Not to be confused with mean corpuscular hemoglobin concentration, although they are predictably correlated in healthy states. The mean corpuscular hemoglobin (MCH) , or mean cell hemoglobin (MCH), is the average mass of hemoglobin per red blood cell in a sample of blood.It is reported as part of a standard complete blood count.ot to be confused with mean corpuscular hemoglobin concentration, although they are predictably correlated in healthy states. The mean corpuscular hemoglobin (MCH) , or mean cell hemoglobin (MCH), is the average mass of hemoglobin per red blood cell in a sample of blood.