Nurse practitioners (NPs) are the most common type of nurse who can write prescriptions. They have prescriptive authority in all 50 states and Washington, D.C. Three other categories of advanced practice registered nurses (APRNs) can also prescribe in some states: certified nurse midwives, certified registered nurse anesthetists, and clinical nurse specialists. A standard registered nurse or licensed practical nurse cannot prescribe medications.
Nurse Practitioners Have the Broadest Prescribing Role
Nurse practitioners are the nurses most people encounter as prescribers. They can diagnose health problems, order diagnostic tests, and prescribe medications, including many controlled substances. Their prescribing scope closely mirrors that of a physician in primary care, urgent care, and many specialty settings. In practice, an NP appointment often looks and feels identical to a doctor’s visit: you’ll get an exam, a diagnosis, and a prescription if you need one.
That said, prescribing authority for NPs is not uniform across the country. How much independence an NP has depends entirely on the state where they practice. Some states grant NPs full practice authority, meaning they can prescribe without any physician involvement. Other states require a collaborative agreement with a physician or even direct physician supervision before an NP can write a prescription. The trend over the past decade has been toward granting NPs more independence. South Carolina, for example, has pending legislation that would allow APRNs to practice independently after completing 2,000 clinical hours post-licensure, holding malpractice insurance, and receiving board approval.
Other Nurses With Prescribing Authority
Three other types of advanced practice nurses hold prescriptive authority in certain states, though with narrower scopes than nurse practitioners.
Certified nurse midwives (CNMs) prescribe medications related to reproductive health, pregnancy, postpartum care, and general gynecological needs. In states with full practice authority, they prescribe independently. In others, they work under a collaborative agreement with a physician.
Certified registered nurse anesthetists (CRNAs) have a unique situation. They can order and directly administer controlled substances and other drugs during surgery and in the immediate pre- and post-operative period without needing separate prescriptive authority. That’s considered part of routine anesthesia care. Prescriptive authority for CRNAs specifically refers to prescribing medications outside this perioperative window, such as writing a take-home prescription for a patient. Not all states grant CRNAs that broader authority.
Clinical nurse specialists (CNSs) focus on a specific patient population or disease area. Their prescriptive authority varies widely and is unavailable in several states.
What Full Practice Authority Means
When a state grants “full practice authority,” it means an APRN can evaluate patients, diagnose conditions, and prescribe treatments, including medications, without a physician co-signing or overseeing those decisions. The nurse is independently licensed and independently accountable.
In states without full practice authority, an NP or other APRN must maintain a formal collaborative practice agreement with a physician. These agreements spell out the specific conditions the nurse can treat, the drug therapies they can prescribe, and when they must consult with or refer to the supervising physician. Florida’s protocol, for example, requires the agreement to list the APRN’s duties, the conditions they can treat, the specific drug therapies they may prescribe, and the situations that require direct physician evaluation. The supervising physician must be reachable by phone or other communication device when not physically present.
For patients, the practical difference is often invisible. Whether an NP has full practice authority or works under a collaborative agreement, your visit and your prescription look the same. The distinction matters more for where NPs can set up practices (rural areas with physician shortages, for instance) and how quickly they can act without waiting for physician approval.
Prescribing Controlled Substances
Prescribing controlled substances, such as certain pain medications, stimulants, or anti-anxiety drugs, requires extra steps beyond a basic nursing license. An NP or other APRN who wants to prescribe these medications must register with the Drug Enforcement Administration (DEA) and obtain a DEA number. They also need a National Provider Identifier (NPI), which is the standard identification number used across the healthcare system.
Not all states grant controlled substance prescribing to every APRN category. Even in states that do, there can be limitations. In Arizona, for instance, NPs can prescribe Schedule II through V controlled substances but cannot prescribe opioids specifically for medication-assisted treatment of substance use disorders. These carve-outs vary by state, so an NP’s controlled substance authority in one state may not match what’s allowed in another.
In states that require collaborative agreements, the physician-APRN protocol typically specifies which controlled substances the nurse can prescribe. Some states require special prescription forms for controlled substances on top of the DEA registration.
How to Verify Your Nurse’s Prescribing Authority
Every legitimate prescription from a nurse prescriber will include their NPI number and, if the medication is a controlled substance, their DEA number. Pharmacies verify these credentials before filling a prescription, so you don’t need to do this yourself. But if you want to confirm that a nurse practitioner or other APRN is licensed and authorized to prescribe in your state, you can check your state board of nursing’s online license verification tool.
If you receive a prescription from an NP, CNM, CRNA, or CNS, it carries the same legal weight as a physician’s prescription within that nurse’s authorized scope. Pharmacies fill these prescriptions the same way. Insurance companies process them the same way. The key requirement is that the prescribing nurse holds the proper credentials for the specific medication and the state where they’re practicing.