OHIP Billing Guide🩺 ServicePublished 2026
A134

A134 OHIP Billing Code: Efficient Reassessments in Internal Medicine

A134 aids internal medicine specialists in efficiently billing for patient reassessments, optimizing follow-up care.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference72.00 CAD~3 min read

1What Is the A134 OHIP Code?

A134 refers to the 'Medical Specific Re-assessment' code within OHIP, used primarily by internal medicine specialists for follow-up visits. This code applies when a physician reassesses an ongoing issue, such as monitoring bloodwork results or evaluating the response to a prescribed treatment, rather than conducting an initial comprehensive diagnosis.

Reassessments are crucial when following through on treatment plans or evaluating changes in patient condition, providing an opportunity to adjust care plans based on updated clinical data. Because this code is often used for follow-up visits, it may be overlooked when physicians concentrate on primary assessments or complex reassessments, leading to missed billing opportunities.

2Related Codes

CodeNameFrequencyDescription
A133Medical specific assessmentPer eligibility rulesUsed for initial patient assessments in internal medicine.
C133Medical specific assessmentPer eligibility rulesFor initial assessments covered during in-patient care.
A131Complex medical specific re-assessmentPer eligibility rulesRe-assessment for more complex cases in an outpatient setting.
C131Complex medical specific re-assessmentPer eligibility rulesIn-patient complex re-assessment equivalent.

3Eligibility Requirements

To bill for A134, physicians must adhere to specific eligibility criteria set forth in the OHIP Schedule of Benefits:

  • Specialty Requirement: Limited to practitioners in Internal Medicine.
  • Service Context: Used specifically for re-assessments related to ongoing medical issues. Initial assessments should be billed under a different code.
  • Documentation: Physicians must note both the start and end times of the service in the patient's permanent medical record.
  • Virtual Visits: A134 may be billed for services delivered virtually as A134A. Ensure proper coding for telehealth sessions per Appendix J, Section 1 guidelines.
  • Hospital In-patient Context: Use the C134 code when the service is rendered to a hospital in-patient.

4What Your Clinical Note Must Show

1Time Documentation

Record the start and end times of the service on the patient's chart to ensure compliance.

  • Include both start and end or duration of reassessment.
2Patient Condition Details

Outline the medical issue being reassessed.

  • Description of ongoing or specific problems.
  • Tests reviewed or ordered.
3Virtual Care Documentation

Indicate if the service occurred virtually and document as A134A if applicable.

  • Mode of communication (video or phone).

5Weak vs. Strong Note Examples

The strong note succeeds due to its comprehensive overview, clear time documentation, and specific follow-up actions, while the weak note lacks detail on the reassessment specifics and time log.

Weak Note

Reviewed patient's blood sugar and advised on diet.

Strong Note

Reassessed patient's blood sugar management.

Ordered updated HbA1c test, adjusted medication dosage.

Documented start and end time: 14:00 to 14:20.

  • Reaffirmed importance of dietary adherence.
  • Follow-up scheduled in 3 months.

6Common Reasons This Code Is Missed

1
Omission in Time Documentation
Failure to document the specific start and end times in the patient's chart can lead to billing rejection.
2
Overlapping with Initial Assessments
Using A134 inappropriately for situations warranting initial assessments instead of follow-up evaluations.
3
Incomplete Patient Condition Details
Inadequate documentation of the medical issue being reassessed or steps taken can result in billing issues.
Document A134 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 A134?
The current fee for billing A134 is CAD 72.00 per service rendered.
How often can A134 be billed?
A134 can be billed according to specialty listing and general rules; refer to relevant limitations.
When should I choose A131 over A134?
Consider A131 for complex reassessments requiring significant diagnostic or evaluative effort beyond regular follow-up.
What scenarios typically warrant an A134 reassessment in internal medicine?
Routine follow-ups such as evaluating treatment response or investigating ongoing conditions like anemia warrant A134 reassessments.
How is A134 used for virtual consultations?
A134 services can be conducted virtually and billed as A134A, ensuring proper documentation of the telemedicine process.
What critical information must be documented for a reassessment?
Ensure documentation of start/end time, focus of reassessment, any reviewed tests, and changes in treatment plan.
Given a patient with chronic anemia, what assessments suit A134?
Follow-up on bloodwork results or new symptom developments in a known diagnosis of chronic anemia suits A134.
Does A134 apply if the reassessment concludes no change in treatment?
Yes, A134 still applies if it’s a medically required follow-up, even with no treatment changes, provided all documentation is thorough.
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.