OHIP Billing Guide🩺 ServicePublished 2026
C311

C311 OHIP Billing Code: Enhance Patient Care with Complex Re-assessments

The C311 code allows physiatrists to conduct comprehensive re-assessments of complex in-patient cases, ensuring optimal treatment and discharge planning.

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

1What Is the C311 OHIP Code?

A complex medical specific re-assessment using code C311 is intended for patients hospitalized in non-emergency settings where the complexity, obscurity, or seriousness of the patient's condition necessitates a thorough re-assessment. These assessments are critical in situations where an admitted patient's progress has stalled, requiring the physiatrist to re-evaluate multiple factors like function, muscle tone, skin condition, bladder control, and the overall rehabilitation plan before finalizing discharge plans.

Given the detailed and intricate nature of these reassessments, they can often be missed in fast-paced clinical environments if initial assessments are overly relied upon to guide the patient's treatment without acknowledging changing conditions. Recognizing and billing for C311 ensures that the enhanced level of care and time commitment is accurately reflected and reimbursed.

2Related Codes

CodeNameFrequencyDescription
A313Medical specific assessmentAs needed within limits$86.40, used for initial specific assessments.
C313Medical specific assessmentAs needed within limits$86.40, used for specific assessments in hospital settings.
W314General re-assessment of patient in nursing homeAs needed$20.60, for reassessments in nursing home settings.
A310Medical specific re-assessmentAs needed within limits$75.90, for non-complex reassessments.

3Eligibility Requirements

The C311 code is specifically applicable for non-emergency hospital in-patient services within the Physical Medicine & Rehabilitation specialty. Physicians can bill this code for in-depth reassessments due to the complexity of patient cases. It's important to note that the service may be carried out virtually via video, billed as C311A, but telephone assessments do not qualify.

To comply with OHIP regulations, complex medical-specific re-assessments are restricted to four per patient per physician per 12-month period, combining both complex and other specific assessments. Detailed time recording of the service start and end times is mandatory for the service to be reimbursable.

4What Your Clinical Note Must Show

1Mandatory Documentation for C311

Accurate documentation is a critical requirement for billing the C311 code.

  • The physician must document on the patient's medical record the start and end time of the service.
  • A comprehensive record detailing the reassessment findings including function, muscle tone, skin condition, bladder control, and recommendations for the rehabilitation plan is required.

5Weak vs. Strong Note Examples

The strong note provides a detailed account of the reassessment including specific observations, patient timelines, and follow-up actions, unlike the weak note, which lacks detail and specificity.

Weak Note

Reassessed patient. Adjusted rehabilitation plan.

Strong Note

Conducted complex re-assessment of hospitalized patient due to stalled recovery.

Evaluated functional and muscular tone, skin integrity, and bladder management.

Detailed the complete reassessment findings and outlined an updated, comprehensive rehabilitation plan.

  • Documented start time: 09:00
  • Documented end time: 11:30

6Common Reasons This Code Is Missed

1
Overlooking Complexity
Often, the precise complexity of a patient’s condition may be overlooked, leading to under-billing.
2
Insufficient Documentation
Failure to provide comprehensive documentation can result in audits and billing rejections.
3
Exceeding Frequency Limits
Exceeding the allowed number of assessments without adjusting the fee may lead to claim rejections.
Document C311 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 the C311 code?
The fee for the C311 code is CAD 82.75 as a flat rate for each complex medical re-assessment.
How often can I bill for the C311 code?
C311 can be billed up to four times per patient per physician within a 12-month period.
What conditions typically warrant a complex re-assessment in physiatry?
Conditions where recovery has stalled warrant a complex re-assessment, such as complex impairments in function and muscle tone.
How is a complex physiatry re-assessment different from a regular assessment?
A complex re-assessment involves evaluating stalled recovery across multiple areas, including rehabilitation planning and functional status.
What patient scenario might justify billing under C311?
For instance, if a hospitalized patient on a rehabilitation unit is not progressing as expected and requires a comprehensive review of their case.
Can C311 be billed for virtual assessments?
Yes, but only if the assessment is conducted via video; telephone assessments are not eligible.
What could trigger a re-assessment to be classified as complex?
A re-assessment could be classified as complex if the patient's condition is especially serious or obscure, requiring detailed evaluation.
When should a reassessment be considered necessary?
A reassessment is necessary if the patient's recovery is stagnant or if there are new compounding factors affecting treatment.
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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