OHIP Billing Guide🩺 ServicePublished 2026
C035

C035 OHIP Billing Code: Essential General Surgery Consultation

The C035 code is billed by general surgeons for in-patient consultations in Ontario, assessing conditions like suspected appendicitis, diverticulitis, or bowel obstructions.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference114.75 CAD~3 min read

1What Is the C035 OHIP Code?

What is OHIP Billing Code C035?

The C035 code is utilized by general surgeons in Ontario for billing a consultation provided to a hospital in-patient. This code is applicable when a patient, often admitted with conditions such as suspected appendicitis, diverticulitis, bowel obstruction, or complications requiring surgical opinion, is evaluated.

An essential consideration with C035 is ensuring it is billed correctly in situations where frequent confusion arises — notably, this consultation cannot be claimed as an admission assessment unless it qualifies as the major pre-operative visit. For extended surgical evaluations, consider billing C935 instead. The out-patient equivalent to this service is A035.

2Related Codes

CodeNameFrequencyDescription
A935Special surgical consultationAs specifiedHigher complexity general surgery consult in out-patient settings.
C935Special surgical consultationAs specifiedHigher complexity general surgery consultation in hospital settings.
A035ConsultationAs specifiedEquivalent outpatient consultation for general surgery.
A036Repeat consultationAs specifiedFor subsequent consultations regarding same issue within the permitted period.

3Eligibility Requirements

Eligibility Requirements for C035

  • Frequency Limitations: C035 can be billed for the same patient, by the same physician, with the same diagnosis, once every two consecutive 12-month periods. An exception allows for two services within this period if the second service is after 12 months but before 24 months, given it is rendered in a hospital inpatient or emergency department context.
  • Unrelated Diagnoses: For clearly unrelated diagnoses, C035 may be billed once every 12 months.
  • Virtual Delivery: C035 may be rendered virtually via video and billed as C035A. Telephone consultations do not qualify under this code.
  • Certain Pre-operative Visits: When the consultation serves as the major pre-operative visit, it may be included within the surgical benefit. However, other hospital assessments may not be claimed unless they meet this criterion.

Note: Always verify specific patient scenarios against the Ontario Schedule of Benefits as policies may evolve.

4What Your Clinical Note Must Show

1Documentation Requirements for C035

Ensure the following details are captured in the patient’s medical record:

  • Patient identification and consent for consultation rendered
  • Detailed reason for consultation including presenting symptoms
  • Consultation findings and clinical decision-making process
  • Plan of care or recommendations given post-consultation
  • Record of discussion and any follow-up actions planned

5Weak vs. Strong Note Examples

The strong note succeeds by providing specific clinical findings, actions taken, and contextual details that support the consultation's necessity. The weak note lacks detail and documentation of clinical reasoning.

Weak Note

Patient referred with abdominal pain. Discussed options.

Strong Note

Patient with suspected appendicitis presented with severe right lower quadrant pain, nausea, and elevated white cell count.

Conducted a thorough physical examination, reviewed imaging results, and discussed potential surgical intervention, explaining possible outcomes and complications.

  • Diagnosis of suspected appendicitis confirmed by lab results.
  • Surgical consultation provided regarding procedure and risks.

6Common Reasons This Code Is Missed

1
Admission Assessment Confusion
Physicians often mistake admission assessments as billable under C035 without acknowledging the major pre-operative visit requirement.
2
Exceeding Frequency Limits
Overlooking the frequency cap of consultations can result in incorrect billing.
3
Virtual Code Misuse
Billing virtual consultations incorrectly by using phone services instead of video can lead to claim rejections.
Document C035 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 C035?
$114.75 as per the OHIP fee schedule.
Can C035 be billed for two consultations in one year?
Yes, if the consultations occur more than 12 but less than 24 months apart in a hospital or emergency setting.
What conditions typically warrant a C935 billing instead of C035?
Cases requiring a more comprehensive surgical evaluation such as complex abdominal tumour assessments.
When should a general surgeon use code A036 instead of C035?
For repeat consultations within the same diagnosis not eligible under the primary C035 due to frequency limits.
If a patient is referred from ER with a bowel obstruction, should I bill C035?
Yes, if the consultation involves in-hospital assessment for surgical intervention recommendations.
How should referrals for suspected appendicitis be billed?
If evaluated in-hospital, C035 applies. Documentation should support consultation necessity.
Is telephone consultation eligible for C035 billing?
No, C035 must be rendered via video for virtual eligibility.
Does a surgical opinion for a medical admission complication qualify under C035?
Certainly, if it's billed for an in-patient consultation under a related surgical issue.
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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