Across the United States, roughly 20 states and the District of Columbia give Certified Registered Nurse Anesthetists full independent prescriptive authority, about 19 more allow prescribing only under a collaborative agreement with a physician, and the remaining states do not authorize CRNAs to write prescriptions at all beyond administering anesthesia drugs during a procedure. So the honest answer to the question of which states CRNAs have prescriptive authority in is: most of them, but the conditions attached change everything about what that authority is worth day to day.
What Prescriptive Authority Means for a CRNA
Every CRNA administers medications during surgery and other procedures requiring anesthesia. That is the core of the job and does not depend on prescriptive authority. Prescriptive authority is a separate legal power: writing prescriptions a patient fills at a pharmacy, whether for post-surgical pain management, anti-nausea medication after discharge, or other drugs related to anesthesia care. In some states the same authority covers ordering durable medical equipment.
The country sorts into three groups. Full independent authority means the CRNA prescribes on their own judgment, with no physician co-signing or overseeing the decision. Collaborative authority means the CRNA can prescribe, but only under a formal arrangement with a physician that defines what the CRNA is allowed to do. No authority means the CRNA must rely on a physician to write any prescription a patient would fill outside the operating room.
States With Full Independent Prescriptive Authority
The following states and the District of Columbia currently recognize full independent prescriptive authority for CRNAs: Alaska, Colorado, Connecticut, Hawaii, Idaho, Iowa, Kansas, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Mexico, North Dakota, Oregon, Rhode Island, Utah, Vermont, Washington, and Wyoming.
Kansas is a recent addition. In 2025, the state enacted Senate Bill 67, which amended existing law to authorize CRNAs to prescribe any drugs consistent with their education, training, and qualifications. The legislation also covers procurement of durable medical equipment.
Independent does not always mean unconditional. Several of these states arrived at full authority through incremental changes, and their statutes may still carry requirements like minimum continuing education hours or notice to the board of nursing about prescribing practices. The defining feature of the group is simply that no physician signs off on the prescription.
States Requiring a Collaborative Agreement
A larger group allows CRNAs to prescribe only through a collaborative practice agreement or similar physician relationship. Those states are Arizona, Arkansas, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Missouri, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, West Virginia, and Wisconsin.
What the agreement actually requires varies by state and often by individual contract. Common elements include:
- Formulary restrictions that limit which drugs the CRNA can prescribe, sometimes excluding certain controlled substance schedules entirely.
- Chart review requirements under which the physician must review a percentage of the CRNA’s prescribing decisions at set intervals.
- Geographic proximity rules requiring the collaborating physician to be available within a certain distance or response time.
- Transition-to-practice periods that require new CRNAs to complete a set number of supervised hours before prescribing, even under a collaborative agreement.
Collaborative agreements carry real costs. CRNAs in these states often pay the collaborating physician an annual fee, ranging from several thousand dollars to well over ten thousand depending on the state and the physician’s willingness to participate. Finding a willing collaborator can itself be a barrier, particularly in rural areas where physicians are scarce.
States Where CRNAs Have No Prescriptive Authority
Several states do not grant CRNAs any prescriptive authority beyond the direct administration of anesthesia drugs. They are Alabama, California, Maine, Maryland, Michigan, Mississippi, New Jersey, New York, North Carolina, South Dakota, and Virginia.
In these states, CRNAs administer medications as part of an approved anesthesia plan or under physician direction during procedures, but they cannot independently write a prescription for a patient to fill at a pharmacy. If a patient needs a post-discharge prescription for pain medication or an antiemetic, a physician or another provider with prescriptive authority has to write it.
DEA Registration and Controlled Substances
Even in a full-authority state, prescribing controlled substances triggers additional federal requirements. The Drug Enforcement Administration classifies CRNAs as mid-level practitioners and requires a separate DEA registration before any controlled substance can be prescribed.
The registration has a prerequisite: the CRNA must already have authority to dispense controlled substances under the laws of the state where they practice. DEA registration does not create prescriptive authority; it sits on top of whatever the state has granted. CRNAs apply using DEA Form 224, which covers practitioners and mid-level practitioners, and the registration is valid for three years.
A separate registration is required at each principal place of business where the CRNA prescribes controlled substances. A CRNA who prescribes at two hospitals and an outpatient clinic would need three registrations. Some states also impose their own controlled substance registration on top of the DEA requirement, and many limit which schedules CRNAs can prescribe. A state may grant prescriptive authority for Schedule III through V drugs but prohibit CRNAs from prescribing Schedule II substances like oxycodone or fentanyl for outpatient use. A CRNA moving between states needs to check the specific schedule rules in each jurisdiction.
Medicare Opt-Out Is Not Prescriptive Authority
Federal Medicare rules add a layer that is easy to confuse with state prescriptive authority but operates independently. Hospitals and other facilities participating in Medicare must generally require physician supervision of CRNAs providing anesthesia services. A state’s governor can submit a letter to the Centers for Medicare and Medicaid Services opting out of that supervision requirement.
As of 2026, 25 states and Guam have opted out: Alaska, Arizona, Arkansas, California, Colorado, Delaware, Idaho, Iowa, Kansas, Kentucky, Massachusetts, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Utah, Washington, Wisconsin, and Wyoming. Some are partial opt-outs limited to critical access hospitals and small rural facilities.
The opt-out is about whether a physician must be physically present or immediately available during anesthesia care in Medicare facilities. It is not about writing prescriptions. California and South Dakota, for instance, have opted out of the Medicare supervision requirement but still do not grant CRNAs any prescriptive authority. A CRNA can practice in an opt-out state and still lack the ability to send a patient home with a prescription.
How to Confirm Your State’s Current Rules
State laws governing CRNA practice change regularly, and the details matter for anyone whose livelihood depends on getting them right. The most reliable starting points are the official website of your state’s board of nursing, which publishes current administrative rules and any required application forms, and your state legislature’s website, where you can read the actual statutes. The National Council of State Boards of Nursing maintains survey data on advanced practice nurse regulations across all states, and the National Conference of State Legislatures tracks scope-of-practice bills as they move through state legislatures.