Grounds of Inadmissibility

Reasons written into the law why an individual foreign national would not be permitted to enter the U.S. These reasons might be medical, financial (inability to support oneself here without public assistance), or criminal. These grounds apply to entry into the U.S. for any reason - from a brief visit on a B-1/B-2 visitor via to adjustment of status to permanent residence (though as a practical matter, they are still more likely to be caught at the permanent residence stage in spite of heightened security checks for nonimmigrant visas). Waivers are available for certain grounds of inadmissibility in some circumstances.