OHIP Billing Guide🩺 ServicePublished 2026
C155

C155 OHIP Billing Code: Streamlined Endocrinology In-Patient Consultations

The C155 code allows endocrinologists to bill for in-patient consultations addressing complex issues like glycaemic control and electrolyte imbalances in Ontario.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference172.95 CAD~4 min read

1What Is the C155 OHIP Code?

C155 is an OHIP billing code designated for consultations provided by endocrinologists to hospital in-patients. This consultation typically involves evaluating complex metabolic or endocrinological conditions requiring specialist knowledge. Common scenarios include in-patient glycaemic management, hyponatraemia, hypercalcaemia, and managing steroid use during hospital admissions.

Consultations must follow a written request from a referring physician, nurse practitioner, or dental surgeon, emphasizing the need for an expert opinion. It encompasses a thorough assessment and culminates in a detailed report shared with the referrer. This billing code is crucial in the efficient management of intricate endocrine disorders, ensuring specialists are remunerated for their expert evaluations. Despite its importance, practitioners may miss billing due to oversight of eligibility criteria or documentation requirements.

2Related Codes

CodeNameFrequencyDescription
A150Comprehensive endocrinology consultationService per distinct patient and case needsCovers a broader assessment for more complex endocrinology cases.
A155ConsultationFlexible with equivalent settings for out-patientEquivalent service for non-in-patient consultations.
A156Repeat consultationAs needed for ongoing case engagementFor additional insight or follow-up within the same care period.
A255Limited consultationSpecific cases requiring limited reviewReserved for more straightforward endocrinology consults.

3Eligibility Requirements

To bill with code C155, adhere to these eligibility requirements:

  1. Referral Requirements: The service must be requested in writing by a referring physician, nurse practitioner, or dental surgeon due to case complexity or for a second opinion.

  2. Documentation: Retain a copy of the written referral within the consultant's medical records, detailing the referring health professional’s name, billing number, and the patient’s name and health number.

  3. Hospital Consultations: Specifically for endo-inpatient settings and may be rendered virtually as C155A via video only.

  4. Frequency: One consultation per two consecutive 12-month periods for the same patient and diagnosis, with exceptions allowing a second service under specific conditions as outlined in the service description.

A failure to meet these conditions may result in the service being reimbursed at a lower assessment fee.

4What Your Clinical Note Must Show

1Written Request Documentation

Ensure the written request is present in the patient’s medical record.

  • Include the referring physician, nurse practitioner, or dental surgeon's name and billing number.
  • Clearly state the need for consultation due to complexity or second opinion.
2Consultation Report

Prepare a complete consultation report to send back to the referrer.

  • Include findings, opinions, and recommendations.
  • The report should address the specific issues raised in the referral.
3Service Timing

Record precise start and end times for the consultation in the patient's record.

5Weak vs. Strong Note Examples

The strong note provides a detailed consultation context, referring physician information, and specific recommendations, while the weak note lacks comprehensive assessment details and lacks a follow-up plan.

Weak Note

Consulted on patient's hypercalcaemia.

Advised to monitor levels.

Strong Note

Consultation requested by Dr. Smith to address patient's complex hypercalcaemia.

In-depth assessment conducted on current management and calcium levels.

  • Recommended adjusting steroid therapy.
  • Provided detailed report to Dr. Smith with specific next steps and follow-up plan.

6Common Reasons This Code Is Missed

1
Lack of Written Referral
Not securing or documenting the necessary written request for consultation.
2
Incorrect Billing for Virtual Services
Attempting to bill for virtual services conducted via telephone rather than eligible video platforms.
3
Insufficient Documentation
Failing to record necessary consultation details, such as start and end times, leading to reduced reimbursement.
4
Misinterpretation of Frequency Limits
Billing more than once per frequency period without understanding eligibility exceptions causes claim rejections.
Document C155 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 code C155?
The standard fee for C155 is CAD 172.95.
When can C155 be billed more than once in a year?
C155 can be billed a second time within two consecutive years if rendered to a hospital inpatient or in an Emergency Department more than 12 but less than 24 months after the first consultation.
What kind of endocrinology cases are suited for C155 billing?
Common cases include inpatient glycaemic control, hyponatraemia, hypercalcaemia, or steroid management issues requiring specialized assessment.
Can consultations for diabetes management qualify for C155?
Yes, if the case involves complexities that require specialist input beyond routine management, making it appropriate for C155.
Under what conditions can a C155 consultation be conducted virtually?
C155 may be billed as C155A if the consultation is conducted through video communication, as phone consultations are not covered.
How should referrals from ER nurses be managed for C155 billing?
Ensure a formal referral note is provided by the ER's attending physician or nurse practitioner to qualify for C155 billing.
What should be documented for successful C155 billing?
Include a detailed report of the consultation’s findings, recommendations, and the timing of service along with the referring professional’s information.
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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