ICD-10-CM > S00-T88 > T80-T88 > T85 > T85.8 > T85.85 T85.85 Stenosis due to internal prosthetic devices, implants and grafts, not elsewhere classified Non-Billable/Non-Specific Codes T85.850Stenosis due to nervous system prosthetic devices, implants and graftsT85.850A..., initial encounterT85.850D..., subsequent encounterT85.850S..., sequelaT85.858Stenosis due to other internal prosthetic devices, implants and graftsT85.858A..., initial encounterT85.858D..., subsequent encounterT85.858S..., sequela