MCHC Blood Test: Meaning, High, Low & Range

MCHC Blood Test Normal Range

Exact ranges vary by lab, but many reports use an approximate adult reference range around 32-36 g/dL.

Low MCHC Causes

Low MCHC is commonly called hypochromia, meaning red blood cells appear paler because they carry less hemoglobin. The most common pattern is iron deficiency, especially when MCHC is low with low MCV, high RDW, low ferritin, and low transferrin saturation.

• Iron deficiency from diet, heavy periods, GI blood loss, pregnancy, or malabsorption
• Thalassemia trait, especially if MCV is very low with a relatively preserved RBC count
• Anemia of chronic inflammation, usually interpreted with CRP and ferritin

Related: iron blood test and MCV blood test.

When MCH and MCHC Are Both Low

When both MCH and MCHC are low, your red blood cells are carrying less hemoglobin than normal — the classic hypochromic pattern, and most often a sign of iron deficiency. MCH measures the average amount of hemoglobin per red cell, while MCHC measures how concentrated that hemoglobin is; low values together mean the cells are both underfilled and dilute.

The most useful next step is to read MCV and RDW alongside them:

• Low MCH + low MCHC + low MCV: the textbook microcytic, hypochromic picture of iron-deficiency anemia. Confirm with ferritin, transferrin saturation, and RDW (usually high in iron deficiency).
• Low MCH + low MCHC with a very low MCV but normal RDW: raises the possibility of thalassemia trait rather than iron deficiency, especially with a normal or high red blood cell count.
• Low MCH + low MCHC with a normal MCV: often early iron deficiency or anemia of chronic inflammation; recheck ferritin and CRP.

Both low together is not a separate disease — it is a pattern that points toward how the body is building red cells. Pair it with iron and ferritin testing and the MCV blood test to find the cause.

High MCHC Causes

High MCHC is less common than low MCHC. Persistent high MCHC can be seen with hereditary spherocytosis, autoimmune hemolysis, burns, or significant sample/lab artifact. Because MCHC is calculated, a single high value should usually be confirmed before assuming disease.

Ask whether hemoglobin, bilirubin, LDH, haptoglobin, reticulocyte count, and a peripheral smear are appropriate if high MCHC persists or symptoms suggest hemolysis.

Conclusion: MCHC Blood Test Results Need Context

An MCHC blood test is most useful when read with MCV, hemoglobin, hematocrit, RDW, ferritin, and iron saturation. Do not treat the number in isolation. Use it as a clue in the larger anemia pattern.

Read the full blood test interpretation guide to connect MCHC with the rest of your CBC.