Patient presents with symptoms consistent with mild persistent asthma.  The patient reports daytime asthma symptoms occurring more than two days per week, but not daily, and nighttime awakenings three to four times per month.  Symptoms include intermittent wheezing, shortness of breath, chest tightness, and cough.  These symptoms interfere minimally with normal activity.  Lung function testing reveals a forced expiratory volume in one second (FEV1) of 80-100% of predicted value, with an FEV1 to FVC ratio within normal limits.  Patient denies any recent exacerbations requiring oral corticosteroids.  Medical history is significant for seasonal allergies.  Family history is positive for asthma.  Physical examination reveals clear lung sounds with no wheezes or rhonchi present today.  Diagnosis of mild persistent asthma is confirmed based on symptom frequency, nighttime awakenings, and lung function.  The patient was educated on asthma triggers, proper inhaler technique, and asthma action plan.  Prescribed a daily low-dose inhaled corticosteroid for controller therapy and albuterol rescue inhaler as needed for symptom relief.  Patient advised to follow up in three months for reassessment of asthma control and medication adjustment if necessary.  Differential diagnoses considered included allergic rhinitis, viral upper respiratory infection, and gastroesophageal reflux disease.  ICD-10 code J45.21, mild persistent asthma, was assigned.  Emphasis placed on patient education regarding medication adherence, environmental control measures, and early recognition of worsening symptoms.