OHIP Billing Guide🩺 ServicePublished 2026
C163

C163 OHIP Billing Code: Medical Specific Assessment for Nephrology

C163 is a billing code for nephrologists providing a medical specific assessment to hospitalized patients with renal issues, such as acute kidney injury.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference95.95 CAD~3 min read

1What Is the C163 OHIP Code?

What is C163?

C163 is an OHIP billing code used by nephrologists for medical specific assessments of in-patients. This service involves a comprehensive evaluation of a patient's renal condition, typically addressing acute issues such as kidney injury or electrolyte disturbances.

The assessment requires obtaining a full history of the presenting complaint and conducting a detailed examination of the relevant area to make a diagnosis or assess function. This service ensures patients receive focused and specialized care from nephrology professionals.

It's crucial to document these assessments accurately, as improper documentation or coding can lead to incorrect billing and potential claims denial.

2Related Codes

CodeNameFrequencyDescription
A163Medical specific assessmentOne per patient per physician per 12-month periodSame service as C163 but for out-patient settings.
W164General re-assessment in nursing homeRe-assessmentAssessment for patients in nursing homes.
A161Complex medical specific re-assessmentComplex re-assessmentRe-assessment for complex cases.
A164Medical specific re-assessmentRe-assessmentFollow-up assessment in out-patient settings.

3Eligibility Requirements

Eligibility for C163

Setting: C163 is billed when a nephrologist provides a medical specific assessment to a hospitalized patient. It is applicable only in a non-emergency in-patient hospital setting.

Frequency: The assessment is limited to one per patient per physician per 12-month period unless:

  • A second assessment is provided for a distinctly different and unrelated diagnosis.
  • At least 90 days have passed since the last assessment, and the patient is being reassessed for a hospital admission.

Documentation: Detailed documentation, including start and end times of the service, must be recorded in the patient's permanent record.

4What Your Clinical Note Must Show

1Time Recording

Document the start and end time of the assessment.

  • Start time of the service
  • End time of the service
2Comprehensive Assessment

Include a full history and detailed examination of the relevant systems.

  • Full history of presenting complaint
  • Detailed examination of the affected area(s)

5Weak vs. Strong Note Examples

The strong note succeeds by providing specific details, including timing and a comprehensive examination, which enhances billing compliance.

Weak Note

Patient presented with renal issues. Assessment performed. Start and end times not documented.

Strong Note

Patient presented with acute kidney injury. A full history of the presenting complaint was taken, including medication history and previous renal events. The assessment included a detailed examination of renal function and electrolyte levels.

  • Assessment started at 10:00 AM and concluded at 11:00 AM
  • Relevant clinical findings and treatment plan documented

6Common Reasons This Code Is Missed

1
Incomplete Documentation
Failure to record start and end times can result in denied claims.
2
Exceeding Frequency Limits
Billing more than the allowed number of assessments without meeting exceptions can lead to penalties.
3
Misunderstanding Eligibility
Applying the code outside eligible settings or for non-qualifying conditions can result in a rejected claim.
Document C163 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 C163 code?
The fee for the C163 code under OHIP is CAD 95.95.
Can C163 be billed more than once a year for the same patient?
No, except when meeting specific exceptions, such as a different diagnosis or a second assessment post 90 days for a hospital admission.
What conditions typically warrant a C163 in nephrology?
Patients with acute kidney injury or severe electrolyte disturbances may require this assessment.
Can C163 be billed virtually?
Yes, C163 can be billed for video-only virtual assessments but not for telephone consultations.
In what scenario is C163 most commonly used in nephrology?
C163 is often used for in-patients with focused renal assessments, particularly for acute kidney issues.
What documentation is essential for C163 billing?
Document comprehensive history, examination details, and timing of the assessment in the patient's record.
Is C163 applicable for assessments in emergency settings?
No, C163 is for non-emergency, in-patient settings. Emergency assessments use different codes.
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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