What usually happens next
Nothing to act on alone; with a low hemoglobin, a normal MCV can still hide mixed causes, which the RDW helps show.
When an MCV can read wrong
A mix of causes can cancel out: iron deficiency (small cells) with low B12 (large cells) can give a normal MCV. Cold agglutinins and very high glucose can make it read falsely high on the analyser.
Read it with
Nearby results
Have the rest of your results?Have your results? Read them free.Drop in your lab report and see every marker explained in plain words, placed on the body, against your lab's range. It's read on your device: nothing is uploaded and nothing is kept.Read my results

Questions
Is an MCV of 87 fL normal?
An MCV of 87 fL is in the usual 80 to 100 fL range. The usual range is about 80 to 100 fL.
Worked out by LifeFrom from the usual lab range (StatPearls, American Family Physician), and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.