Patient presents with complaints consistent with orchitis.  Symptoms include testicular pain, swelling, and tenderness, possibly accompanied by scrotal erythema and edema.  Onset of symptoms was (onset date or duration).  Patient reports (presence or absence) of fever, chills, malaise, nausea, and vomiting.  Associated symptoms such as dysuria, urinary frequency, or urethral discharge are (present or absent).  Physical examination reveals (size, consistency, and tenderness of affected testicle), positive Prehn sign (present or absent), and (presence or absence) of epididymal involvement suggesting epididymo-orchitis.  Differential diagnosis includes testicular torsion, inguinal hernia, and other causes of acute scrotum.  Laboratory studies ordered include (e.g., urinalysis, complete blood count, sexually transmitted infection testing).  Ultrasound of the scrotum was performed and revealed (ultrasound findings).  Based on clinical presentation, physical exam findings, and laboratory results, the diagnosis of orchitis is established.  The likely etiology is (e.g., viral, bacterial, mumps, sexually transmitted infection).  Treatment plan includes (e.g., bed rest, scrotal support, analgesics, antibiotics if bacterial etiology suspected, antiviral medication if indicated).  Patient education provided regarding disease process, treatment plan, potential complications such as infertility, and follow-up care.  Patient instructed to return for re-evaluation in (duration) to assess treatment response and monitor for complications. ICD-10 code N51.1 (or specify other if applicable) is assigned for orchitis.