A bulge where muscle tissue pushes through its surrounding sheath.
Because there is only one rating level under this code — 10% — the key evidence is what establishes that the hernia is extensive and that no other injury to the muscle is present. Medical records documenting the size and location of the hernia, along with a physician's description of it as extensive, would directly address the rating criteria. Imaging results or operative reports that show the scope of the herniation can support that finding. Records confirming the absence of additional muscle damage help place the condition under this specific code rather than a broader muscle-injury code. Statements from you or those who know you describing how the hernia affects your physical activities can add context, though the rating itself turns on the clinical findings rather than functional loss.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.