All codes
B603
B603 – B603
OHIP Paediatrics Code · Schedule of Benefits
When to Use
- B603 is appropriate for a physician providing a consultation for a patient referred by another physician for a complex diagnostic dilemma that cannot be resolved by standard investigations.
- Use B603 when a patient requires a comprehensive assessment and management plan for a rare or undiagnosed condition, involving extensive review of prior records and specialized testing.
- B603 is indicated for a physician who performs a detailed history, physical examination, and reviews multiple diagnostic modalities for a patient with a suspected complex systemic disease.
Common Pitfalls
- Billing B603 for a routine follow-up visit or a simple consultation that could be billed under an intermediate or general assessment code (e.g., A007, A001) is a common error.
- Failure to document the complexity of the diagnostic dilemma, the extensive review of records, or the need for specialized investigations can lead to claim rejection or audit issues for B603.
- Submitting B603 when the patient's condition is adequately managed by the referring physician or could be addressed by a specialist in a different discipline without requiring a comprehensive diagnostic workup.
Billing Tips
- Ensure the referral note clearly outlines the diagnostic uncertainty and the specific questions the patient's family physician expects B603 to address.
- Detail in the patient's chart the specific complex investigations reviewed and the rationale for their necessity in reaching a diagnosis or management plan.
Provider Fee$0.00
Specialist Fee$9,195.80
Effective: April 1, 2026
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