# Grounds of Inadmissibility: What Can Keep You Out > Inadmissibility is why a visa or green card can be denied. The main categories the law lists — health, criminal, public charge, unlawful presence — and why waivers matter. - Source: https://carlosmaury.law/news/grounds-of-inadmissibility-explained - Author: Carlos Maury Law - Published: 2026-06-23 - Topics: grounds of inadmissibility, 8 U.S.C. 1182, inadmissible to the United States, visa denial reasons, public charge One statute quietly shapes an enormous share of immigration cases: the law that lists the **grounds of inadmissibility.** These are the reasons a person can be **denied a visa, denied entry, or denied a green card** — even when they otherwise qualify. Understanding whether a ground of inadmissibility applies, and whether a waiver might overcome it, is often the central question in a case. This guide explains the main categories in plain English. This is general information, not legal advice. The categories below come directly from **[8 U.S.C. § 1182](https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title8-section1182&num=0&edition=prelim)** — the section of the Immigration and Nationality Act (INA § 212) that lists the classes of people ineligible for visas or admission — as published in the U.S. Code by the Office of the Law Revision Counsel. Whether any of it applies to a specific case is a legal judgment that depends on the facts. ## What "inadmissible" means The statute opens by stating the core rule: people who are inadmissible under its listed grounds are **"ineligible to receive visas and ineligible to be admitted to the United States."** In practice, inadmissibility comes up in two main settings: when someone applies for a **visa or entry** from outside, and when someone already here applies for a **green card** (adjustment of status), which requires being admissible. Being inadmissible does not always mean the door is permanently closed — many grounds have **waivers** — but it does mean a specific legal barrier must be addressed. ## The main categories Section 1182 organizes inadmissibility into several broad categories. The most commonly encountered include: - **Health-related grounds** — including a **communicable disease of public health significance**, certain missing vaccinations, and specific physical or mental disorders posing a threat, and drug abuse or addiction. - **Criminal grounds** — including conviction of (or admitting) certain crimes, such as **crimes involving moral turpitude** and **controlled-substance offenses**, and other specified criminal conduct. - **Security grounds** — including people the government has reasonable grounds to believe seek to engage in **espionage, sabotage, terrorist activity**, or similar. - **Public charge** — a person who, in the government's opinion, is **likely to become primarily dependent** on the government for subsistence may be inadmissible on this ground. - **Labor certification** — certain people seeking to work must have the required labor certification. - **Illegal entrants and immigration violators** — including people **present without admission or parole**, and the **unlawful presence** bars (below). - **Documentation requirements** — an immigrant who lacks a valid, unexpired visa or required travel document at the time of applying for admission. Each of these categories contains detailed sub-rules, exceptions, and definitions — which is why applying them correctly is a legal task, not a checklist. ## Unlawful presence: a trap that surprises people Among the most consequential grounds are the **unlawful presence bars.** In general terms, a person who accrues a certain amount of unlawful presence in the United States and then **departs** can trigger a bar to returning — commonly **3 years** (after more than 180 days of unlawful presence) or **10 years** (after a year or more), depending on the length. This is one of the most misunderstood areas of immigration law, because the bar is often triggered **by leaving.** Someone who believes departing to "fix" their status abroad can unintentionally trigger a multi-year bar. This is precisely the kind of trap that makes legal advice essential before taking action. ## Why waivers matter Because inadmissibility can block otherwise-eligible people, the law provides **waivers** for many (not all) grounds. A waiver is a formal request asking the government to forgive a specific ground of inadmissibility, usually on showing something like hardship to a qualifying relative. The availability and requirements of a waiver depend entirely on **which** ground applies — some grounds have generous waivers, some have narrow ones, and some have none. Figuring out (1) whether a ground of inadmissibility applies, and (2) whether a waiver is available and winnable, is often the heart of a difficult case. ## Why this analysis comes first Because inadmissibility determines whether a visa, entry, or green card is even possible, it is usually the **first thing** that should be analyzed in a case — before filing anything. Identifying a ground of inadmissibility early, and mapping out any available waiver, can be the difference between a smooth case and a denied one or an accidental multi-year bar. ## Talk to a lawyer before you file or travel If you are unsure whether a ground of inadmissibility might apply to you — because of a criminal issue, prior immigration history, time out of status, or travel plans — a careful review of the facts is worth doing first. Carlos Maury Law is a national firm of former U.S. Immigration Judges. To talk about your situation, call **(213) 769-0050**. **We speak Spanish.** ## Frequently Asked Questions ### What does it mean to be "inadmissible"? Under 8 U.S.C. § 1182, being inadmissible means you fall into one of the categories the law says makes a person ineligible to receive a visa, be admitted to the United States, or, in many cases, adjust status to a green card — even if you otherwise qualify. ### What are the main grounds of inadmissibility? The statute lists several broad categories, including health-related grounds, criminal grounds, security grounds, public charge, labor certification, illegal entry and immigration violations (including unlawful presence bars), and documentation requirements. Each contains detailed sub-rules. ### How can leaving the U.S. trigger a bar? Under the unlawful presence rules, a person who has accrued unlawful presence and then departs can trigger a bar to returning — commonly 3 years or 10 years depending on how long. Because the bar is often triggered by leaving, it is critical to get advice before departing. ### Can a ground of inadmissibility be waived? Sometimes. The law provides waivers for many grounds — but not all — and the requirements depend entirely on which ground applies. Determining whether a waiver is available and winnable is a key part of analyzing a case. --- This article is general information only and is not legal advice. Reading it does not create an attorney–client relationship. Immigration law is complex and fact-specific; consult a qualified immigration attorney about your situation. Prior results do not guarantee a similar outcome. Attorney advertising. --- *General legal information from Carlos Maury Law — not legal advice. https://carlosmaury.law/news/grounds-of-inadmissibility-explained*