My platelets have been at 478 and wbc at 13 for a year. im healthy but tired. bmb, blood test, pap, mammogram good. what can it be.

There are several: Reasons for tiredness . Tirerdness alone is a very non specific symptoms that does not give much of clue as to what is wrong . There are certain areas that needs to be looked at including good sleep and adequate diet and exercise . The blood work you have are great but they do not assure that everything is ok . They are merely indicative of certain areas . Please check with your doc if not well.

See specialist.: Persistent high WBC and tiredness would likely need a review by a hematologist/oncologist first. If cleared by him/her then you may need to see a rheumatologist or an endocrinologist.

Fatigue is common...: Your platelet count and WBC are minimally elevated, and i doubt they have anything to do with your symptoms. The list of causes of fatigue is very long. Some other common causes of fatigue that i see in my practice include under active thyroid, depression / stress, and sleep disorders such as sleep apnea. Talk to your doctor.

Early iron lack: Lack of iron can cause fatigue (usually with anemia) and mild elevation in plate count. Normal platelet count 180-250, 000.