Code 92929 is an add-on code so no modifier is needed for the second procedure. Note that the codes indicate that they are for an artery or branch. A second code is not reported for multiple sites of the same artery or branch.
1 C1 and C2 (the first two cervical nerves) control the head. 2  C3 and C4 help control the diaphragm (the sheet of muscle that stretches to the bottom of the rib cage and plays an important role in breathing and respiration).atch Cervical Radiculopathy Video. In addition to the seven cervical vertebrae, cervical anatomy features eight cervical nerves (C1-C8) that branch off of the spinal cord and control different types of bodily and sensory activities. Each cervical nerve is named based on the lower cervical vertebra that it runs between.
Nerve C6 controls movement in the wrists and C7 controls the triceps. Cervical nerve C8 works to control the hands. These functions are assisted through the branching of nerves from the brachial plexus to the regions they control.hese nerves in the neck form the phrenic nerve, which helps control the diaphragm and regulate breathing. Injury to the phrenic nerve can result in problems breathing and even death. Ad. Together, nerves C1-C4 work to complete the functions of the cervical plexus.