Great bodily harm and serious bodily injury describe nearly identical concepts under criminal law, and the choice between the two phrases is usually a matter of which jurisdiction’s statute is doing the talking. Federal law and the Model Penal Code use “serious bodily injury.” Many state codes, especially older ones, use “great bodily harm” or “great bodily injury.” A handful of states use both and treat them as different severity tiers. What actually controls a case is not the label but the specific statutory definition attached to it.
Are the Two Terms the Same Thing
In most situations, yes. Both phrases refer to injuries that go well beyond ordinary bruises or cuts: injuries that threaten life, cause lasting disfigurement, or take away the use of a body part or mental faculty for an extended period. A prosecutor in a federal courtroom charging assault will say “serious bodily injury.” A prosecutor in a state courtroom one block away may say “great bodily harm” while meaning the same thing.
The complication is that terminology is not standardized across states. Two states can use the same phrase and define it differently. One might require an injury that creates a substantial risk of death; another might apply the label to any injury needing more than minor medical treatment. And in states that use both terms, “great bodily injury” sometimes sits above “serious bodily injury” as a higher threshold that triggers additional sentence enhancements. So the practical rule is simple: read the statute. The exact wording of the definition in the charging jurisdiction controls what the prosecution has to prove, no matter which phrase appears on the indictment.
What Prosecutors Have to Prove
Although the labels vary, the underlying criteria recur across federal and state statutes. The most widely referenced federal definition, found in 18 U.S.C. § 1365, treats an injury as serious bodily injury when it involves any of the following:1Office of the Law Revision Counsel. 18 U.S.C. 1365 – Tampering With Consumer Products
- A substantial risk of death
- Extreme physical pain
- Protracted and obvious disfigurement
- Protracted loss or impairment of the function of a bodily member, organ, or mental faculty
A substantial risk of death is the clearest trigger. If emergency responders or surgeons believed the victim might not survive, the threshold is almost certainly met. Protracted and obvious disfigurement covers lasting changes to appearance that cannot be fully repaired, such as severe scarring. Protracted loss of function applies when a victim loses the use of a limb, organ, or cognitive ability for an extended period, even if the loss is not permanent.
Judges instruct juries on these criteria, and whether an injury clears the bar is a factual question for the jury or judge to decide. Forensic medical testimony usually does the translating: a surgeon explains the physiological impact, and the factfinder decides whether that impact fits the statutory language.
Why the Specific Statute Matters
Even within federal law, the definition is not uniform. Congress never wrote a single universal version. Different statutes use slightly different wording tailored to the crimes they cover.
Section 1365’s four-part definition is the one most other federal assault statutes borrow.2Office of the Law Revision Counsel. 18 U.S.C. 113 – Assaults Within Maritime and Territorial Jurisdiction But 18 U.S.C. § 2246, which governs federal sexual offenses, adds “unconsciousness” as a standalone qualifying condition that § 1365 does not include.3Office of the Law Revision Counsel. 18 U.S.C. 2246 – Definitions for Chapter 109A Federal drug law uses a third version at 21 U.S.C. § 802, which drops “extreme physical pain” while keeping risk of death, protracted disfigurement, and protracted loss of function.4Office of the Law Revision Counsel. 21 U.S.C. 802 – Definitions
The differences matter in practice. An injury that qualifies under one statute might not under another, and a defense attorney who identifies the applicable definition can challenge whether the evidence actually fits. The same reasoning applies at the state level, where variation is even wider.
Injuries Courts Routinely Find Qualify
Certain injuries show up so often in reported cases that they function as near-automatic qualifiers. Bone fractures top the list, particularly compound fractures that break through the skin and fractures of the skull or facial bones. Internal organ damage, such as a ruptured spleen, punctured lung, or lacerated liver, consistently qualifies because it creates an immediate threat to life and almost always requires surgery.
Second- and third-degree burns meet the standard when they destroy deeper tissue layers or cover a significant area of the body. Wounds requiring extensive surgical repair, or those leaving visible permanent scars, fall under the disfigurement prong. Traumatic brain injuries are frequently cited as well, especially when the victim suffers cognitive impairment, memory loss, or extended unconsciousness.
These cases typically involve emergency medical intervention such as intubation, emergency surgery, or long hospital stays. Medical records and expert testimony carry the proof. The more invasive the treatment, the easier the threshold is to establish.
Strangulation and Injuries Without Visible Marks
Strangulation sits in its own category because it can cause serious internal harm while leaving few visible signs. Federal law addresses it specifically through 18 U.S.C. § 113(a)(8), which makes strangulation or suffocation of a spouse, intimate partner, or dating partner a standalone federal offense punishable by up to ten years in prison. The statute defines strangulation as intentionally impeding normal breathing or blood circulation by applying pressure to the throat or neck, regardless of whether a visible injury results.2Office of the Law Revision Counsel. 18 U.S.C. 113 – Assaults Within Maritime and Territorial Jurisdiction
The federal sentencing guidelines go further. Amendment 781 added a sentencing enhancement for strangulation of an intimate partner that applies even when no provable bodily injury exists, on the reasoning that this conduct harms victims physically and psychologically and predicts future lethal violence.5United States Sentencing Commission. Amendment 781 The absence of visible injury, in other words, does not reflect the true danger.
Does Psychological Harm Count
Several federal definitions include “protracted loss or impairment of the function of a mental faculty,” which raises an obvious question: can PTSD or severe psychological trauma meet the threshold without a physical injury?4Office of the Law Revision Counsel. 21 U.S.C. 802 – Definitions
The prevailing view in criminal law is that it cannot, on its own. Courts have rejected arguments that PTSD by itself constitutes great bodily harm or serious bodily injury, reasoning that the condition is primarily a mental rather than physical impairment. Some civil courts have gone the other way in insurance and tort cases, but those rulings do not carry over to criminal sentencing. In practice, prosecutors invoking the “mental faculty” prong rely on cognitive impairment traced to a physical mechanism, such as a traumatic brain injury that damages memory or concentration, rather than psychological trauma standing alone.
How the Classification Changes a Sentence
The reason the terminology question matters at all is that the injury classification a jury or judge selects directly controls prison time. Under the federal sentencing guidelines, each step up the injury ladder adds offense levels. For a federal robbery conviction, bodily injury adds 2 offense levels, serious bodily injury adds 4, and permanent or life-threatening bodily injury adds 6.6United States Sentencing Commission. USSG 2B3.1 – Robbery Two levels can mean an extra year or more. Six can mean the difference between a mid-range term and a decade behind bars.
Federal assault resulting in serious bodily injury carries a standalone maximum of ten years in prison.2Office of the Law Revision Counsel. 18 U.S.C. 113 – Assaults Within Maritime and Territorial Jurisdiction When serious bodily injury results from certain drug trafficking offenses, the mandatory minimum jumps to 20 years for a first offense.4Office of the Law Revision Counsel. 21 U.S.C. 802 – Definitions State penalties vary widely, but the pattern holds everywhere. The more severe the injury, the longer the sentence and the fewer options a judge has to go below the floor. That is why defense attorneys fight so hard over which injury category a given set of facts belongs in, and why the choice between “great bodily harm” and “serious bodily injury” in a charging document is never just a matter of vocabulary.