H121 – Minor assessment
OHIP Obstetrics Code — CONSULTATIONS AND VISITS · Schedule of Benefits
A minor assessment rendered by an Emergency Department Physician to an unscheduled patient in an Emergency Department or Hospital Urgent Care Clinic. This service is specifically for care provided during night hours, from 00:00h to 08:00h. According to the definition in , a minor assessment includes one or both of: - a brief history and examination of the affected part or region or related to a mental or emotional disorder; - brief advice or information regarding health maintenance, diagnosis, treatment and/or prognosis. This service is intended for physicians working a designated shift or on-call for the emergency department where the service does not qualify for a special visit premium, as described in . All assessments include the specific elements of assessments () and common elements of insured services (, ).
When to Use
- Use H121 for a brief, unscheduled assessment of a patient in the ED between 00:00h and 08:00h when the clinical encounter does not meet the complexity requirements of an intermediate assessment (H122).
- Use H121 when providing brief advice or a focused examination for a minor complaint during night hours, provided you are not claiming a Special Visit Premium (Table V) for the same encounter.
Common Pitfalls
- Billing H121 in conjunction with a Special Visit Premium (e.g., H112) for the same patient visit, which will trigger an automatic rejection as H121 is restricted from being claimed with Table V premiums.
- Attempting to bill H121 for services rendered outside the 00:00h to 08:00h window, as this code is strictly time-gated to the night shift.
- Confusing H121 with H101; H121 is specifically for ED physicians, whereas H101 is a general minor assessment code that does not carry the same ED-specific night-shift restrictions.
Billing Tips
- Ensure your documentation clearly reflects the 'brief' nature of the history and examination to justify the minor assessment level over an intermediate assessment (H122).
- If you are on-call and qualify for a Special Visit Premium (H112), do not bill H121; instead, bill the appropriate assessment code (e.g., H122) plus the premium.
Effective: April 1, 2026
A. Consultations and Visits
CONSULTATIONS AND VISITS
Assessment
Assessments, Hospital and Institutional Consultations and Assessments
With the exception of ultrasound guidance, (J149) or emergency department investigative ultrasound (H100), ultrasound services listed in this Schedule rendered by an Emergency Department Physician are not eligible for payment.
When any other service is rendered by the Emergency Department Physician in premium hours (and assessments may not be claimed), apply one of the following premiums per patient visit. H112: - nights (00:00h to 08:00h); H113: - daytime and evenings (08:00h to 24:00h) on Saturdays, Sundays or Holidays and Friday Evenings (17:00h to 24:00h); H114: - evenings (17:00h to 24:00h) on Mondays to Thursdays.
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