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.
Cervical Nerve Functions. Branching off from the nerves in the spinal cord, the cervical nerves are responsible for relaying messages and ensuring functioning to different body parts.1  See Spinal Cord and Spinal Nerve Roots. 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).