When mean corpuscular Hgb is high what does it mean?

A high mean corpuscular hemoglobin (MCH) level indicates that individual red blood cells contain more hemoglobin than normal. This can suggest conditions such as macrocytic anemia, where red blood cells are larger and contain more hemoglobin, often due to vitamin B12 or folate deficiency. It may also occur in certain types of liver disease or in cases of hereditary spherocytosis. However, it's important to interpret MCH values in conjunction with other blood parameters for an accurate diagnosis.