Undiagnosed new problem with uncertain prognosis: When does a problem go from being new to chronic? For example, patient has an elevated PSA at their new patient appointment (new problem), some tests are ordered, then they follow up in one month. Could we use "undiagnosed new problem" again since we are still trying to diagnose and figure out what's going on? Or is it no longer a new problem because we have seen the patient before?