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Billing code

E643A — Laser microlaryngoscopy add-on – benign disease

Laser microlaryngoscopy add-on

Add to Z323 when a laser is used with microlaryngoscopy to remove benign laryngeal lesions.

Watch for: Payable only with Z323, for benign disease, and E600 isn't payable with it.

Code

E643A

Description

Laser microlaryngoscopy add-on – benign disease

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Apr 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

Add-on to Z323 when a laser is used with microlaryngoscopy to remove benign laryngeal lesions.

What it covers

E643 is added to Z323 (direct laryngoscopy with removal of lesions) when a laser is used with microlaryngoscopy for benign disease (P7).

Billing rules

• Payable only with Z323 (P7).
• For benign disease only (P7).
• E600 (operating microscope) is not payable in addition to E643 (P7).

Often billed with

• Z323 direct laryngoscopy with removal of lesion(s) (P7).

Common rejections

• ADF: OHIP describes this as 'Corresponding procedure invalid, omitted or paid at zero': the add-on was billed without a paid Z323 on the same claim.
• ADH: OHIP describes this as 'Cannot be billed together': E600 with E643 (P7).

Related codes: Z323, E600, Z292, Z293

Source: Schedule of Benefits (July 1, 2026), Respiratory Surgical Procedures, Larynx, page P7.

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