OHIP Billing Guide🩺 ServicePublished 2026
C235

C235 OHIP Billing Code: Ophthalmology Consultation Guide

C235 is billed by ophthalmologists for in-patient consultations within a hospital setting under specific conditions. Detailed requirements ensure accurate billing.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference85.95 CAD~3 min read

1What Is the C235 OHIP Code?

What is C235?

C235 is an OHIP billing code used by ophthalmologists for consultations conducted in a non-emergency, hospital in-patient setting. It applies typically when assessing complex ophthalmic cases such as acute visual loss, suspected endogenous endophthalmitis, or ocular involvement in systemic diseases.

This code is crucial for ensuring proper compensation for comprehensive ophthalmic evaluations where in-depth analysis and expertise are needed. It’s important for physicians to accurately document these consultations to meet OHIP’s billing requirements.

2Related Codes

CodeNameFrequencyDescription
A935Special surgical consultationAs per Ophthalmology listingsAdvanced surgical consultations under Ophthalmology.
C935Special surgical consultationAs per Ophthalmology listingsAdvanced surgical consultations for inpatients.
A231Neuro-ophthalmology consultationAs per Ophthalmology listingsConsultation that involves neurological consideration of ocular issues.
A235ConsultationEquivalent outpatient serviceConsultation services rendered outside hospital in-patient settings.

3Eligibility Requirements

C235 Eligibility Requirements

  • Setting: C235 is used for consultations in non-emergency hospital in-patient services.
  • Request Documentation: A written request from a referring physician, nurse practitioner, or dental surgeon is mandatory. It must identify the consultant and the referring entity by name and include the patient’s details and OHIP health number.
  • Frequency: One consultation per two consecutive 12-month periods per patient, per diagnosis. A second service can be billed if the consultation is for a hospital inpatient or patient in an Emergency Department, rendered more than 12 but less than 24 months after the first.
  • Unrelated Diagnosis: When clearly defined and unrelated, one service may be billed per 12-month period.

Failure to meet these conditions may result in reduced compensation.

4What Your Clinical Note Must Show

1Consultation Documentation Requirements

Ensure these items are included in the medical record to support billing C235.

  • Written request for consultation with consultant, referring physician, NP, or dental surgeon’s details.
  • Patient’s full name and OHIP health number.
  • The specific services requested and relevant clinical information.
  • A copy of the written consultation report furnished to the referring party.
  • Times when the service started and ended recorded on the patient's chart.

5Weak vs. Strong Note Examples

The strong note succeeds by providing specific details including the referrer's name, patient's name and health number, explicit reason for referral, examination details, recorded duration, and confirmation of a written report. The weak note lacks these critical details.

Weak Note

Referred by Dr. Smith for examination. Exam conducted; assessment notes to follow.

Strong Note

Consultation requested by Dr. John Doe at Hospital X.

Patient: Jane Doe, OHIP#: 1234567890.

Purpose: Suspected endophthalmitis following surgery — detailed assessment and written recommendations needed.

Consultation included complete ocular examination and B-scan ultrasound.

  • Time: Service began at 2:00 PM and concluded at 2:45 PM.
  • Report: A full consultation report was sent back to Dr. John Doe.

6Common Reasons This Code Is Missed

1
Absence of Written Request
Consultations should be preceded by a documented request; otherwise, they're not payable as consultations.
2
Diagnosis Repetition
Billing more than the allowed frequency for the same diagnosis without proper eligibility can lead to denial.
3
Incomplete Time Records
Lack of recorded start and end times can result in non-payment.
Document C235 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 C235 under OHIP?
The fee for C235 services is CAD 85.95.
How often can C235 be billed for the same diagnosis?
Typically, one service per two consecutive 12-month periods unless specific conditions are met for an additional claim.
What kind of cases qualify for C235 consultations in ophthalmology?
Cases like acute visual loss or suspected endogenous endophthalmitis in hospital in-patients are examples.
Does C235 cover consultations for unrelated diagnoses?
Yes, one service every 12 months is permissible for clearly unrelated diagnoses.
Can C235 be billed virtually?
Yes, but it must comply with the 'VIDEO ONLY' requirement, billed as C235A.
What should a referring physician include in the consultation request?
The consultant's name and specialty, patient details, and specifics of the service required should be included.
In what setting is C235 primarily used?
C235 is used for non-emergency hospital in-patient consultations.
Can C235 be billed for follow-up care after a consultation?
Follow-up care does not qualify as a consultation unless a new, separate referral is provided for a different diagnosis.
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.
@2026 Empathia AI, Inc. All rights reserved.