5 OHIP Billing Mistakes Ontario IHFs Make Under Bill 60

Ontario independent health facilities are built for throughput. Cataract lists, orthopedic procedures, gynecology cases, and general surgery days all depend on repeatable workflows. That strength becomes a weakness when billing rules, documentation habits, and rejection follow-up do not keep pace with clinical volume.

The most expensive OHIP billing mistakes are not always rejected claims. A rejected claim is visible. Someone sees it, asks what happened, and tries to fix it. The quieter problem is underbilling. The clinic submits a claim, OHIP pays the amount requested, and no one realizes a valid assistant fee, complexity premium, secondary procedure, or time unit was missed.

For physician-owners operating under Bill 60 and ICHSCA, that leakage can sit inside normal operations for months. The administrative team is busy. Surgeons are focused on care. Billing staff may be capable and careful, but they are not always trained to audit every claim against operative documentation and the Ontario Schedule of Benefits.

Mistake 1: Not billing the surgical assistant fee

Assistant fee leakage is common because it depends on more than whether another clinician was present. The claim needs to reflect the assist, the documentation needs to support the assist, and the billing workflow needs to catch cases where the role was clinically appropriate but not coded.

High-volume cataract and orthopedic clinics are especially exposed. A small missed assistant fee repeated across a full list can become a substantial annual gap. The fix starts with a reconciliation step: compare OR staffing records, operative notes, and submitted claims. If the assistant appears in the clinical record but not the billing record, the case deserves review.

Clinics should also standardize how assistant involvement is documented. Sparse notes force billing teams to make conservative choices. Clear operative language gives them a stronger basis for claiming what was actually done.

Mistake 2: Missing complexity modifiers due to sparse operative notes

Complexity modifiers are often missed because the clinical work is obvious to the surgeon but invisible to the billing process. A difficult exposure, unusual anatomy, complications, extensive adhesions, or additional intraoperative work may be known in the room but not written in a way that supports a different billing treatment.

This is not about padding claims. It is about aligning the claim with the documented clinical reality. If the operative note does not describe the complexity, billing staff cannot safely apply the premium. If the note does describe it but no one audits the claim, the premium may still be missed.

The practical fix is documentation coaching by specialty. Cataract clinics need language around secondary intraoperative work and lens complexity. Orthopedic clinics need clear descriptions of factors that increase surgical difficulty. Gynecology clinics need specificity around diagnostic findings, additional procedures, and post-op classification.

Mistake 3: Anaesthesia time units not reconciled against OR time

Time-based billing errors are easy to miss because the source records live in different places. Anaesthesia time may be recorded in one system, OR time in another, and the submitted claim in a billing platform. When those sources are not reconciled, discrepancies become normal.

The clinic may be underbilling time units, missing adjustments, or failing to catch patterns where submitted time does not match the clinical record. In a busy IHF, no single person may own the full comparison.

A monthly reconciliation can catch outliers. Pull the anaesthesia record, OR schedule, and submitted OHIP claim for a sample of cases. Look for large gaps, repeated default values, and cases where the submitted time appears rounded or copied from a template. The goal is not to challenge every minute. The goal is to find systematic leakage.

Mistake 4: Secondary procedure codes folded into the primary code

Secondary procedures are frequently lost inside the primary case narrative. The surgeon performs additional clinically necessary work, the operative note mentions it briefly, and the billing process treats the encounter as if only the main procedure occurred.

This pattern appears in cataract cases with secondary intraoperative steps, gynecology cases with additional findings or procedures, and general surgery cases where unbundling opportunities need careful review. The risk is not only missed revenue. It also creates poor feedback loops for documentation, because the clinic never learns which note details matter.

The fix is a specialty-specific audit checklist. Review a sample of cases for secondary work, compare each finding to the submitted code set, and separate valid opportunities from items that are bundled or unsupported. Over time, the checklist becomes part of the billing team's normal review process.

Mistake 5: Post-op visits incorrectly classified within global period

Post-op classification is another quiet leak. Some visits are correctly included within a global period. Others may involve separate issues, complications, or care that should be treated differently. When clinics classify too broadly, they may absorb work that should have been billed or documented separately.

The right answer depends on the procedure, timing, diagnosis, and clinical reason for the visit. That is why a blanket rule is risky. The audit should look at the post-op schedule, visit notes, diagnostic context, and submitted claims together.

For clinics adding new surgical volume under Bill 60, this matters because follow-up workflows often expand quickly. A classification habit that was tolerable at lower volume can become expensive when repeated across hundreds of cases.

How to fix the pattern

Start with a controlled sample, not a massive retrospective project. Pull 60 to 120 days of claims, remittance advice, rejections, and operative notes for one specialty. Compare the claims against the April 2026 Ontario Schedule of Benefits and the clinic's documentation. Track findings by category: assistant fees, complexity premiums, time units, secondary procedures, post-op classification, and rejection follow-up.

Then prioritize by deadline and confidence. OHIP's resubmission window means time matters. Cases inside the window with strong documentation should be reviewed first. Weak or ambiguous cases should become documentation coaching, not aggressive resubmission.

Clinic Claims does this work with AI-powered audit technology and certified OHIP billing validation. The AI finds candidates quickly. Human experts confirm what is clinically and billing defensible. Your clinic decides what to submit.

Use the revenue calculator to estimate your potential leakage, or read how we approach cataract OHIP billing audits for high-volume ophthalmology clinics.

Conclusion

Most Ontario surgical clinics are not careless. They are busy. Bill 60 created more procedural volume, more administrative pressure, and more room for small billing misses to compound. The clinics that recover revenue will be the ones that audit early, document clearly, and treat billing accuracy as an operating discipline.

Book a free audit to see your clinic's exact numbers. The first review costs nothing, and recovery estimates are based on OMA data and industry billing audits.