M46.4

Clinical Information

• Inflammation of an intervertebral disc or disk space which may lead to disk erosion. Until recently, discitis has been defined as a nonbacterial inflammation and has been attributed to aseptic processes e.g., chemical reaction to an injected substance). However, recent studies provide evidence that infection may be the initial cause, but perhaps not the promoter, of most cases of discitis. Discitis has been diagnosed in patients following discography, myelography, lumbar puncture, paravertebral injection, and obstetrical epidural anesthesia. Discitis following chemonucleolysis especially with chymopapain) is attributed to chemical reaction by some and to introduction of microorganisms by others.

Details

• M46.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.

• The 2023 edition of ICD-10-CM M46.4 became effective on October 1, 2022.

• This is the American ICD-10-CM version of M46.4 – other international versions of ICD-10 M46.4 may differ.