In most states, CRNAs can prescribe medications, but the scope of that authority depends on where they practice. Roughly half the states let Certified Registered Nurse Anesthetists prescribe independently, the rest require some form of written agreement with a physician, and a small number limit prescribing to drugs tied directly to anesthesia. Controlled substances add a second layer of rules on top of whatever the state allows.
Ordering Drugs During Anesthesia Is Not the Same as Prescribing
This distinction trips people up constantly. Every CRNA, in every state, can order and administer medications during anesthesia care as part of their scope of practice. That includes controlled substances given intraoperatively, induction agents, pain medications titrated during a case, and drugs used to manage emergence. No prescription pad is involved, and no separate prescriptive authority is required.
Prescriptive authority is a different legal privilege. It covers writing a prescription a patient fills at a pharmacy, ordering medications outside the immediate perioperative window, and managing things like post-discharge pain medication or ongoing pain therapy. When someone asks whether a CRNA can “prescribe,” they almost always mean this second category, and the answer depends entirely on state law.
The Three State Models
Full Independent Prescriptive Authority
In roughly half of states, a CRNA holds prescriptive authority as part of the advanced practice license and exercises it without physician oversight, collaborative agreement, or supervisory relationship. These states have generally adopted the APRN Consensus Model developed by the National Council of State Boards of Nursing, which recommends independent practice and prescribing authority for all advanced practice registered nurses.1National Council of State Boards of Nursing. APRN Consensus Model
Collaborative or Supervisory Agreements
Other states require a written agreement with a physician before a CRNA can prescribe. The names vary, but the document typically spells out which medications the CRNA can prescribe, under what circumstances, and how physician consultation works. Some agreements are broad and largely administrative. Others impose real limits on drug categories or require periodic chart review. In some states the agreement barely changes day-to-day practice; in others it meaningfully restricts what a CRNA can prescribe without checking with a physician first. Agreements often carry a monthly fee paid to the collaborating physician.
Limited or No Prescriptive Authority
A small number of states either do not grant CRNAs prescriptive authority at all or restrict it to a narrow set of medications tied directly to anesthesia services. CRNAs in those states can still administer medications during procedures. They cannot write prescriptions for patients to fill independently. Fewer states fall into this category than a decade ago, but some remain.
Controlled Substances and DEA Registration
Federal law classifies CRNAs as “mid-level practitioners” authorized to handle controlled substances, alongside nurse practitioners, nurse midwives, and physician assistants. But federal registration alone is not enough. The state has to authorize the CRNA to prescribe or dispense controlled substances first; only then can the DEA registration issue on top of that authority.2Drug Enforcement Administration. Registration Q&A – DEA Diversion Control Division
Once state authorization is in place, the CRNA applies for a DEA number. The current fee is $888 for a three-year registration.3Federal Register. Registration and Reregistration Fees for Controlled Substance and List I Chemical Registrants DEA requires a separate registration for each physical location where the CRNA prescribes or dispenses controlled substances, so working at both a hospital and an outpatient surgery center can mean two registrations.2Drug Enforcement Administration. Registration Q&A – DEA Diversion Control Division
Schedule II drugs, such as fentanyl, oxycodone, and morphine, carry the tightest restrictions. Some states cap the quantity a CRNA can prescribe at one time or add documentation requirements for Schedule II prescriptions. Schedules III through V carry progressively fewer restrictions but still require the DEA registration. All applicants must also satisfy the training or credentialing requirements added by the Consolidated Appropriations Act of 2023, which apply to every practitioner who prescribes controlled substances.2Drug Enforcement Administration. Registration Q&A – DEA Diversion Control Division
What a CRNA Needs to Prescribe
Being licensed to practice anesthesia and being authorized to prescribe are usually two separate steps. The pieces a CRNA generally needs:
- A current registered nurse license and an advanced practice registered nurse license in the state where they plan to prescribe.4Council on Accreditation of Nurse Anesthesia Educational Programs. Requirements to Practice as a Nurse Anesthetist in the United States
- Passing score on the National Certification Examination administered by the National Board of Certification and Recertification for Nurse Anesthetists.4Council on Accreditation of Nurse Anesthesia Educational Programs. Requirements to Practice as a Nurse Anesthetist in the United States
- Advanced pharmacology coursework. Many states require specific graduate-level pharmacology hours before granting prescriptive authority. The doctoral program curriculum usually covers this, but some states require additional hours.
- A signed collaborative agreement with a physician, in states that require one.
- DEA registration, if the CRNA will prescribe controlled substances. State authorization has to be in hand before applying.
Some states also impose a transition-to-practice period for new graduates, requiring a set number of supervised hours before full prescriptive authority kicks in. Length and structure vary by state.
Keeping Prescriptive Authority Active
Prescriptive authority is not a one-time achievement. National certification runs on a four-year cycle through the NBCRNA’s Continued Professional Certification program, with a mid-cycle check at the two-year mark that verifies active state licensure and continued practice.5National Board of Certification and Recertification for Nurse Anesthetists. Continued Professional Certification Program State boards of nursing set their own renewal requirements on top of the national certification. DEA registration expires on its own three-year cycle, independent of state license renewals.
Letting any single piece lapse, whether the state license, the national certification, or the DEA registration, means losing prescriptive authority until everything is current again. Tracking multiple renewal dates is part of the job.
Where the Rules Are Heading
The regulatory picture has been shifting toward broader CRNA authority. The APRN Consensus Model calls for independent practice and independent prescribing for all advanced practice nurses, and more states have moved in that direction over the past decade.1National Council of State Boards of Nursing. APRN Consensus Model Adoption is uneven, and legislation is pending in several additional states.
Before assuming what you can or cannot prescribe, check your state board of nursing’s current regulations. The American Association of Nurse Anesthesiology publishes an interactive state-by-state map of practice requirements, and the state’s Nurse Practice Act is the controlling legal authority. Rules that applied when you graduated may have changed.