Name the reason Walter Bahringer visited medical professionals in July 2009.
reason for visiting medical professionals refers to encounters.REASONDESCRIPTION;  in July 2009 refers to  substr(encounters.DATE, 1, 7) = '2009-07' ;
SELECT T2.REASONDESCRIPTION FROM patients AS T1 INNER JOIN encounters AS T2 ON T1.patient = T2.PATIENT WHERE T1.first = 'Walter' AND T1.last = 'Bahringer' AND T2.DATE LIKE '2009-07%'