Hemoglobin tests are used to measure the level of hemoglobin in a person's blood. Hemoglobin is a protein found in red blood cells that carries oxygen throughout the body. These tests are often used to diagnose and monitor conditions such as anemia and certain blood disorders.

There are different types of hemoglobin tests, including complete blood count (CBC) tests, hemoglobin A1C tests, and specific hemoglobin tests for certain conditions.