Regarding OMT and billing,
In Rehab Medicine (PT, OT, DO, MD, And some DC) most procedures regarding mobilizations, PROM and/or AAROM are billed as such (therapeutic ex, ROM ex, neuromuscular re-education etc.) but have certain guidelines under each code. Some state a certain amount of time must be spent, other state that it may be specifically used to alter mearsureable increases in ROM or are used to increase balance, timing, and or functional patterns for ADL's etc.
There are of course codes for billing of massage and manual techniques...but simply do not reimburse as well.
There are also codes for ADVANCED ROM ex...ones that the clinician must be present for at all times and require specific skill etc.
Now, osteopathic physicians have worked long and hard to have billing categories specifically for them under the heading of "Osteopathic Manipulative Therapy". These billing codes are more specific for area than they are technique, therefore are harder to quantify when insurance companies find issues with length of treatment, outcome studies, etc. SOOOOOO, when the outcome studies favor particular billing codes over others, those billing codes are MORE likely to be reimbursed for a higher value for a longer period of time (LBP: Therapeutic ex may have 40 billable units allowable, 4 Ultrasound units, 4 massage units, 0 ice or heat units)
So, lacking goniometric measurement of joint movement or progress, or the lack of rigorous outcome studies have somewhat hurt reimbursement of OMT billing.
So, to bypass the issue, most practicioners decide to accept cash only. Creating a non-used billing code or a code used by only a small, small percentage of clinicians per DRG.
It is something found throughout rehab.
hope this helps.