Cataract surgery carries a 90-day global period: a single payment intended to cover the procedure and its routine aftercare. Ophthalmology practices lose money on the global period in both directions — writing off visits that were legitimately billable, and billing visits that were bundled, then absorbing the denials and audit exposure. The fix is understanding exactly where the boundaries sit.
What the global package includes
Inside the 90 days, the surgical payment covers routine post-operative visits related to recovery: the day-one check, week-one visit, and the standard interval exams that confirm normal healing. It also includes typical post-op medication management for the operative eye and the treatment of expected recovery-course findings. If the visit's purpose is 'is this eye healing as expected,' it's bundled — no matter how many such visits you perform.
What falls outside the package
- Unrelated conditions — new or progressing problems not connected to the surgery: a fellow-eye issue, glaucoma progression, new retinal pathology. These bill with modifier 24 and the unrelated diagnosis code. We cover the documentation standard in our modifier 25 and 24 guide.
- Complications requiring a return to the OR — billed with modifier 78, which pays the intraoperative portion.
- Staged or related procedures — a planned second-eye surgery during the first eye's global period bills with modifier 79 (unrelated procedure, different eye) and starts its own global period.
- The refraction and eyewear — refractions were never part of the surgical package; they're simply non-covered by Medicare.
Comanagement: modifiers 54 and 55
When a comanaging optometry practice assumes post-op care, the fee splits: the surgeon bills the CPT with modifier 54 (surgical care) and the comanaging OD bills the same CPT with modifier 55 (post-op management), with the date care was assumed and the number of days managed. Three operational rules keep this clean: the transfer of care must be documented in writing, the patient must be informed and agree, and both parties' claims must align on dates. Mismatched comanagement claims are a common and completely avoidable denial source.
Where practices leak money
The most common leak is reflexive bundling: front-desk and billing staff see any visit within 90 days of surgery and assume it's free. A patient who returns at week six saying 'my other eye has gotten blurry' is not a post-op visit. Practices with high surgical volume should audit a sample of zero-charge visits inside global periods each quarter — many contain legitimately billable evaluations that were never coded.
Build the tracking habit
Your PM system should flag every patient's global period end date. A simple monthly report — all visits inside active global periods, with their charge status — takes an hour to review and routinely surfaces missed revenue. It's exactly the kind of recurring administrative audit that a trained eye care virtual assistant can own end to end; see how practices plug that gap at a flat $10/hour.
.png)
.png)
.png)
