Table 2.

Guide for Classifying Appropriate Antibiotic Prescription: using ICD-10 codes to classify appropriate diagnosis of disease according to the symptoms and signs presented in the patients in the sample

ICD-10 code	Criteria for Appropriate Antibiotic Prescription
H65 Nonsuppurative otitis media H66 Suppurative and nonspecified otitis media	H65 must meet both conditions: presence of Acute Bilateral Otitis media AND age < 2 H65 or H66 with presence of otorrhea
J01 Acute sinusitis	Must meet all conditions: Fever of >38C°, purulent discharge and facial pain
JO2 Acute pharyngitis JO3 Acute tonsillitis	Must meet 3 of the following CENTOR criteria: ­ Presence of tonsilar exudate ­ Presence of painful anterior cervical lymphadenopathy or lymphadenitis ­ Fever (> 38°) ­ Absence of cough
JOO Acute nasopharyngitis [common cold] JO1 Acute sinusitis JO2 Acute pharyngitis JO3 Acute tonsillitis JO4 Acute laryngitis and tracheitis JO5 Acute obstructive laryngitis [croup] and epiglotitis JO6 Acute upper respiratory infections of multiple and unspecified sites J10 Influenza due to other identified influenza virus J11 Influenza due to unidentified influenza virus	Must meet any of the following criteria: ­ Presence of one or more of the following comorbidities: Cardiac, Pulmonary, Renal, Hepatic, Neuromuscular, Immunosuppression, Cystic Fibrosis, Diabetes Mellitus. - OR ­ Age < 2 years old AND history of prematurity OR ­ Age > 65 years old AND presence of cough AND two or more of the following: ▪ Hospitalized in 2014 ▪ Diabetes mellitus ▪ History of cardiac arrest ▪ Current use of corticosteroids OR ­ Age > 80 years old AND presence of cough AND one or more of the following: ▪ Hospitalized in 2014 ▪ Diabetes mellitus ▪ History of cardiac arrest ▪ Current use of corticosteroids

There are no ICD-10 codes for J07 and J08. J09 excluded because it refers to influenza and pneumonia