Most insurance companies do not pay for sclerotherapy or any other treatment if it is performed for cosmetic reasons.
Some insurance companies do pay benefits if there is pain or discomfort which impedes activity.
However, each insurance carrier is different and it is recommended that individuals check with their own agents to determine if there is coverage. In other words, it allows you to select any physician or hospital your heart desires. The other good thing about it is that it allows you to self-refer. Similar to a PPO except that the coverage for non-listed physicians and services may be less, and there are more rigorous utilization review requirements. Your selection of doctors and hospitals is strictly limited to those on the HMO list.