Determine 'planned or unplanned' before separately coding vitrectomy. Use these tricky scenarios as a guide through some of the most problematic cataract coding situations: Document Necessity for Planned Vitrectomy Scenario #1: Problem: Solution: The National Correct Coding Initiative bundles vitrectomy codes 67005 (Removal of vitreous, anterior approach [open sky technique or limbal incision]; partial removal) and 67010 (... subtotal removal with mechanical vitrectomy) into cataract surgery codes 66982 (Extracapsular cataract removal with insertion of intraocular lens prosthesis [one stage procedure], manual or mechanical technique, complex ...) and 66984 (Extracapsular cataract removal with insertion of intraocular lens prosthesis [one stage procedure], manual or mechanical technique [e.g., irrigation and aspiration or phacoemulsification]), says Riva Lee Asbell, ophthalmic coding and reimbursement educator and principal of Riva Lee Asbell Associates in Ft. Lauderdale, Fla., who led the "Avoid the Modifier Haze" seminar at The Coding Institute's July conference. Rationale: Exception: Key: Be prepared to provide documentation in case you receive denials when using the cataract and vitrectomy codes together, despite using modifier 59. Payers are aware of the potential for abuse of 59 and may want you to go through the review process to prove you've met the definition of "distinct procedural service." Provide the chart notes to show that you knew about the vitreous collapse in advance and that you made plans to repair it prior to the surgical session of another service. Also, you should provide the operative report with clear documentation showing that there was another condition, besides the cataract surgery, that made the vitrectomy medically necessary. Append 79 for Surgery in Fellow Eye Scenario #2: Problem: Solution: The best option here would be modifier 79 (Unrelated procedure or service by the same physician during the postoperative period). Remember also to append the "side" modifiers, LT (Left side) or RT (Right side), to demonstrate that the ophthalmologist performed the procedures on opposite eyes. Report 66984-79-LT for the second cataract surgery. Report Related Procedures With 78 Scenario #3: On Nov. 10, the patient in Scenario #2 presents with after-cataracts in his left eye. The ophthalmologist incises the posterior capsule with a YAG laser. Problem: Solution: When the ophthalmologist performed 66984 on the left eye on Sept. 1, a new 90-day global period started, which would end at the end of November. Code 66821- LT-78 (Discission of secondary membranous cataract [opacified posterior lens capsule and/or anterior hyaloid]; laser surgery [e.g., YAG laser] [one or more stages]; left side; return to the operating room for a related procedure during the postoperative period). If the patient also had after-cataracts in his right eye, you would code 66821-RT-79. That procedure, although occurring within the global period of 66984-LT, is unrelated to it, warranting the use of modifier 79. The global period for the related procedure, 66984-RT, would already have expired.