Why this matters for your practice
The MBS is the rulebook for every dollar a practice claims from Medicare. Each item number is a complete instruction set: it defines exactly what clinical content a service must include before that item can be billed. Compliance problems usually come down to a gap between the item descriptor and what actually happened in the consultation. Because the MBS changes regularly, with items added, amended, and removed several times a year, a practice has to keep its billing aligned with the current schedule, not last year's.
Understanding the MBS as a set of defined services, each with conditions, is the foundation for correct billing.
How the MBS is structured
- Item number: a unique code identifying the service.
- Descriptor: the definition of what the service is and what it must include. A complete medical service covers all the components described.
- Schedule fee: the fee the government sets for the item, used to calculate the Medicare benefit. It is not necessarily what the practitioner charges.
- Explanatory notes: guidance on how and when items can be used, including restrictions and co-claiming rules.
Schedule fee versus the fee charged
The schedule fee is the basis for the Medicare benefit (for example 100% of the schedule fee for GP attendances out of hospital). A practice can charge more than the schedule fee privately, in which case the patient pays the gap, or accept the benefit as full payment by bulk billing.
Why descriptors matter for compliance
If the clinical content of a consultation does not meet the item descriptor, billing that item is incorrect, even if done in good faith. This is the territory the Professional Services Review examines. Time-based items, in particular, require the documented consultation length to match the item claimed.
Common mistakes
- Billing to the item you want rather than the item the consultation meets.
- Using superseded items after an MBS update.
- Ignoring co-claiming rules in the explanatory notes.
- Time-based items without documented time.
Frequently Asked Questions
What is the Medicare Benefits Schedule?
The Medicare Benefits Schedule (MBS) is the government listing of medical, diagnostic, and allied health services subsidised by Medicare. Each service has an item number, a descriptor defining what it must include, and a schedule fee used to calculate the Medicare benefit.
What is an MBS item descriptor?
An item descriptor is the definition of an MBS service: it sets out exactly what clinical content the service must include before the item can be billed. If the consultation does not meet the descriptor, billing that item is incorrect.
What is the schedule fee?
The schedule fee is the fee the government sets for each MBS item, used to calculate the Medicare benefit. It may differ from what a practitioner actually charges. A practice can bill privately above it or bulk bill by accepting the benefit as full payment.
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