Appendectomy

An appendectomy is the surgical removal of the appendix, a small, finger-shaped pouch attached to the beginning of the large intestine. It is the definitive treatment for acute appendicitis, because removing the whole appendix eliminates the source of infection and prevents the problem from coming back (Moris et al., JAMA, 2021). Appendicitis is one of the most common surgical emergencies in the world. It has a lifetime incidence of about 7% to 8% and peaks between ages 20 and 40 (Charles, JAMA, 2026).

Today the laparoscopic appendectomy is the gold standard (Salminen et al., Nature Reviews Disease Primers, 2025). The World Society of Emergency Surgery recommends the laparoscopic approach over open surgery for both uncomplicated and complicated appendicitis (Sermonesi et al., WSES Cesena Guidelines, 2023). The Society of American Gastrointestinal and Endoscopic Surgeons recommends it as the treatment of choice for adults with uncomplicated appendicitis and for suspected appendicitis during pregnancy (Moris et al., JAMA, 2021).

Modern appendicitis care is not one-size-fits-all. Some patients are candidates for antibiotics alone. Some with an abscess do best with drainage first and interval appendectomy later. Older adults with complicated appendicitis need careful evaluation for a hidden appendiceal tumor. The right plan depends on your imaging, age, and severity of disease.

Appendicitis usually starts when the opening of the appendix is blocked, often by a hardened piece of stool called an appendicolith, by swollen lymph tissue, or rarely by a tumor. Bacteria multiply, the appendix swells, and if untreated it can become gangrenous or rupture, spreading infection into the abdomen.

An appendectomy works by removing the infected organ entirely. The surgeon:

• Divides the blood supply to the appendix (the mesoappendix)
• Staples or ties off the appendix at its base, leaving a stump of no more than about 0.5 cm to prevent stump appendicitis (Gorter et al., EAES Consensus, Surgical Endoscopy, 2016)
• Removes the appendix in a protective bag through one of the small incisions
• Cleans any infected fluid from the abdomen when the appendix has ruptured

The appendix is always sent for pathology. Most specimens show ordinary inflammation, but this step occasionally finds an unsuspected appendiceal tumor.

• Permanent cure: Removing the appendix eliminates the risk of recurrent appendicitis (Salminen et al., Nature Reviews Disease Primers, 2025).
• Fewer complications with laparoscopy: Overall complication rates are about 5.3% laparoscopic vs 10.8% open for uncomplicated appendicitis, and 20.4% vs 27.7% for complicated appendicitis (Salminen et al., 2025).
• Fewer wound infections: Surgical site infection rates are 0.1% to 4.8% laparoscopic vs 0.4% to 12.1% open (Salminen et al., 2025).
• Faster recovery: In one comparison, laparoscopy meant shorter hospital stays (2.6 vs 3.4 days) and an earlier return to normal activity (14 vs 21 days) (Moris et al., JAMA, 2021).
• Better outcomes in ruptured appendicitis: In more than 40,000 adults, laparoscopic appendectomy for complicated appendicitis had lower morbidity (17.4% vs 26.7%) and hospital stays about 3 days shorter than open surgery (Tiwari et al., Annals of Surgery, 2011).
• Diagnostic certainty: Laparoscopy lets the surgeon see the entire abdomen, which helps confirm or rule out appendicitis when symptoms are unclear (Moris et al., 2021).
• Fewer bowel obstructions later: Laparoscopy is associated with lower rates of adhesive bowel obstruction than open surgery (Salminen et al., 2025).

Appendectomy is appropriate for almost all patients with appendicitis (Salminen et al., Nature Reviews Disease Primers, 2025), including:

• Acute uncomplicated appendicitis, especially when an appendicolith is present on CT
• Perforated (ruptured) appendicitis or generalized peritonitis, which require emergency surgery
• Patients who prefer a permanent solution over antibiotics alone
• Recurrent appendicitis after earlier treatment with antibiotics
• Adults 35 or older recovering from an appendiceal abscess treated without surgery, who need an interval appendectomy (Podda et al., WSES Jerusalem Guidelines, JAMA Surgery, 2026)
• Appendiceal masses, polyps, or mucoceles found on imaging or colonoscopy
• Pregnant patients with suspected appendicitis (Moris et al., JAMA, 2021)

When antibiotics alone may be an option: Selected adults with CT-confirmed uncomplicated appendicitis and no appendicolith may be candidates for antibiotics-first treatment. In the CODA trial, antibiotics were noninferior to surgery for 30-day health status. However, 29% needed an appendectomy within 90 days: 41% of patients with an appendicolith vs 25% without one. Complication rates were higher with antibiotics, and the difference came entirely from patients with an appendicolith (CODA Collaborative, New England Journal of Medicine, 2020).

Appendectomy is performed under general anesthesia. All patients receive a single dose of intravenous antibiotics before the incision to lower the risk of wound infection (Moris et al., JAMA, 2021).

In a laparoscopic appendectomy, the surgeon makes three small incisions, usually 5 to 12 millimeters, and fills the abdomen with carbon dioxide to create working space. A camera shows the appendix on a high-definition monitor. The mesoappendix is divided with an energy device, the base of the appendix is stapled, and the appendix is removed in a retrieval bag. If the appendix has ruptured, infected fluid is suctioned out. Most cases take under an hour.

A robotic appendectomy follows the same steps using wristed robotic instruments and 3D magnification. It can help in patients with dense scar tissue, a gangrenous base, or prior abdominal surgery. In a 2026 multi-hospital study of 1,431 patients, robotic appendectomy had fewer conversions to open surgery and fewer unexpected extended bowel resections than laparoscopy (Thomas et al., Surgical Endoscopy, 2026). Other studies have found no difference, and robotic surgery costs more, so it is used selectively.

Open appendectomy through a small right lower abdominal incision is now reserved mainly for situations where laparoscopy is not safe or not available.

Drains are generally not used. Current guidelines found that abdominal drains increase complications and wound infections without preventing abscesses (Podda et al., WSES Jerusalem Guidelines, JAMA Surgery, 2026).

Appendectomy is very safe, but every operation carries risks:

• Surgical site infection: 1.2% to 12% across studies, much lower with laparoscopy (Gorter et al., Surgical Endoscopy, 2016)
• Intra-abdominal abscess: about 1% after non-perforated appendicitis vs 5% to 10% after perforated appendicitis (Mao et al., Langenbeck's Archives of Surgery, 2024). Most abscesses respond to antibiotics, with or without image-guided drainage.
• Small bowel obstruction from adhesions: 0% to 1.9% in the short term (Gorter et al., 2016), and about 2.8% over the long term (Salminen et al., 2025)
• Bleeding, stump leak, and stump appendicitis: rare, and minimized by removing the appendix completely at its base
• Conversion to open surgery: more likely with rupture, abscess, or dense adhesions
• Mortality: less than 1%, even for complicated appendicitis (Tang et al., Cochrane Database of Systematic Reviews, 2025)

Recovery after laparoscopic appendectomy is fast. Most patients in the United States go home the day after surgery, and many with uncomplicated appendicitis go home the same day (Talan and Di Saverio, New England Journal of Medicine, 2021). Patients usually return to normal activities within 1 to 2 weeks, about 5 days sooner after laparoscopy than after open surgery (Talan and Di Saverio, 2021).

Uncomplicated appendicitis does not need antibiotics after surgery (Moris et al., JAMA, 2021). For ruptured or complicated appendicitis, a short course of 2 to 3 days after adequate source control is now preferred over 5 to 7 days (Podda et al., WSES Jerusalem Guidelines, JAMA Surgery, 2026). A randomized trial found 2 days as effective as 5 days after laparoscopic appendectomy, with fewer antibiotic side effects (de Wijkerslooth et al., The Lancet, 2023).

Removing the appendix has no known harmful effect on digestion or long-term health for the vast majority of people, and appendicitis cannot recur once the appendix is fully removed. The main long-term considerations are a small lifetime risk of adhesive bowel obstruction, which is lower after laparoscopy (Salminen et al., Nature Reviews Disease Primers, 2025), and the rare need for follow-up when pathology reveals an appendiceal tumor. Every patient should review the final pathology report at the postoperative visit.

More in General and Minimally Invasive Surgery

Related procedures: Splenectomy, Diagnostic Laparoscopy, Superior Mesenteric Artery Syndrome Surgery, Median Arcuate Ligament Release, Major Surgical Oncology and Complex Benign Tumor Surgery, Robotic Surgery. For an overview of all options, see Minimally Invasive Surgery.

Conditions treated: Appendicitis.

An appendectomy is a common operation, but the cases that matter most are the ones that aren't routine: the ruptured appendix, the abscess, the patient with prior abdominal surgery, the older adult whose "appendicitis" may hide a tumor. Dr. Nestor de la Cruz-Muñoz, MD, FACS, DABOM, brings advanced minimally invasive and reoperative surgical expertise to every case.

• Teaching surgeon: He served as a bariatric surgery fellowship program director for ten years, training other surgeons in advanced laparoscopic and robotic techniques.
• Laparoscopic and robotic expertise: He chooses the approach based on your anatomy and severity of disease, with the skill to complete complex cases minimally invasively.
• Reoperative abdomen experience: His practice in revisional bariatric and foregut surgery means extensive experience operating through scar tissue and altered anatomy, including appendicitis in patients who have had gastric bypass, sleeve gastrectomy, or other abdominal operations.
• Evidence-based decision-making: Each case is judged on its evidence: surgery vs antibiotics, early surgery vs interval appendectomy, and when to evaluate for an appendiceal tumor.
• Complete follow-through: Includes pathology review and coordination of colonoscopy or oncology care when needed.

Even a routine appendectomy benefits from an experienced hand. Dr. de la Cruz-Muñoz has performed over 15,000 minimally invasive procedures in over 25 years of practice, including complex foregut, hernia, gallbladder and abdominal operations as well as bariatric surgery.

Not applicable. Appendectomy does not affect reflux. Patients with reflux symptoms can learn about evaluation and treatment on our GERD / Acid Reflux and anti-reflux surgery pages.

Repeat surgery after appendectomy is uncommon. When it is needed, it is usually for:

• Intra-abdominal abscess, most often treated with antibiotics or image-guided drainage, with laparoscopic drainage if those fail (Gorter et al., EAES Consensus, Surgical Endoscopy, 2016)
• Stump appendicitis, inflammation of a retained appendiceal stump, treated by laparoscopic or open stump resection (Gorter et al., 2016)
• Appendiceal tumor on pathology, which may require a right colectomy or other oncologic surgery depending on tumor type and size
• Adhesive small bowel obstruction, sometimes treated with laparoscopic lysis of adhesions

Appendectomy for appendicitis is a medically necessary emergency procedure and is covered by virtually all insurance plans, including Medicare and Medicaid. No prior authorization is required for emergency surgery. Elective or interval appendectomy (for example, after an abscess or for an appendiceal mass) may require prior authorization, and documentation of imaging findings, age-related tumor risk, or recurrent symptoms supports approval.

Most appendectomies are urgent, so preparation happens quickly in the hospital:

• Imaging, usually CT, or ultrasound or MRI in pregnancy and children
• Blood tests, including blood count and pregnancy testing when applicable
• Nothing to eat or drink before surgery
• IV fluids and a pre-incision dose of antibiotics, with antibiotics started earlier if surgery is delayed (Moris et al., JAMA, 2021)
• Medication review, especially blood thinners and GLP-1 medications, which slow stomach emptying and matter for anesthesia safety

For interval appendectomy in adults 35 or older, guidelines recommend a repeat CT and a colonoscopy before surgery to rule out tumors of the appendix and right colon (Podda et al., WSES Jerusalem Guidelines, JAMA Surgery, 2026).

Most patients start clear liquids within hours of surgery and advance to a regular diet as tolerated, often by the next morning. After ruptured appendicitis, bowel function may return more slowly, and the diet is advanced as nausea and bloating resolve. Early on, small, light meals, good hydration, and a stool softener while taking pain medication help prevent constipation. No long-term dietary restrictions are needed.

Walking begins the day of surgery. After laparoscopic appendectomy, patients typically avoid strenuous activity for 3 to 5 days. After open surgery, that period is 10 to 14 days (Talan and Di Saverio, New England Journal of Medicine, 2021). Return to work or school when you feel well enough, usually within 1 to 2 weeks. Heavy lifting and core-intensive exercise are resumed gradually as comfort allows. Avoid soaking incisions in baths or pools until they are fully healed.

Appendicitis is treated urgently, so visitors who become ill in Miami are cared for at HCA Florida Mercy Hospital. Most patients can travel again within a few days to a week after laparoscopic appendectomy. We provide records and pathology results for your doctor at home.