ICD-10-CM > S00-T88 > T80-T88 > T85 > T85.8 > T85.82 > T85.820 T85.820 Fibrosis due to nervous system prosthetic devices, implants and grafts Non-Billable/Non-Specific Codes T85.820A..., initial encounterT85.820D..., subsequent encounterT85.820S..., sequela