Summary & Overview
CPT 49320: Diagnostic Laparoscopy of Peritoneum and Omentum
CPT code 49320 designates a diagnostic laparoscopy used to inspect the peritoneum and omentum to evaluate causes of abdominal symptoms, often including collection of washings or brushings for cytology. This code matters nationally because diagnostic laparoscopy is a common minimally invasive procedure that guides diagnosis and subsequent management for a range of abdominal and pelvic conditions, affecting utilization, payment policy, and surgical care patterns across payers. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical description, common settings where the service is delivered, and the typical modifiers associated with surgical and diagnostic laparoscopic services. The publication outlines what to expect for coding and billing classification of the procedure, highlights clinical context for use of diagnostic laparoscopy, and flags areas where policy or claims adjudication commonly requires attention (for example, distinguishing diagnostic-only services from concurrent therapeutic procedures). Data not available in the input are noted where applicable. The content is designed for coding professionals, revenue cycle staff, and policy analysts seeking a clear, nationwide overview of CPT code 49320 and its operational context.
Billing Code Overview
CPT code 49320 describes a diagnostic laparoscopy of the abdomen. In this procedure a provider uses a laparoscope — a tubular instrument with a light source and camera — to inspect the peritoneum and the omentum for causes of abdominal symptoms such as pain, swelling, or organ enlargement. The provider may perform brushing and irrigation (washings) to obtain cells for cytologic analysis.
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Service type: Diagnostic laparoscopic inspection with peritoneal and omental evaluation
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Typical site of service: Ambulatory surgical center or hospital operating room, performed under appropriate anesthesia
Clinical & Coding Specifications
Clinical Context
A 46-year-old female presents with several weeks of progressive lower abdominal pain, bloating, and unexplained weight loss. Imaging (abdominal ultrasound and CT) demonstrates small-volume peritoneal nodularity and equivocal omental thickening. Laboratory studies show mildly elevated CA-125. The surgical team schedules a diagnostic laparoscopy to visualize the peritoneal cavity, inspect the omentum, obtain peritoneal washings and brushings for cytology, and perform targeted biopsies of suspicious lesions.
The clinical workflow includes preoperative evaluation (history, focused exam, consent, anesthesia assessment), operating room preparation with laparoscopic tower and sterile instruments, abdominal entry with trocar placement, systematic inspection of the peritoneum and omentum using a laparoscope, collection of peritoneal washings and brushings, directed biopsies or omental biopsy if indicated, hemostasis, and closure of trocar sites. Specimens are labeled and sent to pathology and cytology. Postoperative recovery includes monitoring in PACU, pain control, discharge instructions, and follow-up for pathology results.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work or time is substantially greater than typical for diagnostic laparoscopy due to extensive adhesiolysis or complex biopsies. |