A commission physical is the medical exam a state or tribal athletic commission requires before it will license a fighter to compete, and it covers three broad things: bloodwork for transmissible disease, a basic check of vital organs and vision, and — for older fighters or those with a lot of rounds in their career — a closer look at brain health specifically. No commission skips this step, but the exact list of tests varies more between states than most fans assume, because each commission writes and enforces its own rules.
Bloodwork is the one constant
Every jurisdiction that regulates MMA requires a blood panel to screen for HIV, Hepatitis B, and Hepatitis C, usually drawn within a set window before the event rather than on fight day itself. This single requirement is close to universal because the risk it manages — a cut or nosebleed exposing an opponent to blood-borne disease — exists in every fight regardless of which state it happens in.
A positive result on any of those three tests typically means the commission will not license the fighter for that bout, and in some jurisdictions not at all until further medical review. This is one of the few pieces of the physical that doesn't flex much by commission, because the underlying public-health logic is the same everywhere.
Vitals, vision, and a general orthopedic check
Beyond bloodwork, a commission doctor runs through the kind of exam a physical for any contact sport would include: blood pressure, heart rate, a listen to the heart and lungs, a basic vision screening, and a check for anything structurally wrong — a joint that doesn't move the way it should, a healing fracture, a hernia. None of this is unique to combat sports, but it matters more here because a fighter who passes out, has a cardiac event, or re-breaks a bone mid-fight is a much more acute problem than the same issue showing up on a treadmill.
Some commissions also require a dilated eye exam specifically, rather than the basic vision chart used in a general physical, because a fighter can develop a retinal issue from repeated blows to the head without noticing any change in day-to-day vision. That kind of damage sometimes only shows up when an ophthalmologist looks directly at the retina.
Why age and round count change the exam
This is where commission physicals stop looking like a standard check-up and start looking specific to the sport. Fighters past a certain age, or who have logged a large number of professional rounds over their career, are commonly required to go further: a detailed neurological exam from a licensed neurologist, sometimes alongside brain imaging like an MRI or CT scan, to screen for damage that wouldn't show up on a basic reflex-and-coordination check.
The logic is straightforward even if the specific cutoffs differ by state: cumulative blows to the head are a cumulative risk, and a commission doctor has no way to see that risk by simply watching a 40-year-old veteran walk a straight line in the exam room. A scan looks for structural changes a basic exam can't catch, and it's the closest thing the sport has to checking the odometer rather than just listening to the engine run.
This is also where licensing gets complicated for fighters moving between states, since one commission's threshold for requiring a neurological workup isn't automatically honored by the next one a fighter fights in. The broader licensing process that this slots into — and why it has to be repeated every time a fighter changes jurisdictions — is covered in how a fighter gets licensed to fight in a new state or country.
Why the requirements aren't the same everywhere
MMA has no single national regulator the way some other sports do, so there's no one federal rulebook saying exactly which tests every fighter needs. Instead, each state or tribal commission writes its own medical rules, and those rules reflect that commission's own risk tolerance, budget, and medical staff, not a shared national standard.
In practice, this means a fighter who clears one commission's physical without a neurological workup might get asked for one somewhere else, purely because of where the event happens to be held. It's not that one commission is being careless and another cautious — it's that MMA regulation, unlike a sport with a single global governing body, is built state by state, the same way boxing has operated for decades in the United States.
What happens when something turns up
A flagged result doesn't automatically end a fighter's career, but it almost always ends their participation in that specific event. Bloodwork concerns typically route to further private medical testing rather than a public explanation, which is part of why a late pullout sometimes gets announced with no detail beyond "medical reasons." A flagged neurological or imaging result can trigger a longer process: additional specialist review, a required waiting period, or in some cases a permanent red flag in that commission's system that follows the fighter to other jurisdictions through shared medical suspension lists.
That last point is worth knowing, since it's part of why a flagged physical in one state can quietly affect a fighter's ability to get licensed somewhere else later, even without a formal, publicly announced suspension.
The one thing worth taking from this
The physical isn't a formality a fighter simply shows up and passes — it's the last real checkpoint standing between a fight getting made and a fighter actually being cleared to take it, and it's part of why a bout agreement everyone assumed was locked in sometimes still falls apart during fight week for reasons that are never fully explained publicly. Knowing that the standard shifts by commission also explains why the same fighter can look routinely cleared in one state and face extra scrutiny in the next, without either outcome meaning something went wrong.