There are five types of white blood cells - Neutrophil, eosinophil, basophil, monocyte and lymphocyte.
The normal monocyte count is 4-11 as you have mentioned. It is high in your case. High count is seen in the recovery phase of many acute infections. It is also seen in diseases like TB, syphilis, brucellosis, Crohn's disease, and sarcoidosis, ulcerative colitis, systemic lupus, rheumatoid arthritis, polyarteritis nodosa, and many hematologic neoplasms.
LD stands for lactic dehydrogenase. Elevated levels denote tissue damage.Its level can be increased in anemia, malignancy, liver disorder, kidney disorder, heart attack, stroke.
Consult your doctor for evaluation.