Nurse practitioners have been around for about 60 years. The role was created in 1965, when the first nurse practitioner program launched at the University of Colorado. What started as a small experiment to get healthcare to underserved children has grown into a profession with more than 461,000 active practitioners across the United States.
Why the Role Was Created in 1965
The nurse practitioner role grew out of a specific problem: a nationwide shortage of physicians in rural areas during the 1960s. Many communities, especially outside cities, simply didn’t have enough doctors to care for children. Loretta Ford, a nurse and World War II veteran, partnered with pediatrician Henry Silver to design a solution. Together they created the first nurse practitioner program at the University of Colorado, training nurses to provide a level of care that had previously been reserved for physicians.
The original focus was pediatrics. Ford and Silver wanted to increase access to pediatric care for families who couldn’t easily reach a doctor. The program trained nurses to conduct physical exams, diagnose common childhood illnesses, and manage ongoing care independently. It was a significant departure from the traditional nursing role, which at the time was much more tightly tethered to physician oversight. Ford, born in 1920, would later emphasize that the most important word in “nurse practitioner” is “nurse,” urging the profession to stay grounded in its nursing roots even as its scope expanded.
Growth Through the 1970s and 1980s
After the Colorado program proved successful, nurse practitioner training spread to other universities through the late 1960s and into the 1970s. A key moment came in 1977, when Congress passed the Rural Health Clinic Services Act. This legislation created a reimbursement pathway for nurse practitioners working in rural clinics, giving healthcare facilities a financial reason to hire them and giving NPs a more stable professional footing outside of academic settings.
Prescriptive authority followed a slower, state-by-state path. North Carolina became the first state to pass legislation allowing nurse practitioners to prescribe drugs, doing so in 1975. Other states gradually followed, though the pace varied enormously. By the time researchers began tracking the trend systematically, 26 jurisdictions had granted some form of prescriptive authority, but many states still restricted what NPs could prescribe and whether they needed a physician’s co-signature.
Through the early 1980s, nurse practitioners moved into settings well beyond pediatrics. The Pediatric Branch of the National Cancer Institute was among the first federal institutions to hire NPs, and over the following years, the role expanded into gynecology, rheumatology, endocrinology, pulmonology, cardiology, psychiatry, nuclear medicine, and infectious disease. What had been a single pediatric-focused experiment was becoming a multi-specialty profession.
How Specialties and Credentials Developed
As NPs spread into more clinical areas, formal credentialing followed. The American Nurses Credentialing Center began certifying nurse practitioners in specialty areas including adult care, pediatric care, family medicine, and acute care. These certifications helped standardize training expectations across states and gave hospitals and clinics a reliable way to evaluate NP qualifications. Today, most nurse practitioners hold certification in at least one specialty, and the credentialing system has become a core part of how the profession regulates itself.
The family nurse practitioner specialty became particularly popular because it mirrored the broad scope of a primary care physician, allowing NPs to treat patients of all ages. Psychiatric-mental health was another area of significant growth, driven by persistent shortages of mental health providers in much of the country.
The Profession Today
The most recent count, released by the American Association of Nurse Practitioners using 2025 data, puts the total number of licensed nurse practitioners in the United States at more than 461,000. That figure includes NPs working in patient care as well as those in teaching, administration, and research, though it excludes retired practitioners and anyone with an inactive license.
That number represents extraordinary growth from a profession that didn’t exist before 1965. For context, the expansion has accelerated in recent decades as more states have granted NPs full practice authority, meaning they can evaluate patients, diagnose conditions, and prescribe medications without mandatory physician oversight. The patchwork of state regulations remains one of the profession’s defining features: what a nurse practitioner can do in one state may still require physician collaboration in another.
The core mission, though, hasn’t changed much from what Ford and Silver envisioned in Colorado six decades ago. Nurse practitioners still disproportionately serve the populations with the least access to care, including rural communities, underserved urban neighborhoods, and regions with physician shortages. Ford herself has said she believes NPs providing high-quality primary care can address the country’s most persistent healthcare access problems, the same ones that created the profession in the first place.