OHIP error code EH1: service date before the eligibility start date

Why it fires

• The patient had recently registered or re-registered, and coverage begins after the date you provided the service.
• A patient returning to Ontario has a new coverage start date later than the service.
• A newly issued health number carries a start date that postdates the encounter.
• The service date was keyed incorrectly, placing the encounter before coverage began.

EH1 compares your service date against the start of coverage on the ministry record and finds the service came first. The patient may be fully covered today. The question the ministry is answering is narrower: was this person covered on the day the service happened.

It is the counterpart to EH4, which fires when the service falls after coverage ended, and it is distinct from EH5, which says the date does not fall inside an eligible period at all. Reading the three together tells you the shape of the coverage record rather than only that something is wrong with it.

The version specialists meet most often involves a patient in transition. Someone who has recently registered, re-registered after time outside the province, or received a new number will have a coverage start date attached to that registration. Work provided before that date is outside the coverage the ministry holds, even where the patient presents a valid card at the appointment. Because the card scans normally, the front desk has no signal at the time of the visit.

What it costs

The claim is refused for that date. Where the patient was genuinely not yet covered, no corrected resubmission will produce payment, so the value of the follow-up depends on establishing which of the two situations you are in.

The recoverable cases are data cases. A service date entered a year early, a claim attached to the wrong patient, or a number belonging to a family member all produce EH1 and all correct cleanly.

The unrecoverable cases are coverage cases. If the encounter genuinely predates the coverage start date, the service sits outside the insured system for that date, and the practice needs to know that early rather than after several resubmission attempts.

How to fix it going forward

• Ask about recent moves to Ontario or recent re-registration at booking, not at the appointment.
• Validate the health card at the visit and note the coverage the ministry holds rather than the card alone.
• For a patient who mentions a new or replacement card, confirm the coverage start date before a high-value consultation.
• Check the service date on the claim against the chart before treating EH1 as a coverage problem.

Booking is the practical place to catch this, because that is the only point where someone speaks to the patient before the work is done. A patient who has recently arrived or recently re-registered is the population this code affects.

Where the coverage start date is genuinely later than the appointment, the decision about the encounter belongs to the practice and the patient before the service, not to the billing office afterwards. Discovering it on the error report removes every useful option.

Is it recoverable?

Recoverable by resubmission inside the window

Where the service date or the patient identifier was wrong, correct it and resubmit inside the three-month window. Where the encounter genuinely predates coverage, the claim is not payable by OHIP for that date.

Confirm the service date against the chart and the health number against the card before doing anything else. Those two checks resolve the recoverable share of EH1 rejections quickly.

Where coverage began after the encounter, resubmission will not change the outcome. If the ministry later adjusts the coverage start date and the three-month window has closed, the claim may be recoverable by written application where documentation supports it.

Related codes

• EH4: service date after the eligibility end date
• EH5: service date outside the eligible period
• VH9: health number not registered with the ministry
• VH8: date of birth does not match the health number

Frequently asked questions

What does OHIP error code EH1 mean?

EH1 means the date of service falls before the date the patient’s OHIP coverage started on the ministry record. The patient may be covered now and was not covered on the service date.

The patient showed a valid card. Why did EH1 fire?

A card that scans confirms the number, not the coverage period. If the patient recently registered or re-registered, the coverage start date attached to that registration can fall after your appointment.

Is EH1 worth resubmitting?

Only after checking the service date and the health number against the chart and card. If those were wrong, correcting them clears it. If the encounter genuinely predates coverage, resubmission repeats the rejection.