Patient presents with complaints consistent with perirectal abscess.  Symptoms include anorectal pain, perianal pain, rectal pain, throbbing pain, and tenderness to palpation in the perirectal area.  Associated symptoms may include fever, chills, malaise, constipation, anal discharge, and purulent drainage.  Physical examination reveals a palpable, fluctuant mass in the perirectal region, with possible erythema, edema, and induration.  Differential diagnoses considered include anal fistula, pilonidal cyst, hidradenitis suppurativa, and Crohn's disease.  Diagnosis of perirectal abscess is confirmed by physical examination findings.  Treatment plan includes incision and drainage of the abscess under local anesthesia, or in some cases, general anesthesia.  Patient education provided regarding wound care, pain management, and follow-up appointments.  Potential complications discussed include recurrence, fistula formation, and sepsis.  ICD-10 code K61.0, perirectal abscess, is documented for billing and coding purposes.  CPT codes for incision and drainage will be determined based on the complexity of the procedure performed.  Follow-up care is crucial for monitoring healing and identifying any potential complications.