Fee Schedule Drift: What Changes When You're Not Watching (And How to Spot It)

OHIP fee schedule changes for Ontario physicians do not arrive in a single notification. They are distributed across ministry INFOBulletins, PDF tables, staged Medical Claims Adjustments, and system load dates that often trail the stated effective date by weeks. The gap between when a policy change is published and when your claims system actually processes it correctly is where revenue quietly disappears.

For related context, see Your Path To Practicing In Ontario Starts Here Immigration Mindset Amp Initial Strategy. We call this fee schedule drift. It is not a billing error in the traditional sense. Physicians and clinic administrators are not negligent; the system genuinely disperses information across multiple channels with no unified alert. What follows is a plain-language breakdown of what changed in the 2026 cycle, how the three layers of payment change work, and a 90-day audit method you can run against your own remittance data.

The April 1, 2026 PSA Reset: New Codes, Delisted Codes, and Surgical Unbundling

The 2024 Physician Services Agreement drove a substantial restructuring of the fee schedule effective April 1, 2026. Bulletin 260304 documents the core changes: permanent fee code adjustments that replace the temporary relativity payments that had been issued as separate line items on remittances.¹

As our team explains it: the billing code stays the same, but the payment may be revalued invisibly on the remittance because OHIP is paying the updated fee, not a separately itemized temporary bonus. If your billing staff or software was tracking the temporary relativity payment as a distinct revenue line, that line disappears after April 1. The underlying fee code value is now higher, but if you were not expecting the presentation to change, it can look like a payment was removed rather than restructured.

The April 1 bulletin also covers surgical unbundling of pre- and post-operative care, integration of the Internal Medicine Office Premium into tariff values, new MAID codes, revised technical fee values, and unit fee increases. Each of these categories creates its own drift risk. Delisted codes that were in your billing template before April 1 will generate rejections after. New add-on codes that are now billable will generate no rejection if you miss them, they simply generate no revenue.

For specialists in internal medicine, endocrinology, neurology, and cardiology, this bulletin is particularly worth working through carefully. Many of the premium-embedded changes affect exactly the service patterns those practices see most frequently.

Relativity vs. Tariff Value: Why Your RA Got Bigger Even Though the "Fee Schedule Didn't Change"

Bulletin 260307 documents a 5.3700% global relativity increase for 2026–27.² The Ministry's own language states that the Schedule of Benefits values have not changed. And yet, physicians in affected specialties see larger payments on their remittance advice.

The mechanism is derived specialty assignment: Your billing specialty determines which relativity multiplier applies to your claims. If your derived specialty assignment is correct, you receive the full 5.3700% uplift. If it is incorrect or stale from a prior bulletin cycle, you may be receiving a lower multiplier, or no uplift at all, without any rejection code to flag the problem.

This is the silent misbilling risk for clinic operators: a bigger remittance does not prove the clinic's software is fully current. It only proves OHIP paid the claim under the rule set that was active that day. If the next bulletin changes derived specialty assignments, a clinic that stopped checking its mappings may keep billing the wrong bucket until the discrepancy shows up later in adjustment or audit processing. The specific risk is that claims continue to go out under an outdated derived specialty assignment, and the error persists until audits, reversals, or underpayment and overpayment recovery notices surface it. For a clinic, the first visible symptom may be financial reconciliation trouble, not a clean rejection at the time of submission.

The practical takeaway: after each bulletin release, verify that your billing software's specialty assignment mapping reflects the current relativity tables. See also our breakdown of how Ontario billing systems handle Fee Schedule Master updates, the update cycle varies significantly by vendor, and the timing matters.

The Staging Problem: Why May and June 2026 Updates Still Affect April Claims

This is where fee schedule drift becomes most costly and least visible. Bulletin 260506 covers staged implementation of add-on codes and hospital technical fee reduction rules that were part of the April 1 policy but not yet loaded into the claims system in time for April submissions.³

The effective date governs entitlement, but the claims system's load date governs whether the claim can be processed cleanly on first submission. If the code was not yet in the system when you submitted your April claim, that claim may bounce or sit unpaid until the file update lands. Afterward, only claims already in the system's queue are likely to be fixed automatically through adjustment processing.

For physicians, the safest workflow is to monitor the error report and remittance status, then re-bill only if the claim came back as a true rejection rather than a payable claim awaiting MADJ adjustment. The Ministry's March and April updates direct physicians to update their billing software by early April so the current Fee Schedule Master is in place before or shortly after the start date, but the staged May bulletin means that window extends further than most clinics anticipate.

Bulletin 260506 specifically identifies codes E150A, G545A, B603A, and S197A as requiring attention, with distinct resubmission triggers. These are not catch-all codes; they represent real service patterns in hospital and specialist settings. If any of these codes appear in your April claims and the payment status is unclear, this bulletin is worth pulling directly.

The MADJ wave associated with these staged changes will correct some underpaid claims automatically. It will not correct claims that were rejected outright, claims submitted under wrong specialty assignments, or claims where the code itself was delisted before your billing template was updated.

Primary Care and FHO+: Premium Shifts That Don't Show Up in Fee Code Values

For practices with Family Health Organization models, or any clinic that has both primary care and specialist physicians billing under one roof, the April 1, 2026 changes introduce a third layer of change that operates entirely separately from fee code values and relativity adjustments.

Bulletin 260308 documents the Blended FFS premium increase from 19.41% to 30% for eligible in-basket shadow-billed FHO claims, an after-hours premium increase to 50%, the end of the access bonus, and the end of comprehensive care capitation.⁴ Bulletin 260316 further defines core and excluded service reclassifications by contract type.⁵

The sequencing error Ross sees most often in mixed-model practices is modeling the premium increase and the access-bonus elimination as if they hit the same revenue base in the same way, without first separating which services are actually shadow-billed FHO claims versus which revenue streams were formerly receiving the access bonus. That usually leads clinics to overstate the net gain, because the 30% premium applies to eligible in-basket shadow-billed claims, while the access bonus ends as a separate payment stream on April 1, 2026.

A clinic with internal medicine or endocrinology plus attached FHO primary care is especially prone to this error because the primary care side is directly affected by the BFFS premium and access-bonus changes, while the specialist side may not be affected in the same way, or at all. One physician's gain can mask another's loss if you do the analysis only at the clinic aggregate level.

The safer order: identify each physician's billing bucket first, find the services and claims that would earn the 30% premium, remove the access-bonus line, then compare the new totals by provider. Then roll up to the clinic level. That transparency gives management a clear view of the practice, its patients, and each provider's contribution. It also makes it much easier to spot when a specific physician's payment has drifted in the wrong direction.

It is also worth noting that for specialists in particular, endocrinology, neurology, cardiology, and other internal medicine physicians, the recovery opportunities extend well beyond fee code adjustments. Complex patient billing, regular encounter documentation, case conferences, and other service-specific codes represent real revenue that frequently goes uncaptured when billing workflows are built around routine volume rather than patient complexity. The billing opportunities are in the details of what actually happens in your clinic, not just in the fee schedule document.

A 90-Day Claims Drift Audit You Can Run This Week

This is not a theoretical exercise. Operators we work with who run this audit against 90 days of remittance data regularly surface 4–8% in back-claims they were entitled to but did not receive, and that is before addressing forward-looking improvements to billing workflows.

Here is the methodology:

Step 1: Pull your last 90 days of Remittance Advice data. You want a complete picture of what was submitted, what paid, what rejected, and what paid at zero. Export this into a format you can sort by service code.

Step 2: Cross-reference your highest-volume codes against the current Fee Schedule Master. The Fee Schedule Master is the authoritative document; your billing software's internal fee table is a derived copy that may not reflect the most recent bulletin. Flag any code where the fee on your RA differs from the current Schedule value.

Step 3: Check for delisted codes in your claim history. Any service code that appears in Bulletin 260304's delisted list and also appears in your April 2026 or later claims should be investigated. A delisted code that paid is worth understanding, it may reflect a MADJ correction or a grandfathering provision. A delisted code that rejected is a resubmission candidate using the correct successor code.

Step 4: Verify hospital technical fee assignments if applicable. Bulletin 260506 includes hospital technical fee reductions that apply to specific service settings. If your practice bills any hospital technical fees, confirm your software's setting assigns the correct technical component value under the post-April rules.

Step 5: Confirm your derived specialty assignment is current. Pull the specialty designation on file with OHIP and compare it against the Bulletin 260307 relativity tables. If your specialty has a derived assignment that changed in 2026, verify your remittances reflect the correct multiplier.

Step 6: Set a calendar reminder for the next bulletin cycle. The quarterly rhythm is not perfectly regular, but major changes cluster around April 1, with staged updates in May and June. A standing quarterly review, two weeks after each fiscal quarter start, gives you a window to catch load-date lag before it becomes a six-month drift problem.

This kind of structured lookback is exactly what we walk through with clinics as part of a billing gap analysis. Understanding what medical school did not teach you about OHIP and Medicare billing is often the first step in recognizing that the system's opacity is not your fault, and that a structured process changes the outcome. If you are curious whether your current billing setup is capturing what you are entitled to, our piece on the true cost of DIY OHIP billing walks through what that gap typically looks like in dollar terms.

Ready for the next step? Free OHIP billing review.

Frequently Asked Questions

How often does OHIP update the fee schedule?

The Ministry of Health releases INFOBulletins on a rolling basis throughout the year, with major fee schedule updates typically tied to the April 1 fiscal year start. Staged implementation bulletins often follow in May and June, meaning a single policy change can arrive across three or more separate bulletins. Clinics that review bulletins only at the April start date routinely miss the May and June staged updates that affect April-dated claims.

What is the difference between a relativity adjustment and a fee code value change?

A fee code value change alters the dollar amount printed in the Schedule of Benefits for a specific service code. A relativity adjustment applies a global multiplier across a specialty's entire payment basket without changing the Schedule of Benefits values themselves. In 2026–27, the global relativity increase is 5.3700%, so your remittance may be larger even though the Schedule document looks unchanged. Conflating these two mechanisms is one of the most common reasons clinic-level revenue projections are wrong.

Why are my April 2026 claims rejecting for codes I have billed for years?

The effective date of a fee schedule change and the load date in OHIP's claims system are not always the same. If OHIP's system had not yet loaded a new or revised code when your April claim was submitted, the claim may have bounced or paid at zero. Bulletin 260506 documents staged May updates that affect April-dated claims, and specific codes require resubmission rather than automatic MADJ correction. The error report on your remittance is the place to start diagnosing which category your rejected claims fall into.

Do I need to update my billing software manually after every INFOBulletin?

Your software vendor should push Fee Schedule Master updates, but the timing varies by vendor and bulletin type. A larger remittance does not confirm your software is fully current, it only confirms OHIP paid under the rule set active that day. If a subsequent bulletin changes derived specialty assignments and your software is not updated, you may continue billing the wrong bucket silently until an audit or underpayment notice surfaces the error. Verifying software version against bulletin release dates after each major update is a worthwhile standing task.

What is a Medical Claims Adjustment (MADJ) and will it fix my underpayments automatically?

A MADJ is a Ministry-initiated retroactive correction applied to claims that qualified for a fee change but were submitted before the system was updated. Not every underpayment triggers a MADJ. Claims that were outright rejected, used delisted codes, or were submitted with incorrect specialty assignments typically require manual resubmission. MADJ covers a subset of affected claims, it is not a complete safety net, and treating it as one is one of the main reasons drift goes undetected for quarters at a time.

If you want to know exactly where your last 90 days of claims stand against the current fee schedule, we are glad to work through that with you. Schedule your free OHIP billing review and we will pull the data together and show you what we find.