OHIP Billing Guide🩺 ServicePublished 2026
C845

C845 OHIP Billing Code: Streamlined Oncology Consultations in In-Patient Settings

C845 is used for limited oncology consultations for hospital in-patients, answering focused oncological questions. Specific to oncology, it requires precise documentation.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference115.95 CAD~3 min read

1What Is the C845 OHIP Code?

The C845 billing code represents a limited oncology consultation service for in-patients in Ontario. This code is utilized when an oncologist is consulted for a narrowly focused opinion on a specific oncological question. For instance, determining whether an incidental lesion requires staging or if chemotherapy is appropriate given a new patient complication.

This type of consultation typically involves a concentrated assessment rather than a comprehensive evaluation. It is crucial for clinicians to select between C845 and other consultation codes based on the actual service provided, as there can be confusion due to similar fees with the C446 repeat consultation code.

Ensuring the correct code is selected prevents discrepancies and potential claim rejections; thus, thorough documentation of the consultation’s limited scope is essential.

2Related Codes

CodeNameFrequencyDescription
A445A445 ConsultationMedical Oncology listings$183.40, full consultation service
A446A446 Repeat consultationMedical Oncology listings$115.95, equivalent to limited repeat consultation
A845A845 Limited consultationMedical Oncology listings$115.95, for out-patient limited consultations
C445C445 ConsultationMedical Oncology listings$183.40, full consultation service

3Eligibility Requirements

C845 may be billed for a limited oncology consultation provided to hospital in-patients and is payable under OHIP at a fee of CAD 115.95.

Virtual Delivery:

  • C845 can be rendered virtually and billed as C845A, under the 'VIDEO ONLY' criteria. It is not eligible for telephone delivery.

Billing Frequency:

  • One service per two consecutive 12-month periods for the same patient, physician, and diagnosis.
  • One service every 12 months for clearly defined unrelated diagnoses.

Equivalent Code for Out-Patients:

  • The corresponding out-patient code is A845, applicable for similar services rendered outside inpatient settings.

4What Your Clinical Note Must Show

1Required Documentation for C845

Ensure comprehensive and specific documentation:

  • Patient history and presenting complaint
  • Specific oncological question addressed
  • Consultation outcome and recommendations
  • Date and setting of the service rendered

5Weak vs. Strong Note Examples

The strong note includes specific details about the clinical question and the recommendations given, while the weak note is vague and does not convey the scope or outcome of the consultation.

Weak Note

Consultation done. Discussed with team.

Strong Note

Patient presented with new CT findings suggesting an incidental lesion.

Consultation requested to determine if staging is necessary. Reviewed patient's medical history and current presentation.

Recommendations: Staging recommended based on identified factors.

  • Clear description of the clinical question and need for consultation.
  • Specific recommendations provided.
  • Details enabling proper claim processing and follow-up.

6Common Reasons This Code Is Missed

1
Confusion with Repeat Consultation
C845 may be misused when the consultation is actually a repeat due to similar fees.
2
Incomplete Documentation
Failure to thoroughly outline the specific oncology question addressed can lead to billing errors.
3
Virtual Platform Errors
Incorrect billing for virtual consultations not done through appropriate video platforms.
Document C845 correctly — every time
Empathia's templates automatically structure your notes to capture every required element for audit-proof billing.

8Frequently Asked Questions

What is the fee for billing C845?
The fee for C845 under OHIP is CAD 115.95.
Can C845 be billed in conjunction with other consultation codes on the same day?
C845 cannot be billed with another consultation code on the same day for the same patient and diagnosis.
What qualifies as a limited oncological consultation for in-patients?
Typical cases involve narrow questions, such as whether an incidental lesion requires staging or if chemotherapy should proceed given a new complication.
How does a limited consultation differ from a full consultation in oncology?
A limited consultation focuses on a specific question, while a full consultation addresses the patient's overall oncological management.
What should be considered when referring a patient for a limited consultation?
Referrals should typically involve specific oncological queries during a patient's hospital stay.
Under what circumstance can C845 be billed virtually?
C845 can be billed virtually when conducted via video, not eligible for telephone consultations.
What if the patient’s condition requires frequent limited consultations?
Frequency limitations apply; only one limited consultation can be billed per two consecutive 12-month periods for the same patient and diagnosis.
Disclaimer: This article is intended as a general educational resource for physicians and billing staff. It does not constitute billing advice or a definitive interpretation of the OHIP Schedule of Benefits. Always verify current billing codes, eligibility criteria, and documentation requirements directly against the official Schedule of Benefits or consult with a qualified medical billing specialist.
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