Most rejections come down to three things: the wrong MBS item, a benefit limit already reached, or a patient or provider who is not eligible. You cut them by checking the patient and their card before the service, confirming the right item and its rules, and acting on the return code quickly when one does come back.
When Medicare cannot pay a claim as lodged, it returns a code with the reason. Services Australia names three common causes:
Other frequent causes are a card detail that does not match Medicare's records, a missing or invalid referral, a duplicate of a claim already paid, and transmission errors.
Two code systems tell you which happened. A 3-digit reason code explains how a claim was assessed against the benefit rules. A 4-digit return code flags an error in the transaction. You look up the code, fix the issue, then resubmit or adjust the claim.
Check the patient's Medicare card and details against Medicare's records before you claim. Services Australia says this reduces the number of rejected claims, because you catch a wrong card number, an expired card, or an eligibility problem while the patient is still in front of you.
Confirm the MBS item on MBS Online, including its descriptor and notes. For questions about how to read the Schedule, AskMBS gives interpretation advice. It does not handle claiming or return codes, which go to Services Australia.
Many items cap how often they can be claimed in a period. Knowing a patient's recent claiming avoids a ‘maximum benefits reached’ rejection, which Medicare applies when it assesses the claim.
Contemporaneous notes that substantiate each item support the claim and meet your obligations if it is ever reviewed. Good record-keeping is one of the strategies in the Department of Health’s Medicare Billing Assurance Toolkit.
When a claim rejects, look up the reason or return code, correct the issue, and resubmit or adjust promptly. Reviewing rejections as they land, rather than in a monthly batch, keeps revenue moving and surfaces patterns worth fixing at the source.
If you bulk bill, the way a patient assigns their Medicare benefit changed. The agreement can now be given before or after the service, on paper or electronically, and the old approved forms are no longer required. Ongoing ‘enduring’ consent is available for MyMedicare-registered patients, aged-care residents, and patients of Aboriginal Community Controlled Health Services.
Keep a copy of each agreement for two years. A 12-month transition period allows verbal assignment while practices update their workflows and software. Getting the new consent right avoids assignment-related rejections on bulk-billed claims.
The eligibility and card-detail part of rejections is the part you can catch up front. RebateRight checks the patient and each MBS item against Medicare’s records before you claim, and returns a plain-English reason on anything that will not pay. It verifies the Medicare side: enrolment, card details, and per-item eligibility.
It does not judge clinical relevance, and a valid card is never a guarantee on its own, so some outcomes are still decided when Medicare assesses the claim. What it does is move the eligibility and card problems from weeks after the visit to seconds before it.
The most common reasons Services Australia names are the wrong MBS item, the patient having already reached the maximum benefits for an item, and the patient or health professional not being eligible. A card detail that does not match Medicare’s records, a missing or invalid referral, a duplicate of a claim already paid, and transmission errors also cause rejections.
A 3-digit reason code explains how Medicare assessed a claim against the benefit rules. A 4-digit return code flags an error in an online or ECLIPSE transaction. You look up the code to see why a claim was rejected, then correct the issue and resubmit or adjust.
No. Verifying a card confirms the patient’s details and eligibility against Medicare’s records, which reduces rejections, but it does not guarantee payment. A claim can still be rejected for the item chosen, clinical relevance, or benefit limits, which Medicare decides when it assesses the claim.
Check the patient and their card before the service, confirm the correct MBS item and its rules, watch benefit limits, keep clear records, and act quickly on the reason or return code when a claim does reject.
One call verifies the patient and checks each item against the rules, with a plain-English reason on every result.