Focus on the surgeon's documentation, not the appointment book. If you want to ensure you get paid for services your orthopedic surgeon performs after a major procedure while you're still billing in the global period of the procedure, you need to know the ins and outs of modifier 24 (Unrelated evaluation and management service by the same physician during a postoperative period:...). Even seasoned billers struggle with this modifier at times. Overcome modifier 24 claim challenges by busting five myths that will lead to denial after denial if you fall into their billing trap. In part one of this two-part series, we'll bust the first two myths about when you should use modifier 24. Myth #1: Modifier 24 Applies To Any Service Done In the Post-Op Period You should only append modifier 24 to an appropriate E/M code when an E/M service occurs during a postoperative global period for reasons unrelated to the original procedure. Modifier 24 tells the payer that the surgeon is seeing the patient for a problem unrelated to surgery. Therefore, the plan should not include the E/M service in the previous procedure's global surgical package. Modifier 24 is "only for use on E/M codes, and only for use during the post-operative period (10 days or 90 days)," says Joseph Lamm, office manager with Stark County Surgeons, Inc. in Massillon, Ohio. "The very definition of the modifier states it plainly: 'unrelated evaluation and management service,'" points out Charlotte T. Tweed, RHIA, CPC, coding auditor and inpatient/surgery coder in the department of medical education/coding at Florida Hospital in Orlando. Rule: Additionally: Myth #2: Scheduled Office Visit Rules Out Modifier 24 Just because a patient was scheduled to come into your office for a follow-up visit related to the surgery, you shouldn't automatically assume you're unable to bill separate services using modifier 24. Example: In this case, you "should be able to use modifier 24 to describe an E/M service unrelated to the surgery (only related to the disease process)," says Marcella Bucknam, CPC, CCS-P, CPC-H, CCS, CPC-P, COBGC, CCC, manager of compliance education for the University of Washington Physicians Compliance Program in Seattle. "CPT® would always allow this but even Medicare states that care directed at the underlying disease process is separately billable in the global period. Key: Stay tuned: