A49.02

A49.02 is the ICD-10-CM diagnosis code for methicillin resistant staphylococcus aureus infection, unspecified site. This code describes a bacterial infection caused by Staphylococcus aureus (a common bacteria) that is resistant to methicillin antibiotics, but the specific location of the infection in the body is not documented. This type of infection is often called MRSA and can be serious because it's harder to treat with standard antibiotics. A49.02 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other bacterial diseases (a30-a49).

A49.02 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Use this unspecified site code only when the documentation does not clearly identify where the MRSA infection is located; if a specific site is documented (such as skin, bone, or bloodstream), use the more specific MRSA code for that site instead.