Patient presents with acute onset of lower abdominal pain, potentially consistent with a ruptured ovarian cyst.  Symptoms include sharp, stabbing, or sudden pelvic pain, possibly radiating to the lower back or thigh.  The patient may report accompanying symptoms such as nausea, vomiting, lightheadedness, or dizziness.  Onset of pain may be related to strenuous activity or intercourse.  Pelvic examination may reveal tenderness and guarding.  Differential diagnosis includes ectopic pregnancy, appendicitis, pelvic inflammatory disease, and ovarian torsion.  Ultrasound imaging is indicated to evaluate for the presence of free fluid in the pelvis, suggestive of a hemorrhagic ovarian cyst rupture.  Laboratory studies including a complete blood count and human chorionic gonadotropin may be performed to rule out other conditions.  Management depends on the severity of the symptoms and ultrasound findings.  Treatment may range from conservative management with pain medication and observation to surgical intervention such as laparoscopy or laparotomy for persistent pain, hemodynamic instability, or suspected complications.  Follow-up care includes monitoring for resolution of symptoms and potential recurrence.  ICD-10 code N26.1 (Rupture of ovarian cyst) is appropriate for this diagnosis.  Medical billing codes for services rendered will depend on the specific diagnostic and therapeutic procedures performed.  This documentation is for electronic health record use and reflects a typical patient presentation for this condition.  It is essential to tailor the specific details to the individual patient's case and clinical findings.