Question on coding diagnoses

Patient has established history of benign hypertension and iatrogenic hypothyroidism, for which he regularly receives treatment at our practice.

Patient presents for follow-up after hospitalization for renal failure, during which he was diagnosed with multiple myeloma. At time of visit, patient is hypotensive (bp 98/60). Doctor has documented diagnoses of hypertension, multiple myeloma, renal failure and hypotension, although what we're treating the patient for at this visit is the hypotension and hypothyroidism.

I can see including multiple myeloma and renal failure as we have reviewed these conditions and their treatment under another physician with the patient - they seem pertinent diagnoses. I'm leary of coding BOTH hypertension AND hypotension though. Should I code V12.59 for a HISTORY of hypertension instead?

Advice appreciated.

re: Question on coding diagnoses

No, a history means it does not exist anymore. What is the reason for hypotension (maybe adverse effect of drug?). Anyway, you code what you are treating today,("although what we're treating the patient for at this visit is the hypotension and hypothyroidism".), the reason for the visit. Also, Category 403 classifies patients with hypertension and chronic kidney disease (585), renal failure (586), or renal sclerosis (587). If both conditions are present in the patient, a code from category 403 is assigned. No cause-and-effect relationship has to be documented by the physician. Only when the physician specifically documents that the renal disease is not due to the hypertension are these two conditions coded separately. This could be a hypotensive episode 796.3, but the physician must clarify. This is conflicting information.