I agree with OhynO, Perfect; polyurea and diuresis is the right choice for excessive urination.
As regards to Excessive Hunger ie Abnormal hunger, hyperphagia, Polyphagia although differ to some extent in their etiology or causative factor, they almost depict the same act and goes for the same outcome.And for coding excessive Hunger, hyperhunger, abnormal hunger, go with the term Hyperphagia, /and or Polyphagia.
The code is 783.6- Abnormal or increased Appeitite ( as in vol 2)- is the code of Choice
[ Medical conditions (about more than 70), brian disorders causing hyperphagia( Encephlitis, brain Injury, chromophob eadenoma, craniopharyngioma, some brain Tumors) and some physiological causes
of overeating and appetite changes like Strenuous exercise Recovery from illness; and other medical conditions like Hyperthyroidism Hypoglycaemia Depression Hysteria Bulimia Klüver-Bucy syndrome Boredom Medications
Some possible causes of abnormal hunger include: Marijuana - a form of cannabis Cannabis Diabetes - usually if undiagnosed or poorly controlled diabetes Hypoglycemia Hypoglycemic attack Graves Disease Mania Bipolar disease - overeating and excessive appetite when in the manic phase. Intestinal worms Tapeworms Hypothalamic disease. Certain medications - various medications can stimulate appetite ]
Reporting of underlying causes could be important to support, if known, such as diabetes, Kleine Levin Syndrome (a malfunction in the hypothalamus), the genetic disorders Prader-Willi Syndrome and Bardet Biedl Syndrome can cause hyperphagia (compulsive hunger) OR, non medical conditions like Strenuous Exercise, or Convalescence.
Watch out if any condition like that suits your case.