Billing code
G338A — Clonidine Suppression Test (for The Investigation Of Pheochromocytoma) - With Physician Present - Includes Venipunctures
Clonidine suppression test
Bill G338 for a clonidine suppression test for pheochromocytoma, done with the physician present.
Watch for: Venipunctures are included and the physician must be present; add G700 only when the test is the sole reason for the visit.
| Provider | Specialist | Assistant | Anaesthetist | Non-anaesthetist |
|---|---|---|---|---|
| $24.90 | $0.00 | $0.00 | $0.00 | $0.00 |
- Code
- G338A
- Description
- Clonidine Suppression Test (for The Investigation Of Pheochromocytoma) - With Physician Present - Includes Venipunctures
- 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
Clonidine suppression test for pheochromocytoma, with the physician present; venipunctures included.
What it covers
G338 is a clonidine suppression test to investigate pheochromocytoma, done with the physician present. Venipunctures are included in the fee (J41).
Other pheochromocytoma tests on the same pages include the Type B glucagon test (G495) and the phentolamine test (G344) (J41, J43).
Billing rules
- The physician must be present, and venipunctures are included, so they aren't billed separately (J41).
- Payable in addition to a consultation or assessment unless listed as included (J3).
- Includes preparing the patient, doing the test with monitoring afterwards, interpreting results with a written report to the referring provider where appropriate, and follow-up arrangements (J3).
- Marked (+): when the test is the sole reason for the visit, add G700 once per visit. G700 is not payable in hospital, and not when you are also paid a consultation or assessment that day and have a financial interest in the facility (J3).
- For a patient enrolled with a capitation-based group, G700 pays 15% of its fee (J3).
Often billed with
- G700 basic fee-per-visit premium when the test is the only reason for the visit, outside hospital (J3).
Related codes: G495, G344, G340, G700
Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Endocrinology and Metabolism, page J41; preamble J3.
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