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E865

E865Bilateral procedure add-on to M050

OHIP Surgical Assists Code · Schedule of Benefits

Bilateral procedure, to M050 (Frontal sinusotomy, extended, Draf II, unilateral)

When to Use

  • Use E865 when performing a Draf II extended frontal sinusotomy on both the left and right frontal sinuses during the same operative session as M050.
  • Use this code specifically when the surgical approach meets the criteria for an extended Draf II procedure bilaterally, rather than a standard Draf I (Z318) or the median Draf III (M052) approach.

Common Pitfalls

  • Billing E865 alongside M052 is a rejection risk, as M052 is inherently bilateral and represents a different surgical technique (median drainage).
  • Failing to link E865 to M050 on the same claim will result in a rejection, as E865 is strictly an add-on code dependent on the primary M050 procedure.
  • Attempting to bill E865 for a Draf I procedure is an audit risk; ensure the operative report clearly documents the extended Draf II criteria to justify the add-on.

Billing Tips

  • Always submit M050 and E865 on the same claim to ensure the bilateral status is recognized by the system.
  • If image guidance is utilized for the bilateral procedure, ensure E845 is included on the claim to capture the additional fee for distorted anatomy or proximity to critical structures.
Provider Fee$200.00

Effective: April 1, 2026

Service Type

Surgery

Code Classes

Procedure

Must be performed using an endoscopic approach.

Documentation of medical necessity for bilateral procedure.

M050 has 10 basic anaesthesia units; E865 does not add basic units but increases time units.

Assistant fee is not pre-set; use M400B if an assistant is required.

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