Z150 – Other areas - General anaesthetic - two lesions
OHIP Psychiatric Code — INTEGUMENTARY SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Other areas - General anaesthetic - two lesions. As a surgical procedure, it includes the common elements of insured services as described in the Schedule on pages -. Specific elements for surgical assistants and anaesthesiologists are detailed on pages and respectively.
When to Use
- Use Z150 when performing the excision or treatment of exactly two distinct lesions under general anaesthetic in 'other' (non-specified) anatomical areas.
- Select Z150 when the procedure is performed in a hospital setting where general anaesthesia is required, distinguishing it from local anaesthetic codes like Z151.
Common Pitfalls
- Billing Z150 for a single lesion; this code specifically requires two lesions to be treated to be eligible for the fee.
- Attempting to bill Z150 in conjunction with other excision codes for the same anatomical site, which often triggers a 'duplicate service' rejection or requires a manual override for distinct sites.
- Failing to document the specific anatomical locations of both lesions, which is required to justify the 'two lesions' billing criteria during an audit.
Billing Tips
- Ensure the operative report explicitly states that general anaesthesia was utilized, as this is a mandatory requirement for the Z150 fee structure.
- If treating more than two lesions, Z150 is not the appropriate code; you must use the specific codes for multiple lesions or the appropriate 'each additional' codes as defined in the Schedule.
Effective: April 1, 2026
M. Integumentary System Surgical Procedures
INTEGUMENTARY SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
For those procedures prefixed with a “Z” by a surgical specialist who has assessed the patient prior to admission in respect of the same illness, admission assessments are deemed to be a specific re-assessment or medical specific re-assessment.
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