New CMS directive says claims with E codes as primary diagnoses unprocessable. If you're submitting paper claims to Medicare with E codes in the primary diagnosis slot, don't expect a favorable response from the Centers for Medicare & Medicaid Services. The agency has released a new directive that tells MACs to return as unprocessable claims submitted on the Form CMS-1500 where an ICD-9-CM 'E' code (external causes of injury and poisoning) is reported as the first/principal diagnosis on the claim. Although this policy was already in place for electronic claims, the new announcement brings the policy for handling CMS-1500 claims into alignment with the policy for handling claims initially submitted in electronic format, according to MLN Matters article MM7700, released on Aug. 8. If you could use a refresher on when E codes are appropriate, read on for some expert tips on how to use these diagnoses. Put E Codes in Their Place E codes represent external causes of injury and poisoning. According to the section introduction, E codes are provided to permit the classification of environmental events, circumstances, and conditions as the cause of injury, poisoning, and other adverse effects. Important: Payers don't require E codes on claims. However, you can use an E code (and often more than one E code) to fully describe circumstances or establish medical necessity. Example: List a diagnosis code for a contusion of the forearm (923.10) as the primary diagnosis. But some payers might question the E/M level for the workup because the diagnosis is not specific. However, if you include E016.1 (Activities involving property and land maintenance, building and construction; gardening and landscaping), E849.6 (Place of occurrence; public building), and E881.0 (Fall on or from ladders or scaffolding; fall from ladder), the payer would have information justifying workup and, possibly, x-rays to check for a fracture or more severe injury. Get to Know These Crucial E Code Basics According to ICD-9, the main purpose of E codes is to statistically track the incidence of accidental injury. For example, the well known statistic that most accidents happen in the home was obtained through the use of E-code tracking. E codes do not change your reimbursement amount because they are considered for informational purposes only codes. They can help speed up the reimbursement you're due, however, because insurers may have fewer follow-up questions about your claims if E codes give them a fuller picture of a patient's diagnosis. Plus, in cases where your patient is injured by a moving car, either as a pedestrian, bike rider, or passenger, you'll often have to deal with auto insurers, which may require E codes. Check for Common 'E' Codes in Your Practice If you think E codes don't apply to you, consider these possibilities: Have you ever treated a patient for a dog bite? How about a bee sting? Or an allergic reaction to antibiotics? These are all covered in ICD-9's E code section. Keep the following common family medicine E codes in mind when you're selecting your diagnoses going forward: Bottom line: