general cpt/dx coding question

When a patient comes in for "back pain" and all that is in the "notes is re: the back pain however under his assessment he uses other codes that the patient has but is not being seen for and uses them also for "billing" of the visit. Isn't this incorrect billing? Shouldn't the other dx's be there somewhere else instead of just the assessment?. Eg:some of the others dx's,,,impotence hyperlipidemia,hemorrhoids, CKD just a few he used. We also started to use 2010F,3008F to "add" extra dx's for the billing when patients are being seen for more than a few things. Is this ok to do?. Thanks sorry so long.