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.
Sensory nerves deliver information about your surroundings to the brain. Motor nerves deliver signals from the brain to activate your muscles. Injuries or diseases that affect nerves and muscles can slow or halt the movement of these electrical signals. If you have pain, weakness or numbness in your back, neck or hands, measuring the speed and degree of electrical activity in your muscles and nerves can help your doctor make a proper diagnosis. This process is called electrodiagnostic testing.