THSteps Diagnosis Code Changes

Effective February 1, 2016, Texas Health Steps (THSteps) preventive care medical checkups diagnosis codes changed.  Diagnosis codes Z00110 which covers newborns birth through 7 days of age, and Z00111 which covers newborns 8 days through 28 days of age, became benefits for THSteps preventive care medical checkups.

Claims for THSteps checkups must also include diagnosis code Z23 whenever immunizations are administered as part of the checkup. 

For more information on THSteps preventive medical checkups and associated diagnosis codes, visit the Texas Health Steps website at