I have not billed that before but most of what I read is that it is not recognized by most insurance carriers. The following CPT codes appear to be related to colon hydrotherapy:
74283 - therapeutic enema
97139c - unlisted therapeutic procedure (removal of impaction)
45915 - removal of fecal impaction of foreign body
45999 - unlisted procedure, rectum or anus
91123 - pulsated irrigation of fecal impaction
5609 - obstructing intestines