ICD-10-CM 7th Character and how it is used

by  Christine Woolstenhulme, QMC QCC CMCS CPC CMRS
Sep 17th, 2015

The use of the 7^th character used in certain chapters (e.g., Obstetrics, Injury, Musculoskeletal, and External Cause chapters).  However,  it is not used in every chapter and may have a different meaning depending on the section where it is being used.  One thing that is consistent, is that it must be used in the 7th character position (using the x place holder if necessary) when a 7th character applies and it is not used the code is considered invalid.

Use of 7^th Characters by Chapter

• Obstetric

            Multiple gestations –identification of fetus affected by condition

•  Injury

           Type of encounter

           Closed vs. open fracture

           Routine vs. delayed healing

           Malunion or nonunion of fracture

•  Musculoskeletal

           Type of encounter

           Routine vs. delayed healing

           Malunion or nonunion of fracture

           Additional clinical information

•  External Cause

           Type of encounter

 7th Character Describing Encounter

•  Initial encounter: As long as patient is receiving active treatment for the condition.

•  Subsequent encounter: After patient has received active treatment of the condition and is receiving routine care for the condition during the healing or recovery phase.

•  Sequela: Complications or conditions that arise as a direct result of a condition (e.g., scar formation after a burn).

 Note: For aftercare of injury, assign acute injury code with 7^th character for subsequent encounter.

7th Character – Fractures

     A Initial encounter for closed fracture

     B Initial encounter for open fracture

     D Subsequent encounter for fracture with routine healing

     G Subsequent encounter for fracture with delayed healing

     K Subsequent encounter for fracture with nonunion

     P Subsequent encounter for fracture with malunion

     S Sequel