Definition of ablative. 1  1 : of or relating to ablation. 2  2 : tending to ablate ablative material on a nose cone.
Occipital Nerve Block. An occipital nerve block is an injection that numbs the nerves at the back of the head. There are four nerves on each side of the scalp. Occipital nerves allow us to feel sensations in the scalp. An occipital nerve block is done to decrease headache pain, caused by migraine, injury (concussion), muscle tightness or occipital neuralgia. The medicine used is either a local anesthetic or a combination of a local anesthetic and a steroid. The medicine is placed around the occipital nerves, which are located just beneath the skin, in the back of the head. The occipital block is usually done in the office.
The 'third occipital nerve' is not anatomically synonymous with the greater occipital nerve,. Physicians use both injections to diagnose and/or treat some forms of headache. But coding depends more on the anatomical structure and the procedure location than the patient's symptoms or diagnosis..