Subcoracoid impingement occurs when the subscapularis tendon becomes impinged between the coracoid process and the lesser tuberosity. It can be caused by anatomical variants that reduce the coracoglenoid space. Patients experience anterior shoulder pain that is diagnosed using tests like the lift-off and Napoleon tests as well as MRI. Treatment options include rest, anti-inflammatories, rehabilitation, arthroscopic coracoplasty through the rotator interval or open surgery to widen the space.