Ontario public/private coordination · Reviewed 2026-06-07

Trillium, private insurance, and ODB

Regular ODB usually goes first. Trillium with private insurance usually does not.

What to bill first

For most ODB patients, bill ODB first. If the patient has private insurance, bill the private plan after ODB for anything left.

For Trillium patients who also have private insurance, bill the private plan first until the household has paid its Trillium deductible for that quarter. The patient keeps the receipt. Trillium counts the eligible amount the household actually paid.

What does not count

Money paid by private insurance, a drug company, or a discount card does not lower the Trillium deductible. Only the household's own eligible out-of-pocket drug costs count.

After the deductible

After the quarterly deductible is paid, Trillium can pay eligible drugs for the rest of that quarter. Do not promise that from the card alone. Use what the pharmacy computer says the patient owes today, or current confirmation from Trillium.

Days supply

The current Trillium guide calls this “limits to the amount of drugs I can get at one time.” In plain language, do not assume every Trillium fill can be sent as 100 days.

August 1 to February 20Up to 100 days at one time, if the drug, prescription, and claim are otherwise eligible.

February 21 to July 31The 100-day limit starts dropping by one day each day. February 21 is 99 days, February 22 is 98 days, and so on.

The reason is deductible timing. TDP cannot let a paid claim carry too far past the quarter or program year while the household still has deductible accounting to settle.

The ODB Reference Manual says TDP pays the lesser of a 100-day supply or the amount needed to reach up to 30 days after the TDP eligibility period. For Q3 claims where the annual deductible has not been met, the paid supply cannot go more than 30 days past the end of the quarter. HNS calculates this and rejects the excess.

So your shortcut is mostly right: Q1 and Q2 are the clean 100-day window. After February 20, shorten the days supply to the calculated limit instead of forcing a 100-day TDP claim.

Private insurance coordination in plain language

A normal secondary claim is visible at the point of sale: the first payer leaves a balance, the second payer sees the balance, and the claim response shows what the patient still owes. Trillium coordination is not always that clean. When a household has private insurance and has not met the quarterly Trillium deductible, the pharmacy may be collecting a private-plan copay that the family later uses for Trillium deductible accounting.

Private plan pays firstThe pharmacy bills the private plan. The patient keeps receipts for eligible out-of-pocket drug costs.

Trillium deductible is household-basedOnly eligible costs actually paid by the household reduce the quarterly deductible. Third-party payments do not.

After deductible is metTrillium can become the payer for eligible ODB drugs for the rest of the quarter, subject to plan rules and any remaining copay.

Pharmacy message to patientKeep the receipt, confirm deductible status with Trillium, and do not assume a card means the deductible is already met.

Counter workflow

Start by identifying which program is actually being used. A patient may say “ODB” when they mean Trillium, or may show a Trillium notice while the private plan is still responsible for the first claim. Ask whether they have private insurance, whether the household deductible has been met for the current quarter, and whether Trillium has asked them to submit receipts.

If private insurance exists and the deductible is not met, process the private plan first and give a clear receipt. The receipt matters because Trillium cannot count what the household cannot document. Avoid saying “Trillium rejected” when the real issue is that the deductible period is still open or the days supply is beyond the calculated limit.

If the claim rejects for days supply, treat the response as a quantity-limit calculation rather than a clinical refusal. The safe next step is to reduce the days supply to the paid limit shown by the system or to a smaller supply that stays inside the quarter/program-year rule. A forced resubmission at 100 days can create a cycle of avoidable rejects.

Examples

Example 1: A household is in the first half of the Trillium program year, the deductible has been met for the quarter, and the prescription is otherwise eligible. A 100-day claim may be reasonable if the prescription, product, and payer response support it.

Example 2: The patient has private insurance and is still accumulating out-of-pocket costs for the quarter. The private plan is billed first. The patient keeps the receipt because the private plan payment itself does not reduce the Trillium deductible.

Example 3: A late-quarter Trillium claim rejects because the supply carries too far past the eligibility period. The practical correction is not “try a different intervention code.” It is to reduce days supply to the calculated limit and document why the quantity changed.

Documentation note

For audit-safe notes, record the quarter context, whether private insurance was billed first, the patient-paid amount shown on the receipt, the days supply submitted, the days supply accepted, and any instruction given to the patient about Trillium receipts or deductible confirmation. Keep the note factual. Do not document assumptions about the household’s full deductible file unless Trillium or the patient’s paperwork actually confirms it.

Bottom line: TDP coordination is a deductible and eligibility-period workflow. The pharmacy sees the claim in front of it; Trillium sees household deductible accounting. Good receipts and conservative days-supply correction prevent most of the confusion.

Sources used

FRx guide page · Static editorial reference · Last reviewed 2026-06-07