OHIP Billing Guide🩺 ServicePublished 2026
C680

C680 OHIP Billing Code: Comprehensive Initial Assessment for Substance Abuse

C680 covers the initial in-patient assessment for substance abuse disorders, primarily billed by family physicians in Ontario.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference164.95 CAD~3 min read

1What Is the C680 OHIP Code?

The C680 billing code pertains to the initial assessment of substance abuse conducted by physicians, primarily in a hospital in-patient setting. It is designed for situations where a patient is admitted due to withdrawal, overdose, or other medical complications arising from substance use. This comprehensive assessment sets up treatment plans before discharge.

It's important for physicians to note that this code is subject to the same conditions as A680, including the once-per-patient-per-practice-group rule within a 12-month period. One common oversight is not recognizing that C680 cannot be billed if an A680 assessment was conducted by the same physician or practice group within the last year. Additionally, assessments related to smoking cessation are not eligible under this code.

2Related Codes

CodeNameFrequencyDescription
A680'A680 Initial assessment - substance abuse'Once per patient per physician or group every 12 monthsEquivalent service outside of hospital in-patient settings.
A914'A914 GP focused practice comprehensive consultation by Video'For comprehensive virtual consultationsEnables focused practice consultations through video for general practice.
A006'A006 Repeat consultation'Multiple use, per assessment needsFollow-up consultations.
A010'A010 GP focused practice consultation by Video'Can be billed per consultationNon-comprehensive general practice consultations done via video.

3Eligibility Requirements

Eligibility

  • Frequency Limit: C680 is limited to once per patient per physician or practice group within a 12-month period, unless an exception applies where more than 12 months have passed since the last service.
  • Exclusion: The assessment cannot be billed for substance abuse in relation to smoking cessation. For services related to smoking cessation, refer to codes like A957, K039, and E079.
  • Practice Group Definition: Practice group refers to physicians within the same billing group or those co-located with shared access to patient medical records.
  • Virtual Care: C680 can be conducted virtually but must be performed via video (C680A); telephone consultations are not eligible.
  • Time Calculation: Excludes time dedicated to other billable services or non-patient-facing activities like reviewing documentation.

4What Your Clinical Note Must Show

1Required Documentation for C680 Billing

Ensure the following details are accurately documented in the patient's medical record:

  • Patient's medical history and details leading to the in-patient admission.
  • Comprehensive substance use assessment and findings.
  • Treatment plan formulated during the initial assessment.
  • Documentation of any co-existing medical complications or conditions.

5Weak vs. Strong Note Examples

The strong note provides a detailed clinical picture, outlines the assessment process, and proposes a treatment plan, while the weak note lacks specifics necessary for billing justification.

Weak Note

Patient admitted for substance use. Initial assessment done.

Strong Note

53-year-old male admitted for opioid overdose complicated by pneumonia. Initial comprehensive assessment conducted covering history of substance use, previous treatments, and psychological assessment. Developed treatment plan focusing on pharmacotherapy and behavioral interventions. Collaboration with in-patient care team for safe discharge planning.

  • Documented specific substances used and frequency.
  • Included relevant psychosocial factors impacting patient's substance use.

6Common Reasons This Code Is Missed

1
Duplicate Billing
Billing C680 without recognizing an A680 was billed within the last 12 months.
2
Smoking Cessation Misbilling
Attempting to bill for smoking cessation under C680 instead of appropriate codes.
3
Incorrect Virtual Billing
Billing for telephone consultations, which are not covered under virtual care for C680.
Document C680 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 C680?
The C680 code carries a fee of CAD 164.95.
How often can C680 be billed for a patient?
C680 can be billed once per year per patient per physician or practice group.
Can C680 be billed for smoking cessation?
No, assessments related to smoking cessation should use other specific codes.
Who is eligible to conduct and bill the C680 assessment?
Family physicians in a hospital in-patient setting typically conduct this assessment.
What patient scenarios typically necessitate a C680 assessment?
Patients admitted for withdrawal, overdose, or complications from substance use are typical candidates.
Can C680 be billed if the patient has seen another physician in the same group?
No, it can only be billed once per group per year unless a 12-month gap exists.
Is C680 eligible for video consultation billing?
Yes, but only via a video consultation (C680A), not telephone.
What documentation is needed for C680 billing?
Complete documentation of patient's medical history, substance use evaluation, and treatment plan is required.
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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