Medicare’s 2027 Anesthesia Conversion Factor: $20.1056, Down 1.9%

What The 2027 Anesthesia Conversion Factor Pays

CMS prints the 2027 anesthesia conversion factor in the regulatory impact analysis of the final rule: “We estimate the CY 2027 anesthesia qualifying APM CF to be 20.3068 and the CY 2027 anesthesia nonqualifying APM CF to be 20.1056.” The word is “estimate,” and the 2026 figures were published the same way. The table sets them side by side. The 2026 numbers come from the CY 2026 final rule; the changes are our calculation, not CMS’s.

The dollar drop is 39 cents for most clinicians and 29 cents for qualifying participants. That sounds like nothing until you remember what it multiplies, which the next section shows.

Key Dates For The 2027 Anesthesia Conversion Factor

How Medicare Turns The Factor Into A Payment

Medicare multiplies this factor by an anesthesia case’s base and time units to get its payment, so every anesthesia service it pays for moves with it, before anything else changes. Anesthesia is paid differently from the rest of the fee schedule. The rule says it directly: anesthesia services do not have relative value units or payment amounts in CMS’s payment files. Instead, under 42 CFR 414.46, the fee schedule amount for an anesthesia service is the sum of allowable base units and time units, multiplied by an anesthesia-specific conversion factor. One time unit is 15 minutes of anesthesia time. Medicare pays the lesser of the actual charge or that fee schedule amount.

So the factor is the dollar value of one unit. The table uses three invented case sizes, not real procedure codes, to show what 39 cents per unit does at the nonqualifying factor. It ignores every other adjustment Medicare applies, so read it as an illustration of the factor alone.

A 15-unit case loses $5.88 and a 20-unit case loses $7.84. Each case is a small loss. Across a year of Medicare cases, it is the percentage that adds up. The rule does not say how any employer will respond, so we do not predict it.

Why The Anesthesia Factor Fell Less Than The Main Factor

The main fee schedule conversion factor falls further than the anesthesia one. CMS’s summary says the nonqualifying factor drops $0.77, or 2.3%, from $33.4009 to an estimated $32.6286, and the qualifying factor drops $0.62, or 1.8%, from $33.5675 to $32.9548.

Two things move the main factor, and CMS names both. The 2.5% increase Congress provided for 2026 does not continue: in the rule’s words, CMS took the 2026 factors “without the payment increase of 2.50 percent provided by statute that applied to services furnished from January 1, 2026 through December 31, 2026.” Then CMS applied a budget neutrality adjustment of negative 0.12% and the annual update, which is 0.25% for most clinicians and 0.75% for qualifying participants.

The anesthesia factors “reflect the same overall PFS adjustments with the addition of anesthesia-specific PE and MP adjustments,” meaning practice expense and malpractice adjustments. The rule does not print the size of those, so we cannot tell you why the anesthesia factor ends up 0.4 percentage points better off than the main one. We can only say the gap is there.

Which Of The Two Factors Applies To A Clinician

Since 2026 there are two conversion factors, a split that comes from the statute. One applies to services furnished by a qualifying participant in an advanced alternative payment model, as defined in section 1833(z)(2) of the Social Security Act. The other applies to everyone else, and CMS calls it the nonqualifying factor. The qualifying factor gets a larger annual update, 0.75% rather than 0.25%.

The rule does not say what share of anesthesia clinicians qualify, and it does not list CRNAs as being in or out of the qualifying group. Whether an anesthesia clinician is a qualifying participant depends on the alternative payment model the clinician’s group takes part in, so a CRNA would learn which factor applies from the employer or billing group, not from this rule. For most readers still in school, the nonqualifying figure of $20.1056 is the one to keep in mind.

What The Rule Leaves Alone For Anesthesia

CMS had one anesthesia-specific question on the table and left the anesthesia rules as they were. The RUC, the committee that recommends values for fee schedule services, asked CMS to give three anesthesia codes, CPT 01953, 01968 and 01969, a ZZZ global period, the label the fee schedule uses for add-on codes. Anesthesia codes all carry the XXX global period today. Several commenters opposed the change, saying anesthesia is valued on start and stop times and that an assigned global period could lead to an average in place of real times. CMS agreed, writing that “there are unique aspects to the anesthesia codes,” and it is not finalizing a change for those three codes.

The rule’s text has no section on two rules CRNAs and anesthesiologists work under, medical direction of CRNAs and the teaching anesthesiologist payment rule. Both are set out in 42 CFR 414.46, and the rule text does not mention them. Our guide to CRNA vs anesthesiologist explains how those roles share cases in practice.

The CRNA Comments CMS Sent To Future Rulemaking

CRNAs show up in this rule in one place, a response to a comment. The Ambulatory Specialty Model has a low back pain cohort that includes physicians who are anesthesiologists, and CMS did not include nonphysician practitioners in the model. A commenter recommended that CRNAs be added to it. CMS answered that the comment was “outside the scope of the proposed rule,” pointed readers to the CY 2026 rule for why it left out nonphysician practitioners such as CRNAs, and said that if it considers adding them later, “we would do so through notice-and-comment rulemaking.”

That is a closed door for 2027 and an open one in principle. Nothing changes for CRNAs on January 1. A change would have to be proposed first, and the public would get a comment period.

A separate commenter, supporting the proposed small-practice exemption from core measure reporting in the Merit-based Incentive Payment System, asked CMS to consider “the unique needs of small and rural anesthesia practices.” CMS replied to the group of commenters in general terms, saying it would keep considering the impact on small practices, and it finalized the exemption as proposed, starting with the 2027 performance period. That policy covers small practices of every kind; it is not specific to anesthesia.

How Firm An Estimated Factor Is

The rule is final and takes effect January 1, 2027, so the policies in it are settled. The conversion factors are described in the rule as estimates, computed from the adjustments it sets out. If you are checking a number before an offer or a budget, confirm it against the CMS payment files that accompany the rule once they are posted for the new year rather than relying on this story. We will recheck this page against the rule on January 4, 2027, and note any change.

It also helps to be clear about the limits of what a conversion factor tells you. It is one input to what Medicare pays for an anesthesia service. It is not an anesthesia clinician’s pay, and the rule says nothing about what any employer will pay a CRNA or an anesthesiologist. For what the occupation earns, see our CRNA salary guide, which is built from federal wage data and not from this rule.

What This Means For DNP Students

Nothing in this rule changes what you can do as a CRNA, how you train, or whether a program is worth applying to. It changes the dollar value of a unit of anesthesia care Medicare pays for, by about 1.9% for most clinicians. That is a real cut across a large volume of cases, and it is smaller than the 2.3% headline for the rest of the fee schedule.

What a practice does with a lower rate is a question for the employers you would interview with, and the rule gives you no way to guess. Reasonable things to ask are how much of the group’s revenue comes from Medicare, and whether the group takes part in an advanced alternative payment model, which decides which of the two factors applies. The factor also does not decide the earnings you will see in the pay data, which come from a different source and describe a different thing.

If you are still choosing a path, our guide to the nurse anesthetist career covers the day-to-day work, CRNA vs nurse practitioner compares the two roles, and our ranking of DNP nurse anesthesia programs compares the schools.