OHIP Billing Guide🩺 ServicePublished 2026
A311

A311 OHIP Billing Code: Managing Complex Physiatry Re-assessments

A311 allows physicians in Ontario to bill for complex medical specific re-assessments for conditions requiring detailed evaluation, like spinal cord injuries or complex amputations.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference82.75 CAD~3 min read

1What Is the A311 OHIP Code?

The A311 billing code is used for complex medical specific re-assessments particularly in the field of Physical Medicine and Rehabilitation. This typically involves patients who have conditions such as spinal cord injuries, acquired brain injuries, or complex amputations. These assessments focus on evaluating various dimensions of the condition, including functional ability, spasticity, required equipment, and any secondary complications that may arise.

Complex assessments are essential to manage patients whose conditions are multifaceted, requiring a comprehensive approach rather than a single-issue evaluation. As such, these assessments demand detailed attention due to the severity or obscurity of the patient’s condition, making them distinct from regular re-assessments.

2Related Codes

CodeNameFrequencyDescription
A311Complex medical specific re-assessmentLimited to 4 per 12 monthsFor complex conditions requiring detailed evaluation.
A313Medical specific assessmentLimited to 4 per 12 monthsCovers specific medical assessments in physiatry.
C313Medical specific assessmentLimited to 4 per 12 monthsSame service for in-patient cases.
W314General re-assessment of patient in nursing homeNo specific frequency mentioned.Re-assessment of nursing home patients.
A310Medical specific re-assessmentLimited to 4 per 12 monthsRe-assessment for less complex situations.

3Eligibility Requirements

OHIP Eligibility Requirements for A311

  • Complexity Requirement: The re-assessment must be due to the complexity, obscurity, or seriousness of the patient's condition and must include all elements of a medical specific re-assessment as outlined in the OHIP Schedule of Benefits.
  • Frequency Limit: Physicians are eligible to bill for up to four complex medical specific re-assessments per patient per 12 months. This cap includes any combination of medical specific assessments and re-assessments.
  • Time Documentation: Accurate time documentation is essential. Physicians must record both the start and end times of the service in the patient's permanent medical record.
  • Virtual Delivery: Re-assessments can be conducted virtually (telephone or video), and the virtual delivery should be billed as A311A.
  • In-Patient Equivalence: For hospital in-patient settings, the equivalent code is C311.

4What Your Clinical Note Must Show

1Time Documentation

Recording the service duration is mandatory for billing.

  • Start time must be noted in the patient's chart.
  • End time must also be recorded.
2Complexity Details

Document the condition's complexity, referencing specific factors such as obscurity or seriousness.

  • Detail any changes in patient’s functional status.
  • Record observations regarding spasticity and equipment needs.
  • Mention any secondary complications.

5Weak vs. Strong Note Examples

The strong note successfully conveys the complexity and specificity of the re-assessment by detailing functional changes, time stamps, and equipment adaptations, whereas the weak note lacks depth and precision.

Weak Note

Re-assessment conducted due to patient complaint. Discussed current treatment plan.

Strong Note

Conducted detailed re-assessment of patient's condition due to increased spasticity and potential secondary complications.

Evaluated changes in functional capacity and updated equipment requirements.

  • Start Time: 10:00 AM
  • End Time: 10:45 AM
  • Specific focus on handling spasticity and adapting AM care.

6Common Reasons This Code Is Missed

1
Insufficient Documentation
Failure to document start and end times or condition complexity results in non-payment.
2
Exceeding Frequency Limits
Billing more than four assessments per patient per year exceeds OHIP limits and may result in fee adjustments.
3
Overlooking Virtual Requirements
Neglecting to adapt documentation for virtual assessments can lead to claim denials.
Document A311 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 code A311?
The fee for A311 is CAD 82.75 per assessment.
How often can A311 be billed per patient?
A311 can be billed up to four times per patient per 12-month period.
What types of conditions warrant a complex re-assessment in physiatry?
Conditions like spinal cord injuries and complex amputations that involve multiple functional or mechanical complications.
How do I differentiate between A310 and A311 for billing?
A311 is used for complex cases needing comprehensive evaluation, whereas A310 is for less complex re-assessments.
Can A311 be billed for a patient seen in a nursing home?
Yes, but typically W314 would be the appropriate code unless the complexity requirements are met for A311.
Can A311 be used for virtual assessments?
Yes, A311 can be delivered virtually but must be billed as A311A.
What documentation is critical for complex physiatry assessments?
Detailed notes on functional status, condition complexity, start and end times, and any complications.
How should I document virtual re-assessments under A311?
Ensure time is documented and note the mode of virtual delivery (video or phone).
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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