Does normal blood count shows vitamin D deficiency?

The diagnosis requires a special blood test.

The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D test. The active form of the vitamin can be measured through the blood. The active form of vitamin D helps control calcium and phosphate levels in the body. The normal range is 30.0 to 74.0 nanograms per milliliter (ng/mL). A lower level indicates vitamin D deficiency.

Many foods and drinks have fortified vitamin D and also many doctor's offices are offering supplementations or at least recomendations for such.

http://www.drlamlabs.com/calcium.php

an abnormal cbc would suggest either iron and or b12 & folate defiency, subsequent tets wouds would confirm this.