This depends totally on what you mean by "pre-operative visits". Are you talking about a visit to the surgeon (or the surgeon's NPP) or to a provider not involved with the surgery? If the decision is made to do surgery during this visit, then you would code for the appropriate E&M and, if the surgery occurs on the same day or the following day, append modifier -57 to the E&M. However, if the patient is coming in for a "history and physical" and to obtain consents and answer questions the patient may have - this encounter is not billable, as it is included in the reimbursement for the surgery. In the RVUs for all surgeries with a 90-day global period, there is the work included for this encounter. Technically, if this encounter happens 2 or more days before the surgery, you could bill it, but ethically you probably should not.
There is no CPT code for a non-billable H&P encounter. Some of my providers choose to use 99024 to track the frequency and the associated ICD-10CM codes for these non-billable services. Others use a code they have created, such as Preop as a place holder for these encounters, when their EMR allows for this. A few just don't enter them into the practice management system at all.
A surgical clearance encounter would not be done by the surgeon. A surgical clearance is where a specialist (usually) clears the patient for surgery. For instance, if a patient with CHF is scheduled for a breast biopsy for a suspicious mass under general anesthesia, the surgeon and anesthesiologist may request clearance from the patient's cardiologist. The cardiologist is not doing the surgery, therefore, the cardiologist will not be paid for any services included in the global package. So, the cardiologist should code the pre-operative clearance encounter with the appropriate E&M code and follow the ICD-10-CM guidelines for the encounter. These guidelines are in Section IV item M "Patients receiving preoperative evaluations only. For patients receiving preoperative evaluations only, sequence first a code from subcategory Z01.81, Encounter for pre-procedural examinations, to describe the pre-op consultations. Assign a code for the condition to describe the reason for the surgery as an additional code. Code also any findings related to the pre-op evaluation" So in the hypothetical case I mentioned the ICD10-CM codes would be Z01.810, N63, I50.9
Hope this helps,
Karen Hill, CPC, CPB, CPMA, CPC-I
AHIMA Approved ICD-10-CM Trainer