Use of Sequela (7th character "S") Diagnosis Codes

According to the ICD-10-CM Manual guidelines, a sequela (7th character "S") code cannot be listed as the primary, first listed, or principal diagnosis on a claim, nor can it be the only diagnosis on a claim. Coding of a sequela requires reporting of the condition or nature of the sequela sequenced first, followed by the sequela (7th character "S") code.

Examples of sequela (7th character "S") diagnosis codes included in this policy:

  • M48.40XS (Fatigue fracture of vertebra, site unspecified, sequela of fracture)
  • S00.279S (Other superficial bite of unspecified eyelid and periocular area, sequela)
  • T36.1X6S (Underdosing of cephalosporins and other beta-lactam antibiotics, sequela)