vitamin d testing indications

Does anyone know these? What ICD-9 codes support medical necessity

Everything goes???

Indirectly i do not think there is a list of diagnoses. I get notes from Labcorp if I order a TSH or lipid and forget a good diagnosis but have ordered Vit D with 401.1, 250.00, 633.01, 729.1 and have never gotten asked for another diagnosis. But it cold be that the lab is just eating the cost and not contacting me when they are denied. Aren't there labs that CMS just pays without question, like a CMP or BMP ?