OHIP Billing Guide🩺 ServicePublished 2026
C093

C093 OHIP Billing Code: Essential Cardiac Surgery Assessment

C093 is an OHIP billing code for specific assessments focused on cardiac surgery in non-emergency hospital in-patient settings.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference55.70 CAD~3 min read

1What Is the C093 OHIP Code?

C093 is a specific assessment billing code under OHIP for cardiac surgical evaluations of hospital in-patients. This service is provided by cardiac specialists and requires a comprehensive examination related to cardiac conditions such as sternal wound concerns post-surgery, new murmurs in patients with prosthetic valves, or assessments for pericardial collections.

This code is critical for surgeons to make accurate diagnoses, evaluate the necessity for further surgical interventions, and ensure optimal patient care. An oversight in billing could occur if the assessment is mistaken for general consultations or if documentation fails to reflect the specificity required for this comprehensive cardiac evaluation.

2Related Codes

CodeNameFrequencyDescription
A093Specific assessmentOne per patient per physician per 12 monthsOut-patient equivalent for specific assessments in cardiac surgery.
C094Specific re-assessmentOne per patient per physician per 12 monthsRe-assessment for ongoing cardiac surgical concerns.
A094Partial assessmentAs neededAssessment with a less comprehensive scope in cardiac surgery.
A935Special surgical consultationAs clinically requiredComprehensive consultation for complex cardiac surgical cases.

3Eligibility Requirements

The C093 code can be used when performing a specific assessment within a non-emergency hospital in-patient setting. Specialists in cardiac surgery conduct this examination to address precise cardiac issues. According to OHIP guidelines, the frequency of specific assessments is limited to one per patient, per physician, within a twelve-month period. Exceptions to this limit permit a second assessment in cases with a distinctly different diagnosis unconnected to the initial assessment, or if at least 90 days have passed and the assessment involves a hospital admission.

For virtual care services, C093 is only eligible when conducted via video, and not through telephone consultations.

4What Your Clinical Note Must Show

1Documentation Requirements

Specific assessment must include a thorough record of:

  • Start and end time of the service.
  • Full history of the presenting cardiac complaint.
  • Detailed examination of relevant cardiac areas to establish a diagnosis or assess function.

5Weak vs. Strong Note Examples

The strong note provides a detailed clinical picture and records specific actions taken related to cardiac surgery concerns, while the weak note lacks detail and misses critical assessment components.

Weak Note

Patient presented with chest pain. Assessed general health and reviewed medical history. No major issues noted.

Strong Note

Conducted a detailed assessment on patient with a post-surgical sternal wound concern. Reviewed detailed history of the cardiac procedure and conducted a thorough examination of sternal area.

Confirmed assessment to evaluate for potential infection with differential diagnosis considerations. Noted plan to monitor wound progression and scheduled follow-up review.

  • Documented time: 10:00 - 10:45.
  • Comprehensive examination of the sternal wound area included.

6Common Reasons This Code Is Missed

1
Inadequate Documentation
Insufficient detail in medical records can lead to rejections or adjustments to a less specific code.
2
Frequency Limitations Overlooked
Conducting more than one assessment without meeting exceptions can result in an adjusted fee.
3
Improper Setting
Billing for ineligible settings, such as emergency department cases, can invalidate claims under C093.
Document C093 correctly — every time
Empathia's templates automatically structure your notes to capture every required element for audit-proof billing.

8Frequently Asked Questions

How often can C093 be billed per patient per year?
C093 can be billed once per patient per physician per 12-month period, with a potential increase to two under specific conditions.
What diagnoses typically require C093 billing in cardiac surgery?
Common cases include a sternal wound assessment post-bypass, new murmurs with prosthetic valves, or evaluation of pericardial collections.
Can C093 be billed for virtual assessments?
Yes, but only if conducted via video. Telephone consultations do not qualify under the C093 code.
What warrants a specific assessment in cardiac surgery?
Conditions like post-operative concerns, new cardiac symptoms, or specific function assessments warrant this code.
What setting is required to bill C093?
C093 is billed for specific assessments conducted in non-emergency hospital in-patient settings.
Why might a patient return for a second assessment within a year?
A second distinct, unrelated diagnosis or a significant time lapse followed by a new hospital admission may necessitate a second C093 billing.
What happens if C093 is billed without proper documentation?
Claims may be denied or down-coded to a lesser assessment fee due to insufficient detail or incorrect service reporting.
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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