Quick Definition
221(g) is a US consular hold indicating additional documents or security checks are needed before a final visa decision. It is not an outright refusal — most 221(g) cases resolve positively within 2–16 weeks. STEM applicants, certain nationalities, and incomplete files trigger 221(g) most frequently.
221(g) Administrative Processing — Full Explanation
Check status at ceac.state.gov. Respond promptly to any document requests. Common triggers: nuclear/chemistry/aerospace fields, flags in security databases, or administrative gaps. Inform your university's DSO — they may push the I-20 program start date forward.
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