Roughly 30 states and Washington, D.C. are states where CRNAs can practice independently, meaning the state’s nurse practice act does not require a physician to supervise, direct, or co-sign a Certified Registered Nurse Anesthetist’s clinical decisions. That said, state authority is only one of three layers that determine whether you can actually work without physician oversight. Federal Medicare rules and individual hospital bylaws sit on top of state law, and either one can reimpose supervision even where the state does not.
The Full Practice Authority States
Based on 2026 data, the following states do not require physician supervision for CRNAs:
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Idaho
- Iowa
- Kansas
- Kentucky
- Maine
- Massachusetts
- Michigan
- Minnesota
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Mexico
- North Dakota
- Oklahoma
- Oregon
- South Dakota
- Vermont
- Washington
- West Virginia
- Wisconsin
- Wyoming
Washington, D.C. also grants independent practice authority. The legal path differs by state: some grant authority through the nurse practice act, others through board of nursing regulations, and a few through a mix of statute and gubernatorial action. Maine, Massachusetts, and Michigan adopted full practice authority only within the past few years, and Arizona shifted from a statute that referenced physician direction to a board-of-nursing interpretation that supports independent CRNA practice. Verify your target state’s current rules before committing to a job or relocation.
What Full Practice Authority Actually Grants
In a full-practice-authority state, you can assess patients, develop an anesthesia plan, administer anesthetics, manage recovery, order labs and imaging, and prescribe medications within the anesthesia context on your own professional license. You carry full accountability for those decisions. No law forces a physician to be physically present or available as a condition of your practicing.
Independent practice does not mean working alone. CRNAs still coordinate with surgeons, consult other specialists when the clinical situation calls for it, and follow evidence-based protocols. The legal difference is that the choice to consult is yours, not a statutory precondition.
The Medicare Opt-Out Is a Separate Question
State practice authority and Medicare reimbursement rules run on two different tracks. Federal Medicare regulations require physician supervision of CRNAs in hospitals and ambulatory surgical centers that participate in Medicare, regardless of what the state nurse practice act says. Under 42 CFR 482.52, anesthesia in a Medicare-participating hospital must be provided under the supervision of the operating practitioner or an anesthesiologist who is immediately available, unless the state has obtained an exemption.1eCFR. 42 CFR 482.52 – Condition of Participation: Anesthesia Services
That exemption is the governor opt-out. A state’s governor sends a letter to CMS, after consulting the state boards of medicine and nursing, attesting that opting out is in the best interests of the state’s citizens and consistent with state law. The opt-out takes effect immediately on submission.1eCFR. 42 CFR 482.52 – Condition of Participation: Anesthesia Services
As of 2024, 25 states have exercised this opt-out, along with Guam. Twenty-three of them are full opt-outs: Iowa, Nebraska, Idaho, Minnesota, New Hampshire, New Mexico, Kansas, North Dakota, Washington, Alaska, Oregon, Montana, South Dakota, Wisconsin, California, Kentucky, Arizona, Oklahoma, Michigan, Arkansas, Delaware, Colorado, and Massachusetts. Two are partial: Utah limits its opt-out to Critical Access Hospitals and specified rural hospitals, and Wyoming limits its opt-out to Critical Access Hospitals and hospitals with 25 or fewer licensed beds.
A state can have full practice authority under its own laws but lack a governor opt-out, or the reverse. A CRNA in a private surgical center that does not accept Medicare may not need the opt-out at all. A CRNA in a Medicare-participating hospital in a state without the opt-out faces federal supervision requirements regardless of state law. This is the gap where “independent practice” on paper stops matching independent practice at the bedside.
Hospital Bylaws Can Add Restrictions the State Does Not
Even in a full-practice-authority state, individual hospitals and surgical centers can impose their own supervision requirements through medical staff bylaws, credentialing policies, or internal protocols. A hospital in Colorado can require a physician anesthesiologist to supervise all anesthesia cases as a condition of CRNA privileges at that facility, though Colorado law does not require it.
These facility-level restrictions are legal. Hospitals set their own clinical practice standards through medical staff governance, and those standards can exceed what state law and accreditation bodies require. The AANA has acknowledged that facility bylaws often impose supervision beyond what regulations demand and has encouraged CRNAs to work through the bylaws amendment process to change them.
Before accepting a position, read the facility’s bylaws and credentialing requirements. A state that looks permissive on a practice-authority map can feel very different inside a hospital that layers on its own supervision mandates. Rural and critical-access hospitals tend to be more CRNA-friendly on this front, partly because they may not have anesthesiologists on staff.
States That Still Require Physician Involvement
Roughly 20 states maintain some form of mandatory physician involvement. The specifics vary. Some require direct supervision, meaning a physician must be physically present or immediately available during anesthesia administration. Others use a collaborative practice agreement model, requiring a written agreement with a physician that defines the CRNA’s scope. A few use softer language like “direction” or “coordination” without requiring the physician to be on-site.
States commonly identified as requiring supervision or collaboration include Alabama, Florida, Georgia, Illinois, Indiana, Louisiana, Mississippi, Missouri, New Jersey, New York, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, and Virginia. Alabama’s law is particularly restrictive, requiring CRNAs to function under the direction of a physician or dentist who is “immediately available.”
These requirements sit in the state’s nurse practice act, medical practice act, or both. In some states, the medical board and nursing board have overlapping jurisdiction over CRNA practice, which can produce conflicting interpretations. If you practice in one of these states, the exact statutory language matters. “Supervision” and “collaboration” carry different legal weight, and the distinction affects how far away the physician can be and whether a formal written agreement must be on file.
Federal Facilities Follow Their Own Rules
Federal regulations preempt conflicting state laws when you are working within the scope of federal employment, so federal facilities can either expand or restrict your practice compared to your state.
Veterans Affairs Medical Centers
The VA’s 2016 final rule granted full practice authority to three categories of advanced practice registered nurses but explicitly excluded CRNAs. The VA’s stated reason was that it did not face access problems in anesthesiology at the time.2Federal Register. Advanced Practice Registered Nurses CRNAs already licensed for independent practice by their state can continue that way within the VA, but CRNAs in restrictive states do not gain additional authority through VA employment the way nurse practitioners do. Legislation introduced in 2025, the Ensuring Veterans Timely Access to Anesthesia Care Act, would require the VA to recognize CRNAs as licensed independent practitioners.3Congress.gov. Ensuring Veterans Timely Access to Anesthesia Care Act of 2025
Military Treatment Facilities
Within the Department of Defense health system, CRNAs deliver a large share of anesthesia care, especially in deployed and operational settings. The Defense Health Agency’s Administrative Instruction 6025.07 establishes practice standards for military CRNAs, who generally exercise broader autonomy than many state laws would permit because federal preemption applies.
How to Verify Your State’s Current Rules
CRNA practice authority is a moving target. Between 2020 and 2025, several states expanded CRNA autonomy through legislation, gubernatorial opt-outs, or board-of-nursing regulatory changes. A list accurate today can be outdated within months.
Start with your state’s board of nursing, which publishes the current nurse practice act and any administrative rules on CRNA scope of practice. Cross-reference the state legislature’s website for recently enacted bills, since some take effect on a delayed schedule. The American Association of Nurse Anesthesiology maintains an interactive state-by-state map at aana.com that tracks both practice authority and opt-out status. If you work in a Medicare-participating facility, confirm separately whether your state’s governor has submitted an opt-out letter, because that federal layer operates independently from your state’s practice act.