous experiences with anesthesia, and current medications. They perform a focused physical exam to identify anything that could affect how you respond to anesthesia, such as airway anatomy, heart conditions, or allergies. Based on that assessment, they order any necessary lab tests, choose the anesthesia plan, and make sure you’ve given informed consent.
Once in the operating room, the CRNA induces anesthesia, which means administering the drugs that put you to sleep or numb the targeted area. From that point forward, they continuously monitor your heart rate, blood pressure, oxygen levels, and breathing. They adjust medications in real time to keep you stable, comfortable, and at the right depth of sedation throughout the procedure. If something unexpected happens, like a sudden drop in blood pressure or an airway complication, the CRNA responds immediately.
After surgery, CRNAs manage what’s called emergence: the process of safely waking you up and ensuring you can breathe on your own. They also handle postoperative pain control, which can include nerve blocks, epidurals, or other pain management techniques. For many patients, the CRNA is the person they interact with most on the day of surgery.
Types of Anesthesia CRNAs Provide
CRNAs are trained to deliver every type of anesthesia used in modern medicine. General anesthesia, where you’re fully unconscious, is the most complex and is used for major surgeries. Regional anesthesia, like spinal blocks or epidurals, numbs a large section of the body and is common during cesarean deliveries and orthopedic procedures. Local anesthesia with sedation keeps you relaxed and pain-free for shorter procedures like colonoscopies or dental surgery.
Their scope extends beyond operating rooms. CRNAs provide anesthesia in labor and delivery units, emergency departments, pain management clinics, dental offices, and outpatient surgery centers. They also manage acute and chronic pain through techniques like epidural injections and nerve blocks.
Where CRNAs Work
Most CRNAs work in hospitals and ambulatory surgical centers, but their impact is especially significant in underserved and rural areas. Research published in Nursing Outlook found that CRNAs provide obstetric anesthesia in rural communities, low-volume delivery hospitals, and areas with more vulnerable populations. In many of these settings, CRNAs practice without physician direction simply because no anesthesiologist is available. Without them, some communities would have no access to anesthesia services or safe surgical births at all.
In larger hospitals and academic medical centers, CRNAs often work alongside anesthesiologists in what’s called a care team model. In this arrangement, an anesthesiologist may oversee several cases while CRNAs manage individual patients directly. The specific model depends on hospital policy, state law, and patient needs.
Independent Practice and State Regulations
Whether a CRNA needs physician supervision depends on state law. As of 2024, 25 states have opted out of the federal Medicare requirement for physician supervision of nurse anesthetists. These include California, Colorado, Massachusetts, Michigan, and others spanning every region of the country. Some states, like Utah and Wyoming, have partial opt-outs limited to critical access hospitals and small rural facilities.
In opt-out states, CRNAs can evaluate patients, develop anesthesia plans, administer anesthesia, and manage recovery entirely on their own. Multiple large-scale studies have examined whether this independence affects patient safety. An analysis of over 400,000 cases found that mortality rates for CRNAs working alone (0.45%) and anesthesiologists working alone (0.41%) were nearly identical. A separate study of hospital-level data found anesthesia complication rates of 0.23% at CRNA-only hospitals compared to 0.27% at anesthesiologist-only hospitals, a difference that was not statistically significant. Research spanning 1999 to 2005 also found that solo CRNAs in opt-out states showed no increase in adverse outcomes compared to states requiring supervision.
Education and Training Requirements
Becoming a CRNA requires more training than almost any other nursing specialty. The path starts with a bachelor’s degree in nursing and an active registered nurse license. After that, you need a minimum of one year of full-time critical care experience, typically in an intensive care unit where you manage ventilators, administer powerful medications, and care for the most unstable patients. Many applicants have two or more years of ICU experience before they’re competitive for admission.
Nurse anesthesia programs now require a doctoral degree for entry into practice. As of March 2026, all accredited programs award doctoral degrees. These programs typically take three to four years and include extensive clinical rotations where students administer anesthesia under supervision across a wide range of surgical specialties and patient populations. The total timeline from starting a nursing degree to becoming a CRNA is roughly 8 to 11 years, depending on the path.
After graduation, CRNAs must pass a national certification exam administered by the National Board of Certification and Recertification of Nurse Anesthetists (NBCRNA). To maintain their credential, they renew every four years and complete continuing education requirements, including 60 credits in core anesthesia education and 40 credits in professional development. A midpoint check-in verifies active licensure and practice status.
Salary and Job Growth
CRNAs are among the highest-paid nursing professionals in the United States. The median annual salary was $223,210 in May 2024, according to the Bureau of Labor Statistics. Pay varies by region, practice setting, and whether the CRNA works independently or within a care team, but even entry-level positions typically pay well above $150,000.
The job market is strong and expected to stay that way. The BLS projects 9% growth for nurse anesthetists between 2024 and 2034, which translates to roughly 4,600 new positions added to the current workforce of about 53,800. Demand is driven by an aging population needing more surgeries, ongoing shortages of anesthesia providers in rural areas, and expanding scopes of practice in more states.