CRNA vs Anesthesiologist: One Anesthetic, Two Licenses

What’s The Difference Between A CRNA And An Anesthesiologist?

The license. A CRNA is an advanced practice registered nurse who specializes in anesthesia, and COA puts it this way: “Upon successful completion of the NCE, the individual is entitled to use the credential CRNA.” An anesthesiologist is a physician who went to medical school and then trained in anesthesiology as a resident.

What they do at the bedside overlaps a great deal. The federal hospital rule names both in one list of people allowed to give anesthesia, and it asks for the same bookends from either: “a preanesthesia evaluation completed and documented by an individual qualified to administer anesthesia” before the procedure, and a postanesthesia evaluation after it. That's why CRNA vs anesthesiologist is a closer comparison than most “nurse vs doctor” questions. The differences sit in the clauses attached to each name, which the supervision section quotes.

Both professions also teach nurse anesthesia students. COA's standards set the ratio: “Clinical supervision of students must not exceed (1) 2 students to 1 CRNA, or (2) 2 students to 1 physician anesthesiologist, if no CRNA is involved.” So a CRNA in training learns from both.

CRNA vs Anesthesiologist Training: How Long Each Route Takes

Counted from the first degree, the anesthesiologist route is about twice as long. Here are both, at their minimums.

The CRNA route starts with a gate most people don't expect. You can't apply to a nurse anesthesia program straight from nursing school. COA's admission standard calls for “a minimum of 1 year full-time critical care experience, or its part-time equivalent, as a registered nurse in a critical care setting.” After that comes the program, and since 2022 it's a doctorate: COA's standards say “students accepted into accredited entry-level programs on or after January 1, 2022 must graduate with doctoral degrees.” Programs run at least 36 months. Whether yours awards a DNP or a DNAP doesn't change the exam or the license, which DNP vs DNAP covers.

The anesthesiologist route is four years of medical school and then residency. ACGME's anesthesiology requirements read: “The educational programs in anesthesiology are configured in 36-month and 48-month formats. The latter includes 12 months of education in fundamental clinical skills of medicine, and both include 36 months of education in clinical anesthesia (CA-1, CA-2, and CA-3 years).” The shorter format isn't a shortcut. A resident entering it must already have the 12 months of general clinical training from another program, so both come to 48 months.

Add it up and a CRNA needs at least four years after the BSN, and an anesthesiologist at least eight years after the bachelor's. That's the CRNA vs anesthesiologist time difference in one line. Both figures are floors: the critical care year is a minimum, and part-time study stretches either route.

CRNA vs Anesthesiologist Clinical Hours

This is where CRNA vs anesthesiologist arguments get loud, so here's what each accreditor actually sets.

For nurse anesthesia, COA sets a floor in hours and in cases. Its appendix reads “The minimum number of clinical hours is 2,000,” and the case log must reach at least 700, with 750 preferred. Those hours sit on top of the critical care year before admission, which isn't counted in them. COA also caps the student week: “A reasonable number of hours to ensure patient safety and promote effective student learning should not exceed 64 hours per week.”

For anesthesiologists, ACGME sets months, rotations and a weekly cap of 80 hours, and no grand total. Across the residency it requires rotations by subject. For one example, “Resident education must include a minimum of four one-month rotations in critical care medicine.” The big round hour totals you'll see on other pages are estimates. The requirements themselves don't print one.

So the gap is real and large, and it's mostly residency. What you won't find here is one precise number for each side, because only one side publishes one.

What Can An Anesthesiologist Do That A CRNA Can’t?

Practice medicine under a medical license. For anesthesia itself, the clearest line is a federal one, the Medicare condition of participation a hospital in the Medicare program must meet. 42 CFR 482.52 lists who may give anesthesia. First on the list: “A qualified anesthesiologist.” Fourth:

A certified registered nurse anesthetist (CRNA), as defined in § 410.69(b) of this chapter, who, unless exempted in accordance with paragraph (c) of this section, is under the supervision of the operating practitioner or of an anesthesiologist who is immediately available if needed.

Two things in that sentence matter. The supervisor can be the operating practitioner, the surgeon for example, not only an anesthesiologist. And the rule has an exit, paragraph (c): “A hospital may be exempted from the requirement for physician supervision of CRNAs as described in paragraph (a)(4) of this section, if the State in which the hospital is located submits a letter to CMS signed by the Governor, following consultation with the State’s Boards of Medicine and Nursing, requesting exemption from physician supervision of CRNAs.” A state that has opted out removes the federal supervision requirement for its hospitals. It doesn't settle scope on its own, because state nursing and medical law still apply, and so does each hospital's credentialing.

Offices and surgery centers have rules of their own, and state law varies. If you're weighing CRNA vs anesthesiologist as a career, check the rules in the state you want to work in, and ask employers whether they run a care team with anesthesiologists or staff CRNAs on their own.

CRNA vs Anesthesiologist Salary

BLS classifies by occupation, not by credential: there is no DNP wage series, and every figure here covers everyone in the occupation regardless of which degree they hold. Here that works in your favor, because the two occupations line up with the two professions exactly: every nurse anesthetist is counted in 29-1151, and anesthesiologists have their own series, 29-1211.

Nurse anesthetists earned a median of $236,590 in May 2025. Anesthesiologists earned a median of $391,490, which is $154,900 more, or 1.65 times the CRNA figure. By the hour, the medians were $113.75 and $188.22.

The spread is worth a look. The top tenth of CRNAs earn more than $339,500, and the top tenth of anesthesiologists more than $557,130. The anesthesiologist series also has a long lower tail: its 10th percentile, $101,460, sits below the CRNA 10th percentile of $155,250. That's why its median, not its mean of $360,570, is the number to quote.

BLS also counts more nurse anesthetist jobs than anesthesiologist jobs, 51,840 against 38,760. CRNA pay also moves a long way by state, and the CRNA salary page has every state BLS publishes, including the highest-paying ones.

CRNA Or Anesthesiologist: Which Should You Choose?

Where you're starting from decides most of it.

1. You're an ICU nurse. The CRNA route builds on the license and experience you already have. You're a year of critical care and a doctorate of at least 36 months away, and you keep earning as a nurse until the program starts. For most readers of this site, that's the realistic path into anesthesia.
2. You haven't started a health career yet. Then CRNA vs anesthesiologist is a real choice. The physician route is about twice as long, and it pays more and carries the medical license. The nursing route is shorter and pays well by any standard, and it depends more on the state and the employer for how independently you'll work.
3. You're a nurse practitioner. Your NP license doesn't carry over into anesthesia. You'd still need the critical care year and a COA-accredited program, because the NBCRNA only admits graduates of one.

If the CRNA route is yours, COA accredits 156 programs in 46 states and territories, and the nurse anesthetist career page walks through the day-to-day work and where CRNAs are employed.

Related Pages

• CRNA Salary, State By State CRNA salary from the federal wage survey: the median, the full percentile spread, every state BLS publishes, and why the gap measures the job, not the DNP.
• The Nurse Anesthetist Career What a nurse anesthetist does, the critical-care experience programs want first, and why anesthesia is the one nursing role that requires a doctorate.
• DNP vs DNAP For Nurse Anesthesia DNP vs DNAP: both titles lead to the same CRNA exam and license. How many programs award each, and the one accreditation difference between them.
• DNP vs MD: Two Doctorates, Two Professions DNP vs MD: a nursing doctorate and a medical degree lead to different licenses. Training, residency, scope and federal pay data, compared side by side.
• Is A DNP A Doctor? A DNP holds a doctorate and is not a physician. What the title means academically, what it does not mean clinically, and why some states legislate on it.