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CRNA Supervision Requirements By State

Certified registered nurse anesthetists (CRNAs) provide most of the anesthesia care in rural America. The American Association of Nurse Anesthesiology (AANA) …

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Certified registered nurse anesthetists (CRNAs) provide most of the anesthesia care in rural America. The American Association of Nurse Anesthesiology (AANA) reports that CRNAs are the primary anesthesia providers in a majority of rural counties, and many rural hospitals run CRNA-only anesthesia to keep their general surgery and obstetrics departments open.

Supervision rules are more complicated than a single map suggests. Around 25 states, plus Washington, D.C., and Guam, have opted out of the federal Medicare requirement that a physician supervise CRNAs (Massachusetts was the most recent, in 2024). But opting out of the Medicare rule is not the same as full practice authority. Each state's nurse practice act still defines what a CRNA can do, and your employer's care model often matters more than either.

CRNA Supervision by Care Model

Whether your state lets CRNAs work independently may matter less than how much independence your employer actually gives you. CRNAs in Maryland are not authorized to practice independently, yet Johns Hopkins uses a collaborative model. CRNAs in Minnesota can practice independently, yet Mayo Clinic uses the anesthesia care team model.

Anesthesia practices generally follow one of four models: physician only, anesthesia care team, collaborative care, and CRNA only. The main difference between collaborative care and the anesthesia care team model is how involved the anesthesiologist is and how the work is billed.

CRNA-only model

These practices do not employ anesthesiologists. CRNAs plan and deliver all anesthesia care, practice independently, and bill independently. You will find this model in outpatient surgery centers and physicians' offices, and in rural hospitals handling obstetrics, pain management, and general surgery.

Collaborative care model

CRNAs can consult anesthesiologists on the team but retain broad responsibility to plan and deliver care, and they bill as independent providers.

Anesthesia care team (ACT) model

An anesthesiologist medically directs two to four CRNAs at a time. Medical direction is a billing arrangement: both the anesthesiologist and the CRNA can collect payment as long as the anesthesiologist meets seven documentation requirements for each case.

In large hospital systems and teaching hospitals, anesthesiologists may not meet all seven requirements on every case they oversee. CRNAs in those settings often work under a mix of collaborative and ACT arrangements even when the team prefers ACT. How much supervision you experience on a given case comes down to staffing ratios, workload, and resources.

CRNA Supervision by Practice Setting

As a rule, the larger the setting, the larger the anesthesia team and the more supervision you will encounter.

CRNAs in large health systems and teaching hospitals usually work on an anesthesia care team under the ACT model, billed through medical direction. Outpatient surgery centers are a different world. CRNAs there typically work independently and are often the only anesthesia provider on shift, covering settings like plastic surgery, eye, dental, and gastrointestinal centers. In states without full practice authority, the operating surgeon may serve as the supervising physician, an arrangement many CRNAs note makes little clinical sense given that the surgeon has less anesthesia expertise than they do.

Community and rural hospitals lean on collaborative or CRNA-only care depending on location, team size, and caseload. Rural hospitals have shifted toward CRNA-only models in recent years, with CRNAs handling routine general surgery, obstetrics, and pain management. The AANA reports that CRNAs are the predominant obstetric anesthesia providers in many rural hospitals, which lets those hospitals keep their departments open and cut travel time for patients.

What This Means for You

Supervision rules are easy to misread from the outside, and the debate between the American Society of Anesthesiologists and the AANA adds noise. The most reliable read comes from CRNAs who have worked across different models. Network with them, then try settings yourself and decide what fits.

When you interview, find current employees in different departments who will talk candidly about the team you would join, because your employer holds the most sway over your day-to-day independence. Before you sign a contract, it is worth asking:

Other CRNAs: what they think of their role, the work they do, and the anesthesiologists they work with.

The interviewer: which care model the team uses, who you report to, and how you are paid.

PACU nurses, surgeons, surgical nurses, or critical care nurses: how well the anesthesia team actually works together.

Frequently Asked Questions

What is CRNA supervision? It is an arrangement where an anesthesiologist oversees one or more CRNAs. The anesthesiologist can medically direct the CRNAs (if billing requirements are met) or supervise more loosely, depending on the team's workload and resources.

Which states have opted out of CRNA supervision? Roughly 25 states, plus Washington, D.C., and Guam, have opted out of the federal Medicare physician-supervision requirement, with Massachusetts the most recent. Because the list changes and varies by source, confirm current status through the NCSBN and your state board of nursing.

Can CRNAs practice fully independently right away? Opting out of the Medicare rule is not the same as state-granted full practice authority. Some states require newly licensed CRNAs to complete a period of supervised practice before practicing independently, so check your specific state's nurse practice act.

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