43235

Esophagogastroduodenoscopy (EGD), Diagnostic

Esophagogastroduodenoscopy, commonly referred to as an EGD or upper endoscopy, is a diagnostic procedure performed to examine the lining of the esophagus, stomach, and the first part of the small intestine (duodenum). This procedure is conducted using a flexible, fiber-optic endoscope equipped with a light source and a high-resolution camera at its tip. The physician inserts the endoscope through the mouth and advances it under direct visualization. The patient is typically prepared with topical anesthesia for the throat and may receive intravenous sedation or monitored anesthesia care (MAC) to ensure comfort. During the examination, the clinician insufflates air into the gastrointestinal tract to expand the lumen, allowing for a detailed inspection of the mucosal surfaces. The physician looks for abnormalities such as inflammation, ulcers, tumors, or anatomical variations. The code 43235 specifically identifies the diagnostic portion of the exam, which may include the collection of specimens via brushing or washing (cytology) if necessary, but does not include more invasive interventions like biopsies or polyp removals. The scope typically passes through the upper esophageal sphincter, the body of the esophagus, the gastroesophageal junction, the stomach (including the fundus, body, and antrum), and finally through the pylorus into the duodenum. This procedure is critical for investigating symptoms that originate in the upper gastrointestinal tract and is considered the gold standard for mucosal evaluation compared to radiological imaging.

Clinical Indications

  • Persistent upper abdominal pain or dyspepsia
  • Dysphagia (difficulty swallowing) or odynophagia
  • Gastroesophageal reflux disease (GERD) refractory to medical therapy
  • Unexplained weight loss or persistent nausea and vomiting
  • Evaluation of upper gastrointestinal bleeding or occult blood in stool
  • Follow-up for known conditions such as Barrett's esophagus or gastric ulcers
  • Screening for esophageal varices in patients with cirrhosis
  • Investigation of iron deficiency anemia of unknown origin

Procedure Steps

  1. Obtain informed consent and verify the patient's NPO (nothing by mouth) status.
  2. Position the patient in the left lateral decubitus position.
  3. Administer sedation and monitor vital signs throughout the procedure.
  4. Place a bite block in the patient's mouth to protect the teeth and the endoscope.
  5. Insert the flexible endoscope through the oropharynx and advance it into the esophagus under direct visualization.
  6. Insufflate air to distend the esophageal lumen and inspect the mucosal lining.
  7. Pass the endoscope through the gastroesophageal junction into the stomach.
  8. Perform a retroflexion maneuver to visualize the gastric cardia and fundus.
  9. Examine the gastric body and antrum, checking for erosions or lesions.
  10. Advance the scope through the pylorus into the first and second portions of the duodenum.
  11. Perform brushing or washing for specimen collection if cytology is required.
  12. Suction excess air and fluid before withdrawing the endoscope slowly while performing a final inspection.

Coding Guidelines

  • CPT 43235 is a 'separate procedure' designation, meaning it should not be reported when it is an integral component of a more major procedure.
  • If a biopsy is performed during the same session, report 43239 instead of 43235.
  • Do not report 43235 in conjunction with other EGD codes (43236-43259) for the same session unless a distinct, non-overlapping service is performed and modifier 59 is appropriate.
  • For endoscopic retrograde cholangiopancreatography (ERCP), use the 43260-43278 series.
  • If the endoscope is not passed into the duodenum, the procedure may be considered an esophagoscopy (43200) or may require modifier 52 for reduced services if a full EGD was intended.
  • The use of modifier 26 is required if the physician is performing the service in a facility setting and does not own the equipment.

Associated ICD-10 Codes