E333 – Ossiculoplasty
OHIP Surgical Assists Code — Y. Ocular and Aural Surgical Procedures · Schedule of Benefits
Ossiculoplasty is a surgical procedure to reconstruct or repair the ossicular chain, which consists of the malleus, incus, and stapes in the middle ear. This procedure is typically performed to correct conductive hearing loss caused by damage or discontinuity of these bones. The fee is for the surgeon's service (suffix 'A'). Assistant (suffix 'B') and anaesthetist (suffix 'C') services are billed separately based on basic and time units defined in the Schedule of Benefits. See for base units and - for calculation details.
When to Use
- Use E333 for the surgical reconstruction or repair of the ossicular chain (malleus, incus, or stapes) to address conductive hearing loss.
- Select E333 when performing a tympanoplasty that specifically includes ossiculoplasty, provided the ossicular reconstruction is the primary or distinct surgical focus.
Common Pitfalls
- Billing E333 in conjunction with other middle ear procedures like Z913 (Myringoplasty) or E323 (Tympanoplasty) without ensuring the documentation clearly supports the distinct nature of the ossicular reconstruction to avoid 'unbundling' rejections.
- Failing to document the specific ossicles repaired, which is required to justify the use of E333 over simpler middle ear exploration codes.
Billing Tips
- Ensure the surgical assistant (suffix B) and anaesthetist (suffix C) are billed using the correct base units (6 and 10, respectively) plus time units, as these are not automatically calculated by the base fee of E333.
Effective: April 1, 2025
Y. Ocular and Aural Surgical Procedures
Y. Ocular and Aural Surgical Procedures
Surgical
Ocular and Aural Surgical Procedures
All insured services must be documented in appropriate records. The Act requires that the record establish that: 1. an insured service was provided; 2. the service for which the account is submitted is the service that was rendered; and 3. the service was medically necessary.
Assistant fee (suffix B) is based on 6 basic units plus time units. ()
Anaesthesia fee (suffix C) is based on 10 basic units plus time units. (, )
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