5 Ways to Reduce OHIP Claim Rejections

Every rejected claim costs you twice — once in lost revenue, and again in the time spent fixing and resubmitting. For busy Ontario physicians, claim rejections are one of the biggest drains on productivity.

Here are the five most common causes of OHIP rejections and what you can do about each one.

1. Validate Health Cards Before Billing

An expired or invalid health card is the single most common reason claims get rejected. The Ministry won't process a claim if the card number doesn't match their records.

What to do: Run a Health Card Validation (HCV) check through EDT before submitting. SnapBill does this automatically in bulk — validating every patient's card before your claims go out.

2. Match Diagnostic Codes to Fee Codes

OHIP requires specific diagnostic code pairings for certain fee codes. Billing A004 with an incompatible diagnostic code triggers an automatic rejection.

What to do: Learn the common pairings for your specialty. You can look up valid pairings in our OHIP billing codes reference. SnapBill's validation engine flags mismatches before submission, so you catch them early.

3. Respect Daily and Annual Maximums

Some fee codes have caps — per patient, per day, or per year. Exceeding these limits means the extra claims bounce back.

What to do: Track your billing volumes. SnapBill monitors maximums and warns you when you're approaching a limit.

4. Avoid Duplicate Submissions

Submitting the same claim twice — even accidentally — results in a rejection for the duplicate. This happens more often than you'd think, especially when switching between billing systems.

What to do: Use a system that tracks submission status. SnapBill deduplicates automatically, so you never submit the same claim twice.

5. Submit Before the Deadline

OHIP has strict submission windows. Claims submitted after the 18th of the month may roll to the next payment cycle — and claims submitted past the 6-month window are rejected entirely.

What to do: Bill daily or weekly, not monthly. SnapBill's bulk processing makes it easy to submit your entire day sheet in minutes.

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The Bottom Line

Most rejections are preventable. Automated validation catches the majority of errors before they reach OHIP, saving you hours of rework each month. For more on reviewing what gets paid and rejected, see Understanding Your OHIP Remittance Advice.

Ready to stop chasing rejections? Try SnapBill free — automated validation included on every plan.