OHIP Billing Guide🩺 ServicePublished 2026
C511

C511 OHIP Billing Code: Essential for Complex Physiatry Assessments

C511 is billed by physiatrists for complex assessments of in-patient conditions such as traumatic brain injuries, strokes, or spinal cord injuries.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference114.80 CAD~3 min read

1What Is the C511 OHIP Code?

What is C511?

C511 is the OHIP billing code used for complex physiatry assessments conducted on hospital in-patients. These assessments are crucial in managing complicated cases such as traumatic brain injuries, strokes, and spinal cord injuries. Physiatrists perform these assessments to determine appropriate treatment plans, including potential in-patient rehabilitation program admission.

Typically, these assessments involve a comprehensive review of the patient's medical history, current condition, and potential rehabilitation needs. Due to the complexity of the conditions involved, this code requires a detailed and thoughtful approach, often incorporating multi-disciplinary consultations.

Commonly, this code is missed when the required elements of a specific medical re-assessment are not thoroughly documented, or when the clinical needs of the patient do not align with the complexity criteria set forth by OHIP.

2Related Codes

CodeNameFrequencyDescription
A511Complex physiatry assessmentSubject to same conditions as C511For the same service rendered outside hospital in-patient settings.
A315ConsultationAs per Schedule of Benefits rulesInitial consultation in the Physical Medicine & Rehabilitation specialty.
A316Repeat consultationAs per Schedule of Benefits rulesFollow-up consultation in the Physical Medicine & Rehabilitation specialty.
A425Comprehensive physical medicine and rehabilitation consultationAs per Schedule of Benefits rulesComprehensive in-depth consultation requiring extended evaluation.

3Eligibility Requirements

C511 Eligibility Requirements

  • Specific Conditions: C511 is applicable for assessments related to traumatic brain injury, strokes (hemorrhagic and ischemic), or spinal cord injuries.
  • In-Patient Setting: This code is specifically for non-emergency hospital in-patient services under the Physical Medicine & Rehabilitation (31) listing.
  • Billing Frequency: A maximum of 6 C511 assessments can be billed per patient, per physician, per 12-month period. Assessments beyond this limit will be downgraded to a lesser fee.
  • Requisite Documentation: The assessment must include elements of a medical specific re-assessment. Failure to document appropriately will result in a lower fee being paid.
  • Virtual Care: C511 may be billed as C511A if delivered via video. Telephone assessments are not eligible under this code.
  • Concurrent Billing Restrictions: E078 is not eligible for payment alongside C511.

4What Your Clinical Note Must Show

1Documentation Essentials

C511 services require strict documentation for OHIP compliance.

  • Record the start and end time of the service in the patient's medical record.
  • Ensure all elements of a medical specific re-assessment are documented.
  • Clear documentation of patient's condition aligning with traumatic brain injury, stroke, or spinal cord injury is necessary.

5Weak vs. Strong Note Examples

The strong note succeeds by providing a detailed account of the assessment process, including interdisciplinary coordination and specifics of the patient's condition, whereas the weak note lacks specificity and depth.

Weak Note

Patient assessed for rehabilitation potential. Acute stroke mentioned. Plan discussed.

Strong Note

Comprehensive assessment conducted for acute ischemic stroke. Detailed medical history reviewed, current neurological deficits evaluated. Rehabilitation potential assessed. Discussion held with interdisciplinary team including neurology and nursing for coordinated care.

  • Detailed history and evaluation of stroke impact
  • Multi-disciplinary team coordination
  • Specific rehabilitation discussion points

6Common Reasons This Code Is Missed

1
Inadequate Documentation
Failure to thoroughly document each element of the assessment can lead to claim rejections or adjustments.
2
Incorrect Coding for Setting
Using C511 for out-patient assessments instead of the appropriate A511 code.
3
Overlooking Frequency Limits
Billing beyond the 6-assessment limit per year without proper justification results in decreased payments.
Document C511 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 C511?
The fee for C511 complex physiatry assessment is CAD 114.80.
How many times can C511 be billed per year?
C511 can be billed up to 6 times per patient, per physician, within a 12-month period.
Is C511 applicable for assessing mild traumatic brain injuries?
No, C511 is intended for complex cases like acute traumatic brain injuries requiring significant rehabilitation planning.
Can C511 be used for stroke follow-ups?
Yes, if the stroke is complex enough to require a detailed physiatry assessment.
For which patient scenarios is C511 most appropriate?
C511 is suitable for in-patients with complex conditions like acute ischemic stroke or traumatic brain injury needing rehab evaluation.
How does a traumatic spinal cord injury affect C511 eligibility?
Patients with complex spinal cord injuries where ongoing physiatry management is required can be assessed using C511.
What documentation is critical for successful C511 billing?
Ensure start and end times, specific re-assessment elements, and detailed condition-related notes are recorded.
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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