Eosinophilic esophagitis, commonly abbreviated EoE, is a chronic immune-mediated disorder in which eosinophils accumulate in the lining of the esophagus. For pilots, an EoE diagnosis does not automatically prevent FAA medical certification. The FAA provides a Conditions AMEs Can Issue (CACI) pathway that allows an Aviation Medical Examiner (AME) to issue a medical certificate when the disease is appropriately treated, objectively controlled, and supported by the required documentation [1], [2].

The practical challenge is preparation. A pilot who arrives without a current progress note, qualifying endoscopy and pathology results, or a clear medication history may face an avoidable deferral.

Typical Symptoms of Eosinophilic Esophagitis

In adults, EoE most often presents with difficulty swallowing solid food, medically termed dysphagia. Patients may describe meat, bread, rice, or other dense foods moving slowly, sticking behind the breastbone, or requiring unusually large amounts of liquid to swallow. Food impaction—food becoming lodged in the esophagus—is particularly important because it may require urgent endoscopic removal.

Other symptoms can include heartburn, chest discomfort, regurgitation, painful swallowing, nausea, and upper abdominal discomfort. Some patients unconsciously adapt by eating slowly, cutting food into very small pieces, chewing excessively, avoiding certain textures, or drinking after every bite. These compensatory behaviors can make the disease appear less symptomatic than it is [3], [4].

Diagnosis generally requires symptoms of esophageal dysfunction, an upper endoscopy with biopsies demonstrating at least 15 eosinophils per high-power field, and an evaluation for other causes of esophageal eosinophilia. Symptoms alone are not a reliable measure of control because inflammation and narrowing can persist even when the patient feels better [3]. 

Why EoE Matters in Aviation

The primary aviation safety concern of EoE is sudden or distracting esophageal obstruction. A food impaction in flight could cause severe chest discomfort, inability to swallow secretions, vomiting, distraction, or the need for urgent medical treatment. Even without complete obstruction, recurrent dysphagia or chest pain could interfere with cockpit performance or be mistaken for a cardiac event.

Longstanding inflammation can also produce scarring or fibrosis that increase the likelihood of recurrent food impaction. Esophageal rings, strictures, and a narrow-caliber esophagus are examples. Medication side effects must also be considered.

For these reasons, the FAA evaluates more than symptom improvement. The CACI standard addresses treatment compliance, medication tolerance, remission based on laboratory analysis, prior food impaction, and the absence of structural narrowing [1]. 

Pilots should also consider the timing of meals before flight, known trigger foods, and whether symptoms are more likely when eating hurriedly. A condition that is manageable on the ground may become more consequential in a single-pilot cockpit or during a critical phase of flight.

More Serious Conditions Can Mimic EoE

Difficulty swallowing and food sticking should not automatically be attributed to EoE. Gastroesophageal reflux disease and peptic strictures can cause similar symptoms. Achalasia and other motility disorders may interfere with movement of food through the esophagus. Pill-induced or infectious esophagitis can cause pain and inflammation, while esophageal rings or webs may create mechanical obstruction.

Most importantly, progressive dysphagia—particularly when accompanied by unintentional weight loss, anemia, gastrointestinal bleeding, persistent vomiting, or steadily worsening symptoms—can indicate esophageal or upper gastric cancer. These warning signs warrant prompt medical investigation.

The American College of Gastroenterology’s current diagnostic guideline requires the evaluation of non-EoE disorders before confirming eosinophilic esophagitis [3]. This distinction matters aeromedically because certification depends on the actual diagnosis, its stability, and its potential to cause incapacitation.

FAA CACI Criteria for Eosinophilic Esophagitis

Under the FAA worksheet updated April 29, 2026, the EoE CACI pathway applies to all classes of FAA medical certification. The AME must review a detailed clinical progress note based on a visit with the treating physician or specialist no more than 90 days before the AME examination [1].

To qualify, every applicable criterion must be met:

• The treating clinician must document that the pilot is compliant with treatment, the condition is well controlled, and there are no medication side effects.
• The most recent endoscopy with biopsy must have been completed within the surveillance interval recommended by the treating physician.
• The biopsy must demonstrate histologic remission, defined by the FAA as fewer than 15 eosinophils per high-power field.
• The examination must show no fibrostenotic disease, specifically no esophageal rings, strictures, or narrow-caliber esophagus.
• The pilot must have no food impaction during the preceding 12 months or while receiving treatment [1].

Acceptable treatment may include a proton pump inhibitor; topical or oral steroids that do not exceed the equivalent of 20 mg of prednisone daily; or dupilumab. Pilots using dupilumab must observe a four-hour post-dose no-fly period [1].

When every criterion is satisfied and the applicant is otherwise qualified, the AME may issue without a special time limitation and enter the appropriate CACI statement in Block 60 of your application. First- and second-class applicants must provide the required information annually. Third-class applicants provide it with each required examination [1], [2].

A pilot who remains symptomatic, is inadequately treated, has fibrostenotic disease, or experienced food impaction during the past year does not qualify for CACI issuance. The AME must defer the application for possible Special Issuance review. The FAA will expect a current progress note, recent endoscopy and pathology reports, relevant tests, and documentation of any food impaction or endoscopic dilation [2].

What to Do Before Submitting Your FAA Medical Application

Preparation should begin before clicking Submit in FAA MedXPress. Even if you meet the CACI criteria for your AME to issue a certificate, if you fail to provide the appropriate documentation, your AME may be forced to defer your exam to the FAA. Once your AME submits, you will need to provide the needed information to the FAA and then wait for them to review your application and provide your certificate via mail [5], [6]. 

Many AMEs offer consultation appointments to discuss FAA medical certification issues without conducting an exam. At Wingman Med, we offer free phone consultations to pilots with significant medical concerns. Whatever option you choose, a pre-application review can determine whether the available records support CACI issuance or whether additional treatment, testing, or documentation will be needed.

Once you understand the requirements, you will need a Current Detailed Clinical Progress Note from your treating physician from no more than 90 days before your FAA certification examination. Your doctor must address address:

• Current symptoms and clinical control
• Treatment adherence
• Medications, doses, and side effects
• Examination and testing results
• Prognosis and follow-up plan
• History of food impaction
• Any history of endoscopic dilation

You should also review the results from your latest endoscopy and pathology reports carefully.. If you have more than 15 eosinophils per high-power microscope field or your endoscopy addresses rings, strictures, and esophageal caliber, it may be better to delay your AME appointment until your condition is under better control.

Finally, make sure that you are otherwise qualified to hold a medical certificate and your other medical care is documented properly. Small administrative errors often delay medical certification by weeks or months. Only submit your MedXPress application and schedule your AME exam when you’re sure what the outcome will be.

A Documentation-First Path to Certification

Eosinophilic esophagitis is often compatible with unrestricted FAA medical certification when it is accurately diagnosed, effectively treated, and objectively in remission. The CACI pathway gives appropriately controlled pilots an opportunity for issuance by their AME without waiting for routine FAA review.

The key is to treat the medical examination as a documentation process—not merely a physical examination. Preparing the current progress note note, endoscopy report, pathology results, and medication information before submitting MedXPress can help prevent an otherwise qualified pilot from being deferred because a required record was missing, outdated, or incomplete.

References

[1] Federal Aviation Administration, “CACI—Eosinophilic Esophagitis,” Guide for Aviation Medical Examiners, Apr. 29, 2026.

[2] Federal Aviation Administration, “Eosinophilic Esophagitis Disposition Table—All Classes,” Guide for Aviation Medical Examiners, Apr. 29, 2026.

[3] E. S. Dellon, A. B. Muir, D. A. Katzka, et al., “ACG clinical guideline: Diagnosis and management of eosinophilic esophagitis,” American Journal of Gastroenterology, vol. 120, no. 1, pp. 31–59, 2025.

[4] Mayo Clinic, “Eosinophilic esophagitis—Symptoms and causes,” Mayo Foundation for Medical Education and Research, 2026.

[5] Federal Aviation Administration, “How do I get a medical certificate and what to expect during the AME examination,” 2026.

[6] Federal Aviation Administration, “FAA MedXPress Program for Pilots—Your Express Lane to Medical Certification,” 2026.