Alberta claim rejection and explanatory codes

When a claim is rejected or adjusted by Alberta Health, the rejection comes with an explanatory code. Understanding these codes is key to fixing the issue and preventing recurring rejections.

Alberta SOMB uses 184 explanatory codes to communicate why a claim was rejected, reduced, or adjusted. This page covers the most common ones and what to do about them.

What are explanatory codes?

When you submit a billing claim and it's not paid in full, Alberta Health returns an explanatory code that describes the reason. These codes fall into several categories:

• Rejection codes — the claim was denied entirely (no payment)
• Adjustment codes — the claim was paid but at a reduced amount
• Information codes — informational messages about how the claim was processed

Most common rejection reasons

Duplicate claim

The same service was already billed and paid. This can happen when billing software resubmits claims automatically or when the physician bills manually without checking claim history.

Service not covered

The billed code is not covered under the patient's registration, the code is used outside its approved scope, or the code requires specific conditions that weren't met.

Modifier not applicable

A modifier was applied to a code that doesn't support it. Common examples include applying after-hours premiums to ineligible codes or using CMGP on non-qualifying visits.

Exceeds frequency limit

Some codes have frequency limits — maximum number of times they can be billed per patient within a specified period. Exceeding these limits triggers automatic rejection.

Bundling conflict

Two codes were billed together that SOMB considers bundled — meaning one includes the other. The secondary code is rejected because the primary code already covers the service.

Documentation requested

Alberta Health is requesting chart documentation to support the billed code. This isn't a rejection per se, but failure to provide documentation within the required timeframe results in clawback.

How to reduce rejections

• Verify code eligibility before submitting — check modifier applicability, frequency limits, and bundling rules
• Document thoroughly — the most defensible claim is one backed by clear chart notes
• Check for duplicates — before billing, verify the service hasn't already been submitted
• Review rejection reports — look for patterns in your rejections; recurring codes point to systematic billing errors
• Use structured review — catch modifier errors, bundling conflicts, and frequency issues before submission