A certified nurse midwife is a registered nurse with additional training in pregnancy, labor, and birth

A certified nurse midwife (CNM) is a nurse who has completed a master's degree or graduate certificate in midwifery and passed a national certification exam. They are licensed to manage pregnancies, deliver babies, and provide postpartum care — often with fewer restrictions than nurses working in other roles. CNMs work in hospitals, birth centers, and sometimes homes, depending on state law and their employer's policies.

The key difference between a CNM and a regular labor-and-delivery nurse is scope of practice. A labor nurse assists doctors and midwives but does not make independent clinical decisions about a patient's care. A CNM does make those decisions: they order tests, prescribe medications within their scope, manage labor, and deliver babies without a physician present in routine cases. When complications arise, they consult with or refer to an obstetrician.

CNMs are regulated by state boards of nursing, not by medical boards, which shapes how they practice. Some states allow CNMs to work entirely independently; others require physician oversight or collaboration agreements. Insurance coverage and hospital privileges also vary by state and employer.

Key Takeaways

  • A certified nurse midwife holds both a nursing license and a separate midwifery certification, requiring a master's degree and a national exam.
  • CNMs manage routine pregnancies from start to finish, including prenatal visits, labor support, delivery, and postpartum follow-up without a physician present.
  • When complications develop, CNMs consult with obstetricians or transfer care rather than handling high-risk situations alone.
  • CNM practice varies by state law — some states allow independent practice while others require a physician collaboration agreement.
  • CNMs work in hospitals, freestanding birth centers, and occasionally homes, depending on state regulations and employer policy.

What CNMs do during pregnancy

During pregnancy, a CNM performs the same initial intake and screening that an obstetrician would: taking a full medical history, ordering blood tests and ultrasounds, and checking blood pressure and weight at each visit. They counsel patients on nutrition, exercise, and what to expect during labor. They also screen for gestational diabetes, preeclampsia, and other conditions that can develop during pregnancy.

If a patient's pregnancy is low-risk — meaning no diabetes, high blood pressure, previous complications, or other serious conditions — a CNM can manage the entire pregnancy independently. They see the patient at regular intervals, typically every four weeks until month seven, then every two weeks until month nine, then weekly until delivery. If a patient develops a complication, the CNM either manages it within their scope or refers to an obstetrician for consultation or ongoing care.

CNMs also provide education about labor options, pain management, and birth plans. They discuss when to come to the hospital or birth center, what happens during labor, and what to do if labor starts at home.

What CNMs do during labor and delivery

When a patient in labor arrives at a hospital or birth center where a CNM works, the CNM assesses the patient's condition: checking cervical dilation, monitoring the baby's heart rate, and reviewing the patient's medical history and labor progress. The CNM decides whether labor is progressing normally or whether complications are developing.

Throughout labor, the CNM monitors both mother and baby using fetal monitors, vital signs checks, and periodic vaginal exams. They manage pain using non-medication methods — position changes, movement, breathing techniques, continuous support — and can order pain medication if the patient requests it. They also manage the second stage of labor, when the patient pushes, and deliver the baby.

If labor stalls, the baby shows signs of distress, or other complications arise, the CNM's response depends on the situation and the setting. In a hospital, they may consult with an obstetrician, order interventions like labor induction, or prepare for emergency transfer to the operating room. In a birth center, they may transfer the patient to a hospital. CNMs do not perform cesarean sections or use forceps or vacuum extraction in most settings — those are physician procedures — though a few states and employers allow CNMs limited use of these tools.

What CNMs do after birth

when ready after delivery, the CNM checks the baby for breathing, heart rate, and other signs of health, and performs initial newborn care like vitamin K injection and eye ointment. They also deliver the placenta and check for bleeding or other complications in the mother. They repair minor tears if needed (though major tears may require a physician).

In the hours and days after birth, the CNM monitors the mother for infection, excessive bleeding, and blood clots. They assess breastfeeding, check the baby's feeding and elimination, and screen the baby for jaundice and other newborn conditions. They also provide education about recovery, contraception, and when to seek care if problems develop.

CNMs typically see patients for a postpartum visit around six weeks after delivery to check healing, discuss contraception, and address any ongoing concerns. Some CNMs also provide gynecological care and family planning services beyond the postpartum period.

Where CNMs work and what settings allow

CNMs work in three main settings: hospitals, freestanding birth centers, and homes. In hospitals, CNMs are employed by the hospital and work alongside obstetricians and other staff. They may have their own patient panel or share patients with physicians. Hospital policies determine whether a CNM can manage labor and delivery independently or must have a physician present or when ready available.

Freestanding birth centers are independent facilities — not part of a hospital — where CNMs (and sometimes other midwives) provide care for low-risk pregnancies. These centers are licensed by the state and typically have transfer agreements with nearby hospitals in case complications arise. Patients labor and deliver in the birth center and go home within a few hours if all is well.

Home birth with a CNM is legal in some states and illegal in others. Where it is permitted, CNMs attend births in patients' homes, bring emergency equipment, and transfer to a hospital if needed. Home birth is rare in the United States and is usually chosen by patients who want minimal medical intervention and a familiar environment.

How CNM training differs from other birth attendants

A CNM must first be a registered nurse (RN), which requires a bachelor's degree in nursing and passing the RN licensing exam. After working as an RN, they pursue a master's degree or graduate certificate in midwifery, which takes one to three years depending on the program. The program includes classroom study in anatomy, physiology, pharmacology, and midwifery, plus supervised clinical experience attending births and managing pregnancies.

After graduation, CNMs must pass the American Midwifery Certification Board (AMCB) exam to become certified. Certification must be renewed every five years by completing continuing education hours and either retaking the exam or submitting proof of practice hours.

This training path differs from other birth attendants. A certified midwife (CM) — not to be confused with a CNM — has midwifery training but is not a nurse and does not have an RN license. A lay midwife or direct-entry midwife has midwifery training but no nursing background and may or may not be certified, depending on state law. A doula is trained to provide emotional and physical support during labor but does not perform clinical tasks like checking dilation or delivering the baby.

State-by-state differences in what CNMs can do

CNM practice is regulated by state nursing boards, and the scope of practice varies significantly. Some states grant CNMs full independent practice authority, meaning they can see patients, order tests, prescribe medications, and manage labor without any physician involvement. Other states require a collaboration agreement with a physician, meaning a CNM must have a written agreement with an obstetrician or family medicine doctor before practicing, though the physician may not be present during care.

A few states require physician supervision, meaning a physician must be physically present or when ready available during labor and delivery. Some states restrict CNMs from prescribing certain medications or from managing specific complications. A handful of states do not recognize CNM licensure at all, though this is rare.

Insurance coverage also varies by state and by individual insurance plan. Some plans cover CNM care at the same rate as obstetrician care; others cover it at a lower rate or require higher out-of-pocket costs. Medicare covers CNM services in all states, though the reimbursement rate is typically lower than for physicians.

Frequently Asked Questions

Can a CNM deliver twins or breech babies?

This depends on the CNM's training, experience, and the policies of their employer. Some CNMs are trained and experienced in managing twin births and vaginal breech delivery, while others are not. A CNM who does not have this experience will refer to an obstetrician. Ask your CNM directly about their experience with the specific situation you are concerned about.

What happens if something goes wrong during labor with a CNM?

If a complication develops, the CNM's response depends on the setting and the type of problem. In a hospital, they consult with an obstetrician, who may take over care or perform a cesarean section if needed. In a birth center, the CNM transfers the patient to a hospital. CNMs are trained to recognize complications early and to know when to seek help rather than manage alone.

Is it cheaper to use a CNM instead of an obstetrician?

CNM services are often less expensive than obstetrician care, but the difference depends on your insurance plan, your location, and whether you are paying out-of-pocket. Medicare and most insurance plans cover CNM care, though sometimes at a lower reimbursement rate. Ask your insurance company what your out-of-pocket costs would be with a CNM versus an obstetrician.

Do CNMs work with high-risk pregnancies?

CNMs typically manage low-risk pregnancies independently. If a patient develops a high-risk condition — such as gestational diabetes, preeclampsia, or a previous cesarean section — the CNM may continue to provide some care in collaboration with an obstetrician, or may refer entirely to an obstetrician. The specific arrangement depends on the condition and the CNM's experience.

Can a CNM prescribe pain medication during labor?

Yes, CNMs can order pain medication including epidurals, though the epidural itself is placed by an anesthesiologist or nurse anesthetist. CNMs can also prescribe other pain medications like nitrous oxide or IV opioids, depending on what is available in their setting and their state's regulations.