T84.121A Displacement of internal fixation device of left humerus, initial encounter

Billable ICD-10-CM code, FY2026.

Built from T84.121 with 7th character A (initial encounter).

Applies from T84 Complications of internal orthopedic prosthetic devices, implants and grafts

Excludes2 (not included here)

• failure and rejection of transplanted organs and tissues (T86.-)
• fracture of bone following insertion of orthopedic implant, joint prosthesis or bone plate (M96.6)

7th character note

• The appropriate 7th character is to be added to each code from category T84

7th character required

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

Applies from T84.1 Mechanical complication of internal fixation device of bones of limb

Excludes2 (not included here)

• mechanical complication of internal fixation device of bones of feet (T84.2-)
• mechanical complication of internal fixation device of bones of fingers (T84.2-)
• mechanical complication of internal fixation device of bones of hands (T84.2-)
• mechanical complication of internal fixation device of bones of toes (T84.2-)

Applies from T84.12 Displacement of internal fixation device of bones of limb

Applicable to

• Malposition of internal fixation device of bones of limb

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 T84.121A

Back-references to T84.1

• Type 2 Excludes: T81.59 Other complications of foreign body accidentally left in body following procedure ("obstruction or perforation due to prosthetic devices and implants intentionally left in body (T82.0-T82.5, T83.0-T83.4, T83.7, T84.0-T84.4, T85.0-T85.6)")
• Type 1 Excludes: T85.612 Breakdown (mechanical) of permanent sutures ("mechanical complication of permanent (wire) suture used in bone repair (T84.1-T84.2)")
• Type 1 Excludes: T85.622 Displacement of permanent sutures ("mechanical complication of permanent (wire) suture used in bone repair (T84.1-T84.2)")
• Type 1 Excludes: T85.692 Other mechanical complication of permanent sutures ("mechanical complication of permanent (wire) suture used in bone repair (T84.1-T84.2)")
• Type 1 Excludes: Z47.2 Encounter for removal of internal fixation device ("mechanical complication of internal fixation device (T84.1-)")

Back-references to T84

• Type 2 Excludes: M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified ("complications of internal orthopedic prosthetic devices, implants and grafts (T84.-)")
• Type 2 Excludes: M96.6 Fracture of bone following insertion of orthopedic implant, joint prosthesis, or bone plate ("complication of internal orthopedic devices, implants or grafts (T84.-)")
• 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)")

Nearby codes

• T84.120 Displacement of internal fixation device of right humerus
• T84.120A Displacement of internal fixation device of right humerus, initial encounter
• T84.120D Displacement of internal fixation device of right humerus, subsequent encounter
• T84.120S Displacement of internal fixation device of right humerus, sequela
• T84.121 Displacement of internal fixation device of left humerus
• T84.121A Displacement of internal fixation device of left humerus, initial encounter (this code)
• T84.121D Displacement of internal fixation device of left humerus, subsequent encounter
• T84.121S Displacement of internal fixation device of left humerus, sequela
• T84.122 Displacement of internal fixation device of bone of right forearm
• T84.122A Displacement of internal fixation device of bone of right forearm, initial encounter
• T84.122D Displacement of internal fixation device of bone of right forearm, subsequent encounter