A CNM, or Certified Nurse-Midwife, is an advanced practice registered nurse who specializes in pregnancy, childbirth, and reproductive healthcare. CNMs hold graduate degrees, pass a national certification exam, and are licensed to practice independently in all 50 states. While most people associate midwives with delivering babies, CNMs actually provide a broad range of healthcare services, from prescribing medications and ordering diagnostic tests to managing chronic conditions and providing primary care across all stages of life.
Education and Certification
Becoming a CNM requires several years of education beyond a standard nursing degree. Candidates must first earn a registered nurse (RN) license, then complete a graduate-level midwifery program accredited by the Accreditation Commission for Midwifery Education. Most CNMs hold either a master’s degree in nurse-midwifery or a Doctor of Nursing Practice degree.
After finishing their program, graduates must pass a national certification exam administered by the American Midwifery Certification Board (AMCB). Eligibility requires an active RN license and verification from the program director that the candidate is performing at the level of a “safe, beginning practitioner.” Those who pass receive the CNM credential, which must be renewed every five years through a certificate maintenance program.
What Services CNMs Provide
CNMs do far more than catch babies. Their recognized scope of practice includes prenatal care, labor and delivery management, postpartum care, family planning, gynecological care, wellness checkups, health screenings, and vaccinations. They can prescribe medications, order lab work and imaging, and assist physicians during surgery.
A workforce study found that while antepartum and intrapartum (labor) care make up the core of most CNM practices, roughly half of CNMs also spend significant time providing gynecological care. Many manage conditions outside of reproductive health as well, frequently addressing psychological, kidney, and endocrine concerns. CNMs are, in fact, the only midwifery professionals with competency expectations that extend to both reproductive and primary care for people of all ages, inclusive of all gender identities and sexual orientations.
How CNMs Approach Care
The defining philosophy of CNM practice is support for the natural process of pregnancy and birth, combined with readiness to use medical interventions when they’re needed or wanted. During labor, CNMs commonly offer both nonpharmacologic options (walking, hydrotherapy, continuous one-on-one support, music) and pharmacologic ones (epidurals, opioids). About 74% of CNMs offer ambulation during labor, 62% offer epidurals, and roughly half provide continuous labor support and hydrotherapy.
CNMs focus primarily on low-risk pregnancies. When complications arise that fall outside their scope, such as the need for a cesarean section, a forceps-assisted delivery, a major hemorrhage, or a complex surgical repair, an OB/GYN takes over. Most CNMs practice in hospital settings and work collaboratively with physicians, so that transition happens seamlessly.
CNMs vs. OB/GYNs
An OB/GYN is a medical doctor who completes four years of medical school, four years of residency, and often a three-year fellowship. They are trained to manage both low-risk and high-risk pregnancies and can perform surgery. A CNM holds a graduate nursing degree in midwifery and focuses on lower-risk care with an emphasis on labor support and minimizing unnecessary interventions.
The two aren’t competing options so much as complementary ones. Many people with straightforward pregnancies choose a CNM for the hands-on labor support and lower intervention rates, while those with conditions like preeclampsia, placenta previa, or a history of complicated deliveries typically need an OB/GYN’s surgical training.
Outcomes With Midwifery-Led Care
Research consistently links midwifery-led care to fewer interventions and higher patient satisfaction. A large meta-analysis published in BMC Pregnancy and Childbirth found that midwifery-led care reduced the odds of emergency cesarean section by 51% and cut episiotomy rates by 54% compared to non-midwifery care. These numbers reflect the midwifery model’s emphasis on patience with the labor process and selective use of surgical procedures.
Where CNMs Practice
The vast majority of midwife-attended births happen in hospitals. Among urban residents, about 89% of midwife-attended births occur in a hospital, with roughly 4% in freestanding birth centers and 6% at home. Rural residents see a similar hospital-dominant pattern at 84%, though home births are somewhat more common at about 11%. The Bureau of Labor Statistics counted approximately 6,960 nurse midwives in employed positions as of May 2023, though this figure excludes self-employed practitioners.
Prescriptive Authority by State
CNMs can prescribe medications in every state, but the level of independence varies. Some states grant full independent prescriptive authority, meaning a CNM can prescribe without any physician oversight. Alaska and Delaware are examples. Other states require a collaborative agreement or supervisory relationship with a physician. In California, for instance, CNMs prescribe under physician supervision following standardized protocols. Kentucky allows CNMs to prescribe under a collaborative agreement but requires at least one year of practice before they can prescribe controlled substances independently under that agreement.
These differences matter practically. In states with full independent authority, CNMs can open their own practices and manage patients without a collaborating physician on file. In more restrictive states, they need a formal relationship with a doctor, which can limit where and how they practice, particularly in rural areas with physician shortages.
How CNM Differs From Other Midwife Credentials
Three main midwifery credentials exist in the United States, and they are not interchangeable:
- Certified Nurse-Midwife (CNM): Requires an RN license and a graduate degree from an accredited midwifery program. Licensed to practice independently in all 50 states.
- Certified Midwife (CM): Requires a graduate degree in midwifery but not a nursing background. CMs complete required science and health coursework instead. They provide the same level of care as CNMs, but their license to practice independently varies by state.
- Certified Professional Midwife (CPM): Does not require an academic degree. Certification is based on demonstrated knowledge and skills, with a high school diploma as the minimum educational prerequisite. Practice privileges vary widely by state.
CNMs have the broadest legal recognition and the most consistent practice rights across the country, which is one reason the credential remains the most common pathway into professional midwifery in the U.S.
Insurance Coverage
Medicaid covers CNM services in every state, but reimbursement rates are not always equal to what physicians receive. Twenty states reimburse CNMs at rates 10% to 25% lower than physicians for the same services. This gap matters because it can discourage practices from hiring CNMs and reduce access for Medicaid patients. When Illinois implemented a policy requiring equal Medicaid reimbursement for CNMs and physicians in 2006, researchers found a measurable increase in CNM-led births, suggesting that pay equity directly affects how many people can access midwifery care. Private insurance coverage varies by plan but generally includes CNM services, especially for pregnancy-related care.