OHIP Billing Guide🩺 ServicePublished 2026
A473

A473 OHIP Billing Code: Efficient Management of Respiratory Conditions

The A473 billing code covers medical specific assessments by respirologists, offering comprehensive evaluation for complex respiratory issues.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference102.60 CAD~3 min read

1What Is the A473 OHIP Code?

Definition and Clinical Context

The A473 billing code applies to medical specific assessments conducted by respirologists. This code is utilized when a complete history and detailed examination of the respiratory system are necessary to diagnose complex respiratory issues. Examples of typical usage include assessments related to chronic cough, abnormal chest films, or newly abnormal spirometry results.

Common Issues in Coding

Due to its specific criteria, accurately billing A473 can often be overlooked if thorough documentation or full assessments are not properly recorded. Ensuring comprehensive notes and adherence to eligibility criteria are crucial to avoid billing errors with this code.

2Related Codes

CodeNameFrequencyDescription
C473C473 Medical specific assessmentOnce or twice per 12 months per criteriaEquivalent assessment for hospital in-patients.
A471A471 Complex medical specific re-assessmentVariable as per case complexityUsed for complex re-assessment scenarios.
A474A474 Medical specific re-assessmentVariable as per case complexityUsed for follow-up medical specific re-assessments.
C471C471 Complex medical specific re-assessmentVariable as per case complexityComplex re-assessment for in-patient scenarios.

3Eligibility Requirements

Eligibility Requirements

According to the OHIP Schedule of Benefits, a specific assessment requires:

  • Conducting the service outside the patient's home.
  • A full history of the presenting complaint.
  • A detailed examination necessary for diagnosis, exclusion of disease, or functional assessment.

Frequency Limitations

  • Once per year limit: Each patient can receive only one specific assessment per physician every 12 months.
  • Twice per year exceptions: This may increase to two if there is a clearly different, unrelated diagnosis or if 90 days have elapsed following the last assessment and the second is a hospital admission assessment.

Note: Proper documentation of time spent during the service is mandatory.

4What Your Clinical Note Must Show

1Minimum Time Recording

Documentation must include the start and end times of the service within the patient's permanent medical record.

  • Start time
  • End time

5Weak vs. Strong Note Examples

The strong note includes comprehensive details and organizes essential information, ensuring billing criteria are met, whereas the weak note lacks specificity and completeness.

Weak Note

Patient presented with breathing issues. Exam conducted. Diagnosis pending further tests.

Strong Note

Patient referred with chronic cough. Full history was taken, revealing a 6-month duration with progressive symptoms. Comprehensive respiratory examination conducted, focusing on lung function, and abnormal spirometry results analyzed. Initial diagnosis of potential COPD considered, need for further tests identified.

  • Complete history and demographics
  • Detailed examination findings
  • Initial diagnosis considerations
  • Plan for further testing or follow-up

6Common Reasons This Code Is Missed

1
Incomplete Documentation
Lack of thorough notes on the history and examination specifics can lead to a missed billing opportunity for A473.
2
Eligibility Misunderstanding
Failing to confirm criteria such as different diagnosis or a 90-day gap for second assessments can cause improper billing.
3
Time Recording Errors
Not recording the precise time spent during assessment as required by OHIP leads to claims rejection.
Document A473 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 the A473 service?
The A473 service fee is CAD 102.60, and it can be billed for eligible medical specific assessments by respirologists.
Can A473 be billed more than once a year per patient?
Yes, it can be billed twice if there's an unrelated diagnosis or 90 days have elapsed and it's a hospital admission assessment.
What patients typically receive an A473 service?
Patients referred for chronic cough, abnormal chest films, or new spirometry abnormalities are typical cases.
When might a respirologist opt for a complex re-assessment code instead?
A complex re-assessment may be used when prior assessment found complex respiratory issues needing detailed follow-up or a change in treatment strategy.
What clinical factors necessitate using A473 over simpler codes?
Significant clinical evaluation such as detailed examination for potential COPD or asthma after unusual spirometry demands the A473.
How is service provided virtually using A473 coded?
Virtual services are billed as A473A with the same fee, provided they meet all required eligibility criteria.
How does a referral from a general practitioner for abnormal spirometry results fit A473?
A referral for abnormal spirometry fits under A473 if it leads to a comprehensive respiratory assessment documenting the presenting issue and diagnosis.
Are referrals from Emergency Departments eligible for billing A473?
Yes, particularly if they require detailed respiratory evaluation such as unexplained respiratory distress or abnormal testing results.
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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