Understanding MBS Item Numbers

Guide · Last updated 22 August 2026

MBS item numbers identify services listed in the Medicare Benefits Schedule. Each item has its own descriptor and may have notes, restrictions or other requirements that need to be considered when determining whether it applies.

What an item number is

The Medicare Benefits Schedule lists professional services for which Medicare benefits may be payable when the relevant requirements are met. An item number identifies a particular service and is accompanied by an item descriptor, Schedule fee and, where applicable, explanatory notes or conditions.

The clinical facts of the service provided determine which item, if any, may be applicable. A billing administrator should not change the clinical service or documentation simply to make a claim fit an item.

How the schedule is organised

The MBS is organised into categories, groups and subgroups covering different types of professional services. Related items can have similar descriptions but different requirements, so the current item descriptor and relevant explanatory notes should be checked rather than relying only on an item number or an old billing list.

Multiple services and billing rules

Where more than one service is provided, specific MBS rules may affect the benefits payable. The applicable rule depends on the items and circumstances involved; it should not be assumed that one percentage formula applies to every combination of services.

This is particularly relevant to surgical billing and gastroenterology billing, where an episode can involve more than one service.

Eligibility, restrictions and frequency conditions

Some MBS items have specific requirements, restrictions or frequency limits. Whether those requirements are satisfied depends on the circumstances of the service and the applicable MBS rules. Billing should therefore be based on accurate clinical information and current official guidance.

Why accurate practitioner-supplied information matters

An incorrect item or incomplete billing instruction can contribute to a rejected, delayed, incorrectly paid or non-compliant claim. DEVZ Solutions processes billing using clinical and billing information supplied or authorised by the practitioner and manages the administrative workflow around eligible claim preparation, lodgement, monitoring and follow-up.

Keeping up with changes

The MBS changes over time. Items, descriptors, explanatory notes, restrictions and fees may be amended. Current requirements should therefore be checked against official sources rather than relying on historical billing information. Our medical billing news section can provide general updates, but the official MBS remains the source of truth for current item requirements.