Z407 – Percutaneous retroperitoneal lymph node biopsy - one group
OHIP Psychiatric Code — HAEMATIC AND LYMPHATIC SURGICAL PROCEDURES · Schedule of Benefits
Percutaneous retroperitoneal biopsy of one group of lymph nodes. This is a surgical procedure listed under the Haematic and Lymphatic system. See also Z409 for biopsy of two or more groups.
When to Use
- Use Z407 for a percutaneous biopsy targeting a single distinct group of retroperitoneal lymph nodes.
- Use Z407 when a single needle pass or multiple passes are performed on one anatomical lymph node group, as opposed to Z409 which is required for multiple distinct groups.
Common Pitfalls
- Billing Z407 alongside Z409 for the same procedure is a common error; if multiple groups are biopsied, only the higher-value code (Z409) is appropriate.
- Submitting Z407 for an open surgical biopsy is incorrect, as this code is specifically restricted to percutaneous procedures.
Billing Tips
- Ensure your operative report explicitly identifies the specific lymph node group biopsied to justify the use of Z407 over Z409.
- If the procedure is performed after hours or on a weekend, ensure you append the correct premium (E409 or E410) to the Z407 claim to capture the 50-75% increase.
Effective: April 1, 2026
R. Haematic and Lymphatic Surgical Procedures
HAEMATIC AND LYMPHATIC SURGICAL PROCEDURES
Surgical
Haematic and Lymphatic 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.
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