A patch to stop the reimbursement cuts to doctors who treat Medicare patients included in the "fiscal cliff" deal doesn't address patient disengagement from the health care process, Athenahealth CEO Jonathan Bush told CNBC's "Squawk on the Street" on Wednesday.

The so-called "doc fix" included in the bill to avert automatic tax hikes and spending cuts blocks a scheduled 27 percent cut in reimbursements for doctors for one year, with other health care providers having to pay for the fix.