1What Is the A624 OHIP Code?
The A624 billing code refers to a medical specific re-assessment used primarily in the field of clinical immunology and allergy. This service is billed when a patient requires a follow-up evaluation to monitor the effectiveness of a treatment or ongoing therapy, such as asthma control after a change in medication or assessing symptom response during an immunotherapy course.
In clinical practice, these re-assessments are crucial for adjusting treatment plans to optimize patient outcomes in allergy and immunology cases. These cases often require precise calibration of therapeutic approaches depending on how patients respond over time, making follow-up assessments essential.
Proper understanding and documentation are vital, as these services are often mistaken with initial assessments or complex purposes, potentially leading to misbilling.
2Related Codes
| Code | Name | Frequency | Description |
|---|---|---|---|
| A623 | Medical specific assessment | Governed by specialty listing rules | Used for initial medical specific assessments in clinical immunology. |
| C623 | Medical specific assessment | Governed by specialty listing rules | Applicable for hospital in-patient settings for initial assessments. |
| A621 | Complex medical specific re-assessment | Governed by specialty listing rules | Requires higher complexity in follow-up assessment for allergy and immunology. |
| C621 | Complex medical specific re-assessment | Governed by specialty listing rules | Used for complex re-assessments in hospital in-patient settings. |
3Eligibility Requirements
According to the OHIP Schedule of Benefits, the A624 code requires adherence to several eligibility criteria:
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The re-assessment must be initiated at a place other than the patient's home, following a prior assessment that established a treatment plan.
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A comprehensive history, excluding non-indicated examinations (e.g., breast, genital, or rectal), is mandatory. This includes evaluating the presenting complaint, family and past medical histories, social history, and a functional inquiry into all relevant systems.
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Physicians must record the start and end times of the re-assessment in the patient's permanent medical record; without this, the service is non-payable.
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A624 may be delivered virtually and billed under 'A624A' for video or telephone consultations.
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For hospital in-patients, the corresponding code 'C624' should be utilized.
4What Your Clinical Note Must Show
Ensure all re-assessment services are documented comprehensively with the following:
- Record the start and end times of the service.
- Document a full patient history and examination as required by the General Preamble.
- Indicate the patient's response to treatments or reason for follow-up.
- Ensure clear records of virtual delivery, if applicable.
5Weak vs. Strong Note Examples
The strong note succeeds because it documents the visit duration, thorough patient history, clear clinical findings, and follow-up plan, which are absent in the weak note.
Re-assessment for asthma. Adjusted medication. Office visit was short. No start or end time recorded.
Re-assessment completed for asthma management post medication change.
Total visit duration recorded from 2 PM to 2:30 PM.
Patient history reviewed: Significant improvements noted with current asthma control. No new symptoms reported.
Plan: Continue current medication regimen and review in 3 months unless symptoms worsen.
- Start and end times clearly documented.
- Comprehensive history and examination notes present.
- Clear follow-up plan mentioned.
