- An enlistment can be rejected if the patient has an authenticated history of chronic or severe conditions related to the heart, lungs, esophagus, stomach, duodenum, small and large intestines, spleen, abdominal wall, and other sections of the organs and gastrointestinal system. Disqualifying conditions include but are not limited to abnormal elevation of the diaphragm, current abscess of the lung, chronic or recurrent esophagitis, chronic hypertrophic gastritis, inflammatory bowel disease, gastrointestinal bleeding, abdominal surgery that took place in the previous 60 days (unless it was post-laparoscopic cholecystectomy, which may be cleared after 30 days), and stomach stapling or gastrointestinal bypass surgery for obese persons. Conditions that impair the urinary system, including cystitis, urethritis, enuresis, are disqualifying. Conditions related to the genitalia, and also removal of genitals, are disqualifying. Enlistees can be disqualified if deficient muscle development interferes with their ability to complete training.
- Enlistees can be disqualified if they have a history of chronic or severe diseases or conditions that have a negative impact on their ability to see, hear, or chew, according to the Standards of Medical Fitness. Deformities of the skull, face or mouth that prevent them from wearing military headgear or protective masks are disqualifying. Allergic rhinitis, other nose conditions, cleft lip and leukoplakia are disqualifying. Neurological disorders like intracerebral hemorrhage, as well as severe or chronic conditions related to the neck, are also disqualifying.
- Authenticated conditions of uncorrected anemia, hemorrhagic disorders, leukopenia, and immunodeficiency are blood-related or blood-forming tissue diseases can disqualify an enlistee. Endocrine and metabolic disorders such as diabetes mellitus are disqualifying. Abnormalities of the arteries and blood vessels, hypertensive vascular disease, pulmonary or systemic embolizations, peripheral vascular disease, and venomous diseases are also disqualifying.
Extremities and skin
- Enlistees can be disqualified if they have excessively limited motion in the joints of the upper and lower body, including but not limited to the spine, arms, hands, fingers, hips, feet and ankles. It's also disqualifying if enlistees have severe or chronic medical conditions related to those areas. Enlistees can also be disqualified if they have diseases or chronic or severe conditions related to the skin and cellular tissues, including but not limited to eczema, pilondial cysts, or keloid formation.
- Learning, psychiatric, and behavioral disorders are disqualifying. Attention Deficit Disorder (ADD) and Attention Deficit Hyperactivity Disorder (ADHD) are disqualifying, unless the enlistee can demonstrate appropriate academic performance and has not used medications in the previous 12 months.
- The presence of malignant tumors or the history of malignant tumors are disqualifying. Current benign tumors that prevent the proper wearing of military uniforms or protective equipment are disqualifying.