In my previous position, I worked for a FP clinic who had their own physician based laboratory, we did pre-operative lab tests all the time. As along as we followed the diagnosis requirement guidelines from CMS, we really didn't have a problem getting them paid.
"ICD Coding Requirements for Preoperative Services.--All claims for preoperative medical examination and preoperative diagnostic tests (i.e., preoperative medical evaluations) must beaccompanied by the appropriate ICD-9 code for preoperative examination (e.g., V72.81 throughV72.84). Additional appropriate ICD-9 codes for the condition(s) that prompted surgery and for conditions that prompted the preoperative medical evaluation (if any), should also be documented on the claim. Other diagnoses and conditions affecting the patient may also be documented on the claim, if appropriate. The ICD-9 code that appears in the line item of a preoperative examination or diagnostic test must be the code for the appropriate preoperative examination (e.g., V72.81through V72.84)."
