Which of the following is NOT considered an adjustment?

The AP axial shoulder projection (Stryker method)

1. is performed to demonstrate the Hill-Sachs defect. 2. is obtained with the affected humerus vertical and the palm of the hand placed on top of the head. 3. uses a 10-degree caudal central ray angle. 4. is obtained with the patient in a supine position. a. 3 and 4 only b. 2, 3, and 4 only c. 1, 2, and 4 only d. 1, 2, 3, and 4

Any combination of values not contained in a single row of the ICD-10-PCS tables is __________

a. constant b. hierarchical c. invalid d. reported