Do you have to have deployed to get a service-connected disability rating?

No. Service connection under 38 CFR 3.303 does not require that a veteran deployed to a combat zone or served overseas at all. What matters is whether there is (1) a current diagnosed disability, (2) an in-service event, injury, or illness, and (3) a medical nexus linking the two. That in-service event can happen anywhere a service member is performing military duties — basic training, a stateside duty station, a training exercise, physical training, or day-to-day garrison activities. Combat deployment is only relevant to a narrower set of rules, such as the combat presumption under 38 USC 1154(b), which relaxes the evidentiary burden for combat veterans claiming injuries consistent with combat circumstances, and to certain presumptive exposure statutes (like the PACT Act) that apply to specific theaters or locations. Neither of these rules means deployment is a prerequisite for service connection generally; they are exceptions that make proving certain claims easier for those who qualify, not gatekeeping requirements for everyone else.

Once a disability is already service-connected and rated, that determination stands on its own. A treating provider's assumption about how or where an injury occurred has no bearing on the existing rating unless the VA reopens or reviews the claim, which normally happens only through a new adjustment, a scheduled reexamination, or if the veteran files something like a claim for increase. A doctor asking about deployment history for treatment-planning purposes is not, by itself, a threat to a current rating.

At the Board of Veterans' Appeals, across issues decided from 1992 to July 2026, service-connection issues (2,302,001) came out 18.8% granted, 30.2% denied and 45.7% remanded (VetAid's Board outcome rates). These are outcomes for cases that were already appealed, not the odds of winning an initial claim, and appealed cases are not a random sample of all claims. Those figures describe outcomes for cases that were already denied and then appealed — not the odds of an initial claim succeeding — and appealed cases are a self-selected group, not a random sample of all claims.

If a rated disability needs treatment, that treatment should proceed on its own medical merits regardless of deployment history. If a veteran is worried a rating could be reviewed or reduced, the concrete next step is to request a copy of the treatment notes and the disability rating decision (rating code sheet) to confirm the service-connection basis on file, and if a reduction proposal is ever issued, respond within the given timeframe and consider requesting a Higher-Level Review or filing VA Form 20-0996.