Physician-Led Obstetric Anesthesia Care and Maternal Safety in Rural America
American Society of Anesthesiologists
Committee on Rural Access to Anesthesia Care
Maternal mortality and severe maternal morbidity remain unacceptably high in the United States, with rural communities experiencing consistently worse outcomes than urban communities. Peer-reviewed literature demonstrates that rural residents and patients delivering in lower-volume rural hospitals face higher rates of severe maternal morbidity, intensive care admission, and pregnancy-related death.1-4 At the same time, rural communities have less consistent access to physician specialists, including physician Anesthesiologists.6 Physician Anesthesiologist expertise can be particularly important when obstetric complications require rapid resuscitation, airway management, hemodynamic support, or critical care.12-15
Federal policy creates a relevant payment asymmetry. Under the Medicare Rural Pass-Through, qualifying rural hospitals and Critical Access Hospitals may receive reasonable cost-based reimbursement for professional anesthesia services furnished by qualified nonphysician anesthetists. The program does not provide an analogous reasonable cost-based pathway for physician Anesthesiologist professional services.7,8 It is reasonable to conclude that differential reimbursement alters the relative economics of recruiting and sustaining physician-level anesthesia services in rural hospitals.
For purposes of this paper, physician-led care includes locally appropriate models in which a physician Anesthesiologist is meaningfully available for pre-delivery assessment, clinical planning, consultation, supervision, team leadership, emergency rescue, or direct care. This white paper reviews the evidence linking rural facility status to increased maternal risk, explains how physician Anesthesiologist involvement strengthens obstetric readiness, and outlines a strategy to expand access to physician-led care in rural communities.
I. Maternal Mortality and Morbidity Are Higher in Rural Facilities
A substantial body of peer-reviewed literature demonstrates that maternal outcomes are worse in rural settings and that these differences are not explained solely by patient characteristics. Harrington and colleagues, analyzing U.S. data from 2016 through 2019, found significantly higher rates of maternal mortality and intensive care unit admission among rural patients, with rural maternal mortality nearly twice the urban rate by 2019.1
Evidence also points to facility-level contributors to maternal risk. In a multi-state analysis published in JAMA Health Forum, Kozhimannil and colleagues found that patients delivering in lower-volume rural hospitals experienced higher rates of severe maternal morbidity than those delivering in rural hospitals with more than 460 annual births. The association was present among both low-risk and higher-risk patients. Among low-risk patients, those delivering at rural hospitals with 10 to 110 annual births had more than twice the adjusted risk of severe maternal morbidity compared with patients at the highest-volume rural hospitals.2
National discharge data support these findings. Using the National Inpatient Sample, Kozhimannil and colleagues reported that, after adjustment for sociodemographic and clinical factors, rural residents had a 9% greater probability of severe maternal morbidity or mortality during childbirth hospitalization than urban residents.3 Pregnancy-related mortality also increased with rurality in national surveillance data, reaching approximately 24 deaths per 100,000 live births in noncore rural counties compared with approximately 15 in large metropolitan counties.4
Together, these studies demonstrate that rurality and low obstetric volume are associated with greater maternal risk.1-4 Institutional readiness and expertise immediately available during a rapidly evolving emergency are particularly important in rural obstetric care.12-15,17
These risks are further amplified among Black patients. Within every urban-rural category evaluated by Merkt and colleagues, Black patients had substantially higher pregnancy-related mortality than White patients.4 Anesthesia-related disparities are relevant as well. A contemporary analysis found higher use of general anesthesia for cesarean delivery among Black and Hispanic patients than among non-Hispanic White patients.5 General anesthesia for cesarean delivery is associated with greater maternal risk than neuraxial anesthesia, including airway-management complications, aspiration, cardiac arrest, postpartum hemorrhage, and maternal mortality.5,13 These findings reinforce the importance of timely anesthetic evaluation, planning, neuraxial procedural expertise, and rescue capability as part of a comprehensive rural maternal-safety strategy.
II. Physician Anesthesiologist Access in Rural Facilities and the Role of the Rural Pass-Through
Rural communities experience longstanding shortages of physician specialists. Anesthesiology is no exception. National county-level analysis demonstrates that physician Anesthesiologists become less available as rurality increases.6
Federal payment policy directly affects the ability of rural hospitals to recruit and sustain anesthesia professionals. Under federal regulations, qualifying rural hospitals and Critical Access Hospitals may receive reasonable cost-based payment for professional anesthesia services furnished by employed or contracted qualified nonphysician anesthetists, including Certified Registered Nurse Anesthetists (CRNAs) and Certified Anesthesiologist Assistants (CAAs), subject to program requirements. CMS confirms reasonable cost-based payment for qualifying CRNA or CAA professional services. Physician Anesthesiologist professional services do not receive an analogous pass-through pathway.7,8
This structure effectively removes two of the three anesthesia provider types from meaningful consideration under the rural recruitment incentive. Physician Anesthesiologists are directly excluded from pass-through support. CAAs are nominally eligible, but federal hospital and Critical Access Hospital regulations require them to practice under physician Anesthesiologist supervision.9,10 A rural hospital cannot build or sustain a CAA-based anesthesia model without also recruiting and financially supporting a physician Anesthesiologist. Because the physician component receives no comparable pass-through support, the current policy substantially limits the practical utility of CAA eligibility. In effect, CRNAs are the only anesthesia provider type that can be recruited through the pass-through mechanism without the hospital also recruiting and financing a physician Anesthesiologist who is excluded from comparable support.
This is particularly consequential in low-volume rural hospitals, where much of the expense of obstetric anesthesia reflects the fixed cost of maintaining continuous readiness rather than the number of billable encounters. A hospital must sustain personnel, call availability, equipment, blood-product readiness, emergency protocols, and rescue capability whether it performs several deliveries per day or only several per month. Providing cost-based support for only one practically deployable anesthesia staffing pathway restricts the hospital’s workforce options and discourages development of physician-led models.
Recent statewide data underscore the clinical importance of rural obstetric anesthesia readiness. In an analysis of 592,868 North Carolina deliveries from 2015 through 2020, rural hospital admission remained independently associated with higher odds of an anesthesia-related complication.11 Rural obstetric anesthesia complications therefore represent a measurable patient-safety concern in hospitals where maintaining comprehensive readiness is most difficult.
The Rural Pass-Through should be understood as a policy design and access issue. Federal payment policy should not eliminate two of the three potential anesthesia provider types from meaningful consideration when rural hospitals are determining how best to meet their patients’ clinical needs. Extending comparable support to physician Anesthesiologists would expand, rather than restrict, the range of viable rural anesthesia models.
III. Mechanisms by Which Physician-Led Care Strengthens Maternal Safety
Physician-led obstetric anesthesia care can strengthen maternal safety through several interrelated mechanisms that are particularly relevant in rural, resource-limited environments.14
First, physician Anesthesiologists bring advanced expertise in pre-delivery planning and risk stratification. Their training supports comprehensive assessment of patients with complex conditions such as preeclampsia, morbid obesity, structural heart disease, coagulopathy, placenta accreta spectrum, and substance use disorders. ASA guidance recommends Anesthesiology consultation when significant anesthetic or obstetric risk factors are recognized, and contemporary specialty statements emphasize timely antenatal consultation for high-risk patients. Early physician involvement permits individualized airway, neuraxial, hemodynamic, transfusion, and postoperative plans before an emergency develops.12,14-16
Second, physician Anesthesiologists provide clinical leadership within team-based care models. Obstetric emergencies require coordinated action among obstetricians, anesthesia professionals, nursing staff, blood bank personnel, respiratory therapists, emergency physicians, and transfer teams. Physician Anesthesiologists are trained to integrate physiologic assessment, anesthetic management, resuscitation, and critical care during rapidly evolving crises.12-15
Third, physician Anesthesiologists increase the team’s capacity to rescue a patient during a medical crisis. Maternal harm may result not only from the initial complication, but also from delayed recognition or inadequate rescue. Advanced airway management, invasive vascular access, massive transfusion, vasoactive drug management, cardiopulmonary resuscitation, and conversion between neuraxial and general anesthesia are central to Anesthesiology training and are especially important when transfer to a higher level of care is delayed.12-15
Finally, physician Anesthesiologists bring perioperative and critical-care expertise that supports invasive monitoring, mechanical ventilation, hemodynamic stabilization, and transfer when additional specialty assistance is required.12-15 The American College of Obstetricians and Gynecologists states that anesthesia services should be available in all hospitals offering maternal care.17 ASA guidance emphasizes the physician Anesthesiologist’s role in high-risk consultation, systems readiness, and maternal rescue.15,16
These mechanisms are grounded in physician training, specialty standards, and the known demands of obstetric emergencies. Rural Pass-Through policy should not discourage a rural facility’s ability to sustain meaningful physician Anesthesiologist involvement when its clinical circumstances warrant it.
