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C933
C933 – On-call admission assessment
OHIP Surgical Procedures Code — CONSULTATIONS AND VISITS · Schedule of Benefits
An on-call admission assessment for a non-emergency hospital in-patient, rendered by a family or general practitioner. As an admission assessment, this service is the initial assessment for the purpose of admitting a patient to the hospital, as defined in . Its eligibility and how it's defined (e.g., as a consultation, general assessment, or general re-assessment) depends on whether the admitting physician has previously assessed the patient for the same illness within the preceding 90 days. This service is subject to the same conditions as A933.
When to Use
- Use C933 when you are the on-call physician performing the initial admission assessment for a non-emergency inpatient admission.
- Use this code when you are admitting a patient to the hospital and have not seen them for the same illness within the preceding 90 days, effectively functioning as a consultation.
- Use C933 for the initial assessment of a patient transferred to your care, provided no other physician has already claimed an admission assessment for this specific hospital stay.
Common Pitfalls
- Billing C933 when a pre-operative assessment was already performed by you for the same patient within 30 days of the admission, which violates the payment adjustment rules.
- Attempting to claim C933 in addition to A933 for the same patient encounter, as these codes are mutually exclusive and restricted against each other.
- Submitting C933 for a patient transfer when another physician has already billed an admission assessment for that same admission, leading to automatic adjustment to a lower fee.
Billing Tips
- If you are an eligible hospitalist, ensure your billing software is configured to trigger the 17% premium on C933, as this is not applied automatically by the Ministry.
- Verify the patient's recent history for the same illness; if you have seen them within 90 days, C933 may be adjusted to a general re-assessment fee rather than the full consultation rate.
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