OHIP Billing Guide🩺 ServicePublished 2026
A471

A471 OHIP Billing Code: Optimize Re-assessments for Complex Respiratory Cases

The A471 billing code is designed for respiratory specialists conducting complex medical specific re-assessments due to the complexity of a patient's condition.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference89.40 CAD~3 min read

1What Is the A471 OHIP Code?

A471 represents the OHIP billing code for a Complex Medical Specific Re-assessment, particularly relevant for respirologists handling patients with severe or complex respiratory conditions. This re-assessment is crucial for patients dealing with intricate, obscure, or severe respiratory conditions, such as progressive interstitial lung disease or severe asthma that's hard to control.

It's essential for respirologists as these conditions often require ongoing adjustments and monitoring to tailor treatment plans effectively. The complexity of these cases underlines the importance of a detailed re-evaluation, ensuring the patient's management plan continues to align with their evolving health needs. Commonly missed billing opportunities arise from a lack of thorough documentation or failure to denote the precise start and end times of the consultation as outlined by OHIP requirements.

2Related Codes

CodeNameFrequencyDescription
A473Medical specific assessmentN/AInitial comprehensive assessment for respiratory disease.
C473Medical specific assessmentN/ASimilar to A473 but applicable to hospital in-patient scenarios.
A474Medical specific re-assessmentN/AGeneral follow-up for respiratory disease less complex than A471.
C471Complex medical specific re-assessmentEquivalent to A471 but for hospital in-patient care.Complex follow-up on hospital in-patients demanding detailed reassessment.

3Eligibility Requirements

To bill for A471 under OHIP, the following criteria must be met:

  • Limitations: Up to four complex medical specific re-assessments per patient by each physician per year are eligible for billing. These may be mixed with other specific re-assessment codes within these frequency limits.
  • Complexity Requirements: This code is applicable when the re-assessment is necessitated by the complexity, obscurity, or seriousness of the patient's condition.
  • Time Recording: The service must not be billed without recording the start and end time of the assessment in the patient's permanent medical record.
  • Virtual Eligibility: A471 can be billed for services delivered virtually, marked as A471A, covering both video and telephone interactions.

4What Your Clinical Note Must Show

1Document Time

The physician must accurately record the duration of the re-assessment.

  • Time service started
  • Time service ended
  • Details recorded on the patient's permanent medical chart

5Weak vs. Strong Note Examples

The strong note succeeds by providing specific details about the patient's condition, the decision making involved, and all requisite timing details, whereas the weak note lacks depth and precise time documentation.

Weak Note

Patient re-assessed due to complex asthma. Adjusted medications.

Strong Note

Conducted a thorough review of the patient due to persistent severe asthma. Previously on high-dose corticosteroids, not achieving optimal control. Discussed and adjusted medications. Next steps involve potential biological treatment options, pending referrals and test results.

  • Start time: 2:00 PM
  • End time: 2:30 PM
  • Patient discussion documented

6Common Reasons This Code Is Missed

1
Lack of Documentation
Failure to record start and end times of the service makes the claim ineligible.
2
Misclassification of Complexity
Billing A471 when the patient's condition doesn't meet the complexity requirements of the code.
3
Exceeding Frequency Limits
Billing for more than four re-assessments within a 12-month period per patient per physician.
4
Inadequate Clinical Justification
Insufficient evidence in the medical record to support the necessity of a complex re-assessment.
Document A471 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 frequency limit for A471?
A471 is limited to four complex re-assessments per patient per physician within a 12-month period.
Can A471 be billed for virtual assessments?
Yes, A471 can be billed for virtual consultations provided they meet all other requirements.
What makes a respiratory case eligible for billing under A471?
Eligibility arises from conditions like severe uncontrolled asthma requiring recurrent and detailed reassessments.
How should a re-assessment of progressive interstitial lung disease be documented?
Document detailed respiratory symptom progression, treatment adjustments, and response to therapy.
When should you select A471 over more general re-assessment codes?
When the patient's condition includes complex, serious factors needing significant reassessment.
What should be documented for a patient with severe asthma to justify A471?
Record the complexity of control issues, medication adjustments, and the consultation's time frames.
How does complexity influence the choice of billing code for repeated visits?
Complexity of the case mandates an in-depth re-assessment, justifying A471 over basic follow-ups.
What patient scenarios are suitable for billing A471?
Cases involving progressive conditions like interstitial lung disease or severe asthma that defies standard measures.
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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