OHIP Billing Guide🩺 ServicePublished 2026
C465

C465 OHIP Billing Code: Comprehensive Infectious Disease Consultation

Learn about billing for the C465 consultation code used in infectious disease scenarios and eligibility criteria for fee claims.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference205.90 CAD~4 min read

1What Is the C465 OHIP Code?

What is C465?

C465 is an OHIP billing code for consultations provided by infectious disease specialists, primarily in a non-emergency hospital in-patient setting. This code applies to consultations where a comprehensive assessment is necessitated by the complexity or severity of a patient's infectious disease condition.

Infectious disease consultations via C465 are commonly requested by the ward team to advise on antimicrobial selection or to investigate the source of a fever during a hospital admission. These consultations are critical for patient care, particularly in complex cases with potential for rapid deterioration due to infectious agents.

It is important that C465 is not missed in applicable scenarios, as incomplete or incorrect billing can result in reduced reimbursement rates. Overlooking the specifics of documentation, such as a written referral and record of consultation times, can cause delays in payment or adjustments to a lesser fee.

2Related Codes

CodeNameFrequencyDescription
A275Limited consultationFrequency varies by serviceUsed for limited consultations with a lower payout than comprehensive consultations.
A460Comprehensive infectious disease consultationFrequency varies by serviceUsed for comprehensive evaluations requiring detailed examination and reporting.
A465ConsultationConsultation rendered outside of hospital inpatient settingsEquivalent service to C465 rendered outside a hospital inpatient setting.
A466Repeat consultationDependent on necessity for re-evaluationUsed for repeat consultations when ongoing management evaluation is required.

3Eligibility Requirements

Eligibility for Billing C465

  • Setting: The service must be rendered in a non-emergency hospital in-patient setting as outlined in the Infectious Disease listing.
  • Consultation Basis: A written request from a referring physician, nurse practitioner, or dental surgeon is required. The consultation must follow a referral with a detailed written report sent back to the referring party.
  • Timing and Frequency: Only one consultation per same patient, same physician, same diagnosis is allowed within two consecutive 12-month periods, unless the second service occurs more than 12 but less than 24 months after the first for hospital in-patients or emergency department patients.
  • Virtual Care: C465 can be billed for virtual consultations if conducted via video, referenced as C465A. Telephone consultations are not eligible for virtual billing.
  • Documentation: Start and stop times of the consultation must be recorded in the patient's medical record. Failure to meet these criteria may result in reduced fees.

For further information, see General Preamble GP40 to GP48 regarding hospital service listings.

4What Your Clinical Note Must Show

1Medical Record Documentation

To ensure full payment for C465, complete and accurate records are mandatory.

  • Record the start and stop times of the consultation in the patient's permanent medical record.
  • Include a copy of the written consultation request from the referring professional.
  • Maintain detailed notes of the assessment leading to the consultation report.

5Weak vs. Strong Note Examples

The strong note succeeds by providing comprehensive details, referenced start and stop times, and a documented referral and consultation report. The weak note lacks specificity and necessary documentation.

Weak Note

Consultation with patient regarding antimicrobial therapy. Discussed options, no further action.

Strong Note

In-depth consultation with patient on antimicrobial therapy initiated at the request of Dr. Smith. Assessed febrile condition and recommended adjustments to current treatment plan.

Provided detailed report back to the referring physician with recommendations.

  • Start Time: 10:00 AM
  • End Time: 11:15 AM
  • Referral request and consultation report stored in the patient record.

6Common Reasons This Code Is Missed

1
Lack of Written Referral
Omitting the written referral results in ineligibility for full consultation fee.
2
Incomplete Time Recording
Failure to document the start and end times can reduce payment to a lesser fee.
3
Improper Virtual Delivery
Telephone consultations billed as C465 without video format are ineligible for virtual care payments.
4
Excessive Frequency
Exceeding the consultation limit for the same diagnosis can lead to denial or reduced payment rates.
5
Incomplete Documentation
Missing consultation summaries and feedback to the referring physician can lead to payment adjustments.
Document C465 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 C465?
The fee for C465 is CAD 205.90, provided all billing and documentation requirements are satisfied.
How often can C465 be billed for the same patient under the same diagnosis?
Typically, C465 can only be billed once per two consecutive 12-month periods, except under specific conditions allowing a second eligible consultation.
What types of referrals justify a C465 consultation in infectious disease?
Referrals often involve complex cases such as antimicrobial therapy decisions or unexplained fever requiring specialist input.
Can C465 be billed for consultations conducted over the phone?
No, C465 can only be billed for virtual consultations conducted via video, not by phone.
What scenarios typically require a hospital in-patient infectious disease consultation?
Common scenarios include consulting on antimicrobial choices or evaluating persistent fevers during a patient's hospital admission.
How should a consultant record the consultation times for C465 billing?
Start and end times must be documented in the patient's permanent medical record to qualify for the full consultation fee.
Can C465 consultations be repeated within the same year for unrelated diagnoses?
Yes, consultations for an unrelated diagnosis can be billed once every 12 months.
What must be included in the consultation report for C465?
The report should include findings, opinions, recommendations, and details of the consultation, sent back to the referring physician or practitioner.
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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