T85.850A Stenosis due to nervous system prosthetic devices, implants and grafts, initial encounter

Billable ICD-10-CM code, FY2026.

Built from T85.850 with 7th character A (initial encounter).

Applies from T85 Complications of other internal prosthetic devices, implants and grafts

Excludes2 (not included here)

• failure and rejection of transplanted organs and tissue (T86.-)

7th character note

• The appropriate 7th character is to be added to each code from category T85

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Risk adjustment (HCC)

• CMS-HCC V22: HCC 176 — Complications of Specified Implanted Device or Graft
• ESRD V24: HCC 176

Code annotations containing back-references to T85.850A

Back-references to T85.8

• Type 2 Excludes: T80.1 Vascular complications following infusion, transfusion and therapeutic injection ("vascular complications specified as due to prosthetic devices, implants and grafts (T82.8-, T83.8-, T84.8-, T85.8-)")

Back-references to T85

• Type 2 Excludes: T78 Adverse effects, not elsewhere classified ("complications of surgical and medical care NEC (T80-T88)")
• Type 2 Excludes: T79 Certain early complications of trauma, not elsewhere classified ("complications occurring during or following medical procedures (T80-T88)")
• Type 2 Excludes: T79 Certain early complications of trauma, not elsewhere classified ("complications of surgical and medical care NEC (T80-T88)")
• Type 2 Excludes: T81 Complications of procedures, not elsewhere classified ("complication of prosthetic devices, implants and grafts (T82-T85)")
• Type 2 Excludes: T88 Other complications of surgical and medical care, not elsewhere classified ("complications of devices, implants and grafts (T82-T85)")
• Type 2 Excludes: Z96 Presence of other functional implants ("complications of internal prosthetic devices, implants and grafts (T82-T85)")
• Type 1 Excludes: Z97 Presence of other devices ("complications of internal prosthetic devices, implants and grafts (T82-T85)")

Diagnosis Index entries for T85.850A

• Complication (s) (from) (of) › catheter (device) NEC › epidural infusion › stenosis
• Complication (s) (from) (of) › catheter (device) NEC › subdural infusion › stenosis
• Complication (s) (from) (of) › electronic stimulator device › brain › stenosis
• Complication (s) (from) (of) › electronic stimulator device › nervous system › stenosis
• Complication (s) (from) (of) › electronic stimulator device › peripheral nerve › stenosis
• Complication (s) (from) (of) › electronic stimulator device › spinal cord › stenosis
• Complication (s) (from) (of) › ventricular (communicating) shunt (device) › stenosis
• Stenosis, stenotic (cicatricial) › due to presence of device, implant or graft › catheter › infusion NEC › spinal (epidural) (subdural)
• Stenosis, stenotic (cicatricial) › due to presence of device, implant or graft › ventricular intracranial shunt

Nearby codes

• T85.848A Pain due to other internal prosthetic devices, implants and grafts, initial encounter
• T85.848D Pain due to other internal prosthetic devices, implants and grafts, subsequent encounter
• T85.848S Pain due to other internal prosthetic devices, implants and grafts, sequela
• T85.85 Stenosis due to internal prosthetic devices, implants and grafts, not elsewhere classified
• T85.850 Stenosis due to nervous system prosthetic devices, implants and grafts
• T85.850A Stenosis due to nervous system prosthetic devices, implants and grafts, initial encounter (this code)
• T85.850D Stenosis due to nervous system prosthetic devices, implants and grafts, subsequent encounter
• T85.850S Stenosis due to nervous system prosthetic devices, implants and grafts, sequela
• T85.858 Stenosis due to other internal prosthetic devices, implants and grafts
• T85.858A Stenosis due to other internal prosthetic devices, implants and grafts, initial encounter
• T85.858D Stenosis due to other internal prosthetic devices, implants and grafts, subsequent encounter