Medical billing is the financial backbone of every GP practice in Australia. Understanding how Medicare billing works, which item numbers to use, and how to maintain compliance with billing rules directly impacts your revenue, audit risk, and long-term practice viability. This guide covers the essential elements of medical billing for GPs, from MBS item selection through to compliance and revenue optimisation.
Talk with our Regulatory Growth team to get expert support with your medical billing setup and compliance.
How Medicare Billing Works for GPs
Medicare is Australia’s universal health insurance scheme, administered by Services Australia. When a GP provides a clinical service, they bill Medicare using an item number from the Medicare Benefits Schedule (MBS). The MBS lists every medical service eligible for a Medicare rebate, along with the schedule fee and rebate amount for each item.
For each consultation, the GP selects the MBS item that most accurately describes the service provided. The item selection must reflect the nature, duration, and complexity of the consultation. Incorrect item selection, whether intentional or accidental, is the most common source of Medicare compliance issues for GPs.
Every GP who bills Medicare must hold a valid Medicare provider number for their practice location. Claims are submitted electronically through the Medicare Online Claiming system, and payments are typically processed within a few business days.
Key MBS Item Numbers for General Practice
Standard Consultation Items (Items 3, 23, 36, 44)
The standard GP consultation items are tiered by consultation length and complexity. Item 3 covers brief consultations (Level A), typically under 10 minutes for straightforward issues. Item 23 is the most commonly billed GP item (Level B), covering standard consultations of approximately 10 to 20 minutes. Item 36 covers longer consultations (Level C) of approximately 20 to 40 minutes involving more complex clinical assessment. Item 44 covers prolonged consultations (Level D) exceeding 40 minutes for the most complex presentations.
Selecting the correct item level requires clinical judgement. The Medical Board and Medicare both expect that the item billed reflects the actual complexity and duration of the service, not just the time spent with the patient. Clinical documentation must support the item level claimed.
Chronic Disease Management Items
The MBS includes specific items for GP Management Plans (Item 721), Team Care Arrangements (Item 723), and Review of GP Management Plan (Item 732). These items support the management of patients with chronic or complex conditions and attract higher rebates than standard consultations. Effective use of chronic disease management items can significantly increase practice revenue while improving patient outcomes.
For detailed guidance on implementing chronic disease management programs, see our chronic disease management guide.
Health Assessment Items
Health assessment items cover specific preventive health assessments for defined patient populations. Key items include Item 701/703/705/707 (health assessments for specific age and risk groups), Item 715 (Aboriginal and Torres Strait Islander health assessment), and Item 2715-2727 (mental health treatment plans). These items represent significant revenue opportunities for practices that systematically identify and recall eligible patients.
Billing Models: Bulk Billing vs Private Billing
Your billing model determines how you charge patients and collect revenue. Under bulk billing, you accept the Medicare rebate as full payment and the patient pays nothing. Under private billing, you charge a fee above the Medicare rebate and the patient pays the gap. Many practices use a mixed model that combines both approaches for different patient groups or consultation types.
Each model has different financial, operational, and patient relationship implications. For a comprehensive comparison of bulk billing versus private billing, including financial modelling and location-specific factors, see our detailed billing model comparison.
Medicare Compliance and Audit Risk
Professional Services Review (PSR)
The Professional Services Review (PSR) scheme is the primary mechanism for investigating inappropriate Medicare claiming. The PSR uses statistical analysis to identify practitioners whose billing patterns are significantly above their peer average. If your billing is flagged, you may be referred for a review that examines your clinical records and billing practices in detail.
PSR outcomes can range from no further action through to repayment orders, partial or full disqualification from Medicare, and referral to AHPRA. The consequences of adverse PSR findings are severe and can end careers. Maintaining compliant billing practices from the outset is far preferable to defending a PSR investigation.
Common Compliance Errors
The most common Medicare billing errors include upcoding (billing a higher item level than the service supports), billing time-based items without adequate clinical documentation of time spent, claiming chronic disease management items outside the eligible frequency, billing for services not personally rendered by the billing practitioner, and failing to maintain adequate clinical records that justify each claim.
Protecting Your Practice
To minimise compliance risk, implement regular internal billing audits, ensure all GPs understand the MBS descriptors for items they commonly bill, maintain comprehensive clinical records for every consultation, monitor your billing patterns against peer averages using the HPOS dashboard, and address any anomalies proactively before they trigger external scrutiny.
Maximising Practice Revenue Through Billing
Revenue optimisation in general practice comes from billing accurately (not aggressively), systematically identifying eligible patients for chronic disease management and health assessment items, participating in the Practice Incentives Program (PIP), implementing recall systems for preventive health activities, and training all GPs and billing staff in correct MBS item selection.
Practices that invest in billing education and regular auditing consistently outperform those that rely on individual practitioners to “get it right.” A dedicated practice manager or billing administrator who understands MBS rules is one of the highest-return investments a practice can make.
How HCPA Supports Medical Billing Excellence
As Regulatory Growth Consultants, the HCPA team helps GP practices establish compliant, optimised billing systems. We provide support with MBS item education and training, billing model analysis and financial modelling, Medicare compliance auditing, Practice Incentives Program registration, and chronic disease management program implementation.
Our consultants work with practices of all sizes, from solo GPs to large multi-practitioner clinics. Whether you are setting up a new practice or reviewing billing performance at an established clinic, we provide the expertise to help you bill correctly and maximise your revenue within Medicare’s rules.
Explore our GP clinic registration services for a complete overview of our practice setup and billing support.
Talk with our consultants to improve your medical billing practices and protect your Medicare compliance.
