To be admitted to the United States, either as a nonimmigrant or an immigrant, an alien must not be excludable under the Immigration and Nationality Act ("INA"). Grounds of inadmissibility and available waivers are discussed below.

Medical Grounds

Criminal Grounds

Security and Related Grounds

Public Charge Grounds

Labor Certification and Qualifications for Physicians and Health Care Workers

Illegal Entrants and Immigration Violators

Documentation Requirements

Ineligible for Citizenship

Aliens Previously Removed or Unlawfully Present in the United States

Miscellaneous

General Waiver for the Temporary Admission of Nonimmigrants