Anesthesia coverage for rural and critical access hospitals

Your hospital may have one CRNA covering call for the entire county. If that person takes a week of vacation, resigns, or gets sick, your operating room and possibly your labor and delivery unit lose coverage at the same time. A larger hospital absorbs a single departure. A rural or critical access hospital often cannot.

The rules that decide who is allowed to give an anesthetic, and how Medicare pays for it, are not the same for a 20-bed critical access hospital as they are for a 300-bed regional medical center. Working through them in order, before the next resignation letter arrives, is most of the job.

Start with which set of rules applies to you

Critical access hospital (CAH) is a specific Medicare designation, not a general description of a small or rural facility. To qualify, a hospital must keep 25 or fewer inpatient beds, hold its average annual length of stay to 96 hours or less, and sit more than a 35-mile drive from another hospital or CAH on primary roads, or more than 15 miles where mountainous terrain or secondary roads justify the shorter distance.¹² As of July 2026, 1,388 hospitals held the designation.³

A hospital that is rural but does not meet those tests, and is paid under the standard inpatient prospective payment system instead, follows a different anesthesia payment path than a CAH does. That distinction runs through everything below. Your Medicare cost report will say which one you are.

Decide who is legally allowed to give the anesthetic

Federal rules for critical access hospitals require a CRNA to work under the supervision of the operating practitioner or of an anesthesiologist who is immediately available, and a certified anesthesiologist assistant (CAA) to work under the supervision of an anesthesiologist who is immediately available, unless your state has opted out.⁴ A state opts out when its governor, after consulting the state boards of medicine and nursing, sends CMS a letter attesting that removing the supervision requirement serves the state's citizens and is consistent with state law. The change takes effect the day it is submitted.⁴

Twenty-seven states currently have some form of opt-out, and two of them did not opt out statewide.⁵ Utah's opt-out is limited to critical access hospitals and specified rural hospitals, and Wyoming's to critical access hospitals and hospitals with 25 licensed beds or fewer.⁵ If your state has opted out, confirm what was actually adopted before you plan around it. A statewide opt-out and a CAH-only opt-out carry different consequences for your bylaws.

The CAA supervision rule does not bend for rural hospitals. An anesthesiologist must be immediately available for a CAA to practice at all, opt-out or not.⁶ Most CAHs have no anesthesiologist on staff, so for most rural boards the real staffing choice sits between an anesthesiologist-directed care team and a CRNA-only model, not among three equally available professions. Our guide to care team ratios covers how Medicare pays each model and lists the opt-out states in full.

Recognize who is actually available to do the work

National data confirms what most rural CEOs already know. In a peer-reviewed analysis of rural counties, 81.2% had no anesthesiologist at all, 58.1% had no CRNA, and 55.1% had no surgeon.⁷ Where a rural county has any anesthesia provider, it is disproportionately likely to be a CRNA. That describes where the workforce lives, and it means most rural coverage plans end up built around CRNAs whether or not that was the board's first preference. Our overview of the anesthesia staffing shortage covers the national pipeline behind it.

Know how Medicare will pay for whatever you arrange

CAHs are paid for facility costs on a reasonable-cost basis, but professional services, the anesthesiologist's or CRNA's own work, follow a separate election. Under Method I, the clinician bills Medicare directly at the standard physician fee schedule rate. Under Method II, the CAH itself bills for the professional service, once the clinician reassigns billing rights to the hospital, and Medicare pays 115% of what the fee schedule would otherwise allow.⁸ A CAH can elect Method II for its other practitioners while separately keeping an existing pass-through arrangement for CRNA services, described next.⁸

That pass-through is narrower and older. It lets a qualifying rural hospital or CAH get CRNA services paid at reasonable cost instead of the fee schedule, but only if the hospital was in a rural area and had employed or contracted a qualified nonphysician anesthetist as of January 1, 1988, and only under an annual surgical volume cap: 500 procedures through September 2002, 800 a year since.⁹⁸ Because of the 1988 condition, this almost never applies to a program built today. If your hospital has held it since the 1980s, confirm your current status and volume with your Medicare Administrative Contractor. Cost-report settlement is the wrong place to find out otherwise. Our look at hospital-employed anesthesia covers this same pass-through for a hospital insourcing anesthesia for the first time.

Choose a model to staff the rooms

Model	How it works	Where it tends to fit	Main risk
Employed CRNAs, with physician medical direction if staffed	The hospital hires the clinicians and runs its own call schedule	A CAH large enough to run HR, credentialing and scheduling for its own department	A single vacancy falls entirely on the hospital to cover
Contracted CRNA group	An outside group employs the clinicians and staffs the hospital under a coverage contract	Hospitals that want anesthesia off their own HR and scheduling desk	The group's recruiting problems become your coverage problem
Regional group with shared call or remote backup	A larger regional anesthesia group covers several small hospitals, sometimes with remote audiovisual supervision for an on-site CRNA	Hospitals close enough to a regional hub to share call, or wanting remote physician backup for a CRNA-only room	Licensure, credentialing and liability frameworks for remote supervision are still unsettled in most states10
Hospital network arrangement	A larger health system extends its own anesthesia department's coverage to a smaller affiliate	CAHs already part of, or affiliating with, a larger system	Coverage priority can shift toward the system's larger sites first
Locum tenens backup	Temporary clinicians fill scheduled or emergency gaps	Bridging a vacancy, a leave or a credentialing delay, not a standing model	Daily cost is high, and it is not a coverage plan by itself

Whichever model you pick, the CAA supervision rule does not loosen: a CAA still needs an anesthesiologist immediately available.⁶ Teleanesthesiology, where a remote anesthesiologist supervises or backs up an on-site CRNA over live audiovisual links, has reported gains in on-site decision support in early studies, but fragmented state licensure, inconsistent credentialing and unresolved liability questions still limit how far it can substitute for a clinician physically in the building.¹⁰ Our anesthesia care team model work compares these options against your own call volume and what your state's supervision rules allow.

If you lean on temporary coverage while recruiting into any of these models, price it with a ceiling and an end date from the start. Our review of funding locums during a new group's ramp-up covers the same discipline for a different situation, and the contract terms transfer directly.

Weigh what the decision means for your obstetric unit

If your hospital delivers babies, anesthesia coverage decides much of that service line's future. As of 2018, more than half of rural counties had no hospital offering obstetric care at all, according to the Government Accountability Office.¹¹ In a 2025 survey of rural hospital administrators whose obstetric units had already closed, the cost of keeping anesthesia available around the clock was among the financial reasons cited, alongside the broader cost of full-time anesthesia and operating room staff, and two in three respondents cited a physician shortage as a factor in the closure.¹²

A labor floor cannot promise a safe emergency cesarean without someone available to give the anesthetic at three in the morning, whether or not a delivery happens that month. Ask your staffing model a second question: does it also cover obstetrics at the hours obstetrics needs, or did it solve daytime elective coverage and leave the overnight hours unanswered?

Recruit realistically, then keep who you have

A national survey of rural nurse anesthetists found salary ranked first among the factors that kept them in their jobs, but three cheaper, nonmonetary factors also mattered: guaranteed time off, feeling valued, and morale among colleagues.¹³ None of those require a compensation consultant. A call schedule that gives a solo or near-solo anesthetist predictable relief, and a leadership team that visibly treats that person as essential staff, costs less than a signing bonus and does more to prevent the resignation letter this plan is meant to survive.

Put the terms that protect you in writing before you need them

• Minimum coverage, in writing. Name the sites, days and hours covered as a contract exhibit, not a shared understanding that someone will always be there.
• Call pay that reflects the actual burden. A CRNA on call for a labor floor with one obstetrician on staff carries a different risk than one on call for a same-day surgery center that closes at five. Price them differently.
• A named backup plan for planned absences. Vacation, continuing education and parental leave are predictable. Decide in advance who covers when your only anesthetist is out, and who arranges it.
• A credentialing runway for locum backup. Temporary privileges take time to process. Ask your medical staff office for a realistic turnaround before you need one on short notice.
• Coverage data you actually see. Coverage delivered against coverage contracted, and any use of locums, reported to you on a schedule you set.

A hospital that writes these terms down before the letter arrives is negotiating a renewal. A hospital that does not is negotiating a resignation.

Sources

1. Cornell Law School, Legal Information Institute, "42 CFR § 485.610 – Condition of participation: Status and location," current text. https://www.law.cornell.edu/cfr/text/42/485.610 ↩

2. Cornell Law School, Legal Information Institute, "42 CFR § 485.620 – Condition of participation: Number of beds and length of stay," current text. https://www.law.cornell.edu/cfr/text/42/485.620 ↩

3. Rural Health Information Hub, "Critical Access Hospitals (CAHs) Overview," Rural Health Information Hub, July 2026. https://www.ruralhealthinfo.org/topics/critical-access-hospitals ↩

4. Cornell Law School, Legal Information Institute, "42 CFR § 485.639 – Condition of participation: Surgical services," current text. https://www.law.cornell.edu/cfr/text/42/485.639 ↩ ↩²

5. American Society of Anesthesiologists, "Opt-Outs," ASA Advocacy, undated. https://www.asahq.org/advocacy-and-asapac/advocacy-topics/opt-outs ↩ ↩²

6. American Society of Anesthesiologists, "Statement on Certified Anesthesiologist Assistants (CAAs): Description and Practice," ASA Standards and Practice Parameters, October 2022. https://www.asahq.org/standards-and-practice-parameters/statement-on-certified-anesthesiologist-assistants-description-and-practice ↩ ↩²

7. Cohen C, Baird M, Koirola N, Kandrack R, Martsolf G, "The Surgical and Anesthesia Workforce and Provision of Surgical Services in Rural Communities: A Mixed-Methods Examination," Journal of Rural Health, January 2021. https://pubmed.ncbi.nlm.nih.gov/32022951/ ↩

8. Cornell Law School, Legal Information Institute, "42 CFR § 413.70 – Payment for services of a CAH," current text. https://www.law.cornell.edu/cfr/text/42/413.70 ↩ ↩² ↩³

9. Cornell Law School, Legal Information Institute, "42 CFR § 412.113 – Other payments," current text. https://www.law.cornell.edu/cfr/text/42/412.113 ↩

10. Amoo L, Ma J, Patel R, Khan M, Zora J, Elahi E, Vinagolu-Baur J, Frasier K, "A Review of Remote Anesthesia Supervision Models in Rural and Underserved Settings Using Teleanesthesiology Platforms," Spartan Medical Research Journal, August 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC13428575/ ↩ ↩²

11. U.S. Government Accountability Office, "Maternal Health: Availability of Hospital-Based Obstetric Care in Rural Areas," GAO-23-105515, October 2022. https://www.gao.gov/products/gao-23-105515 ↩

12. Busse CE, O'Hanlon K, Kozhimannil KB, Interrante JD, "Financial challenges of providing obstetric services at rural US hospitals," Journal of Rural Health, September 2025. https://pubmed.ncbi.nlm.nih.gov/41117605/ ↩

13. Wilbanks BA, Effinger B, "Workforce Assessment of Nurse Anesthetists to Mitigate Intent to Leave and Improve Labor Participation," Journal of Nursing Administration, March 2025. https://pubmed.ncbi.nlm.nih.gov/39970027/ ↩