OHIP Billing Guide🩺 ServicePublished 2026
A611

A611 OHIP Billing Code: Optimize Hematology Patient Care with Complex Re-assessment

A611 allows hematologists to bill for complex medical specific re-assessments, catering to patients with intricate conditions requiring detailed follow-ups.

For Ontario Physicians & Billing StaffOHIP Schedule of Benefits Reference83.40 CAD~3 min read

1What Is the A611 OHIP Code?

A611 is a billing code for complex medical specific re-assessments in hematology under OHIP. This code is typically used when managing patients with complex conditions such as myeloproliferative or lymphoproliferative disorders, those who are transfusion-dependent, or patients requiring intricate anticoagulation management due to both thrombosis and bleeding risks. These situations demand thorough re-assessment due to the complexity and seriousness of the patient's condition, which is above and beyond a standard medical re-assessment.

The code is frequently missed due to underestimating the need for reassessment in these complex cases or inadequate documentation of the time spent on the assessment. Accurate timekeeping and understanding the qualifying conditions are critical to billing this code effectively.

2Related Codes

CodeNameFrequencyDescription
A613Medical specific assessmentUnlimited per yearFor medical-specific assessments in hematology.
C613Medical specific assessment - In-PatientUnlimited per yearIn-patient medical-specific assessment under OHIP.
A614Medical specific re-assessmentPer general guidelinesRe-assessments without the complexity factor, where applicable.
C611Complex medical specific re-assessment - In-PatientLimited to 4 times per yearSimilar to A611, but for in-patient services.

3Eligibility Requirements

To be eligible for billing A611, the re-assessment must address the complexity, obscurity, or seriousness of a patient's condition. All the requirements of a medical-specific re-assessment are also included. According to the OHIP Schedule of Benefits, complex medical specific re-assessments are limited to four per patient per physician per year. Accurate documentation of the start and end times of the assessment on the patient's medical record is mandatory as per General Preamble GP7. Furthermore, A611 can be delivered virtually and billed as A611A.

4What Your Clinical Note Must Show

1Documentation Essentials

Ensure accurate billing by adhering to documentation requirements:

  • Record the start and end times of the service on the patient's medical chart.
  • Include a comprehensive description of the complexity or seriousness of the patient's condition justifying the use of A611.
  • Ensure documentation supports the need for a complex re-assessment, distinct from a standard assessment.

5Weak vs. Strong Note Examples

The strong note succeeds by comprehensively detailing the clinical context and time requirements, justifying the use of A611 due to the complexity of care, whereas the weak note lacks detail and does not meet the documentation standards.

Weak Note

Reviewed the patient with ongoing myeloproliferative disorder. Discussed treatment.

End time: 2:15 PM.

Strong Note

The patient with a diagnosed myeloproliferative disorder was re-assessed due to recent escalation in symptoms.

Discussed patient's transfusion requirements and reassessed anticoagulation strategy owing to new thrombosis and bleeding complications.

Start time: 1:30 PM, End time: 2:15 PM.

  • Clearly documented assessment of complex conditions.
  • Included start and end times for billing compliance.
  • Detailed plan addressing both thrombosis and bleeding risk.

6Common Reasons This Code Is Missed

1
Inadequate Documentation
Failure to record the start and end times or adequately describe the complexity of the case.
2
Misunderstanding the Code Limitations
Billing more than four re-assessments per patient per year without considering the restrictions.
3
Complexity Underestimated
Physicians often miss billing for A611 by not recognizing cases as complex when they meet the criteria.
Document A611 correctly — every time
Empathia's templates automatically structure your notes to capture every required element for audit-proof billing.

8Frequently Asked Questions

How many times per year can A611 be billed for a patient?
A611 can be billed up to four times per patient per year per physician.
Can A611 be billed for virtual consultations?
Yes, A611 can be billed as A611A for eligible virtual care services.
What conditions might qualify as complex in hematology?
Conditions like myeloproliferative disorders or intricate anticoagulation needs.
Is complex anticoagulation management eligible for A611 billing?
Yes, if the patient requires complex management due to concurrent thrombosis and bleeding risks.
What kinds of patients benefit from these complex re-assessments?
Patients with transfusion dependency or complex disorders requiring regular reassessment.
In what scenario would you not bill A611, opting for another code?
In less complex cases, where only a standard re-assessment suffices, consider A614 instead.
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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