CRNA vs Anesthesiologist: How the Two Roles Compare

CRNAs are advanced practice nurses who give anesthesia; anesthesiologists are physicians who specialize in it. Both can give the same anesthetics, but they train on different paths and often work together in a care team.

The anesthesiologist path takes longer and costs more, and it pays more on average. The CRNA path gets you into practice sooner, from a nursing base.

Quick comparison

Training length

CRNA

You need a bachelor's degree, an RN license and at least one year of full-time critical care work. Nurse anesthesia programs then run 36 to 51 months, and all award a doctorate.

Counting a 4-year BSN, ICU time and school, that is at least about 8 years from the start of nursing school. See how to become a CRNA and how long CRNA school is.

Anesthesiologist

After a bachelor's degree, you complete 4 years of medical school. ACGME anesthesiology residencies come in 36-month and 48-month formats. Both include 36 months of clinical anesthesia; the 48-month format adds 12 months of foundational clinical training.

That makes roughly 12 years after high school before independent practice, and more with a fellowship. BLS notes that physician fellowships take 1 to 3 years, depending on the subspecialty.

Cost of training

CRNA programs vary widely in price. In Everything CRNA's School Finder data (October 2026), median total tuition and fees is about $124,700. See CRNA schools by cost and the CRNA school cost calculator.

Medical school costs differ by school and residency status, so check the AAMC and each school for current figures. Residents are paid a salary during residency. CRNA students pay tuition for 3 or more years, so check each program's policy on outside work. Weigh both tuition and lost income when you compare.

Roles and care team models

Anesthesia in the US is delivered in several ways. Which one you see depends on the state, the facility and how it bills.

Anesthesiologist working alone

The anesthesiologist personally performs the whole case. Medicare calls this personally performed and uses the AA modifier.

Anesthesia care team (medical direction)

One anesthesiologist directs CRNAs or anesthesiologist assistants in several rooms at once. Medicare pays for medical direction of up to four concurrent cases.

For each case, the anesthesiologist must meet seven conditions. These include the pre-anesthetic exam, the anesthesia plan, being present for the most demanding parts such as induction and emergence, and staying immediately available.

CRNA without medical direction

A CRNA gives the anesthetic without an anesthesiologist directing the case. Medicare uses the QZ modifier for this.

Under the hospital Conditions of Participation, a CRNA must be supervised by the operating practitioner or by an anesthesiologist. The exception is a state that has opted out of that supervision rule. As of September 2026, 27 states plus DC and Guam have opted out. See CRNA opt-out states.

Where each model is common

AANA says CRNAs make up more than 80% of anesthesia providers in rural counties. It also says half of US rural hospitals use a CRNA-only model for obstetric care. Large urban hospitals more often use care teams.

Pay

BLS Occupational Employment and Wage Statistics for May 2025:

Treat the anesthesiologist figures with care. BLS surveys employees only, so physicians who own their practice or are self-employed partners are left out. The same is true for self-employed and many 1099 CRNAs.

Over a career, compare more than salary. Anesthesiologists start earning later and often carry more debt. CRNAs start earlier but usually have a lower ceiling. See CRNA salary.

Job outlook

BLS projects nurse anesthetist jobs to grow 10% from 2025 to 2035, from 54,500 to 59,800. It projects anesthesiologist jobs to grow 4%, from 41,500 to 43,000. See CRNA job outlook.

Which path should you choose?

The CRNA path may suit you if:

• You are already a nurse, or want nursing as your base
• You want to reach practice sooner and with less debt
• You want the option of rural or independent practice

The anesthesiologist path may suit you if:

• You want to be a physician, with the widest medical training
• You want to lead care teams or work in subspecialties such as cardiac or critical care medicine
• You are ready for medical school and residency

If you want a non-nursing route into anesthesia with a shorter timeline, also read CRNA vs anesthesiologist assistant.

FAQ

Do CRNAs and anesthesiologists do the same job?

They can give the same anesthetics. Their training differs, and roles in a given facility depend on its care model and state law.

Can a CRNA become an anesthesiologist?

Only by going to medical school and completing an anesthesiology residency. There is no bridge program.

Who earns more?

Anesthesiologists. The May 2025 BLS median was $391,490, compared with $236,590 for nurse anesthetists.

This page is general information, not career, legal or financial advice.

Sources

• BLS Occupational Outlook Handbook: Physicians and surgeons
• BLS Occupational Outlook Handbook: Nurse anesthetists, nurse midwives and nurse practitioners
• BLS Occupational Employment and Wage Statistics, May 2025 national data (29-1151, 29-1211)
• ACGME Program Requirements for Graduate Medical Education in Anesthesiology (2025), section 4.1
• eCFR: 42 CFR 415.110, medically directed anesthesia services
• eCFR: 42 CFR 482.52, hospital anesthesia services
• CMS Medicare Claims Processing Manual, Chapter 12 (anesthesia modifiers)
• AANA: CRNA fact sheet
• AANA: Fact sheet concerning state opt-outs (September 2026)
• Everything CRNA School Finder data (October 2026): CRNA school finder