ICDcodes.org
FY2027

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

BillableCC

Is T84.121A billable?

Yes — T84.121A is billable for FY2027. T84.121A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T84.121A may be submitted for encounters from October 1, 2026 through September 30, 2027.

T84.121A at a glance

CodeT84.121A
DescriptionDisplacement of internal fixation device of left humerus, initial encounter
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027
7th character "A"initial encounter

What does the 7th character "A" mean in T84.121A?

In T84.121A, the 7th character A means initial encounter. The 7th character is required for T84.121A to be a valid, complete code.

Same condition, different episode of care — switch the 7th character:

Which MS-DRGs does T84.121A group to?

T84.121A sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 559Aftercare, Musculoskeletal System and Connective Tissue with MCCmedical
  • 560Aftercare, Musculoskeletal System and Connective Tissue with CCmedical
  • 561Aftercare, Musculoskeletal System and Connective Tissue without CC/MCCmedical

As a secondary diagnosis, T84.121A is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is T84.121A listed in the Alphabetic Index?

The Alphabetic Index lists these routes under T84.12, the nearest indexed parent of T84.121A. Use them to find the family, then select the specific code.

  • Complication › fixation device, internal › mechanical › displacement › limb › femur (s) (from) (of)
  • Complication › fixation device, internal › mechanical › displacement › limb › fibula (s) (from) (of)
  • Complication › fixation device, internal › mechanical › displacement › limb › humerus (s) (from) (of)
  • Complication › fixation device, internal › mechanical › displacement › limb › radius (s) (from) (of)
  • Complication › fixation device, internal › mechanical › displacement › limb › tibia (s) (from) (of)
  • Complication › fixation device, internal › mechanical › displacement › limb › ulna (s) (from) (of)

Use additional code — inherited from Chapter 19

Report an additional code alongside T84.121A to fully describe the condition. T84.121A is sequenced first.

  • code to identify any retained foreign body, if applicable (Z18.-)

Use additional code — inherited from T80-T88

Report an additional code alongside T84.121A to fully describe the condition. T84.121A is sequenced first.

  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • code(s) to identify the specified condition resulting from the complication
  • code to identify devices involved and details of circumstances (Y62-Y82)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T84.121A, but a patient may have both at the same time. When documentation supports it, T84.121A and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from T80-T88

The conditions below are not part of T84.121A, but a patient may have both at the same time. When documentation supports it, T84.121A and the excluded code may both be reported.

  • any encounters with medical care for postprocedural conditions in which no complications are present, such as:
  • artificial opening status (Z93.-)
  • closure of external stoma (Z43.-)
  • fitting and adjustment of external prosthetic device (Z44.-)
  • burns and corrosions from local applications and irradiation (T20-T32)
  • complications of surgical procedures during pregnancy, childbirth and the puerperium (O00-O9A)
  • mechanical complication of respirator [ventilator] (J95.850)
  • poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4 or 6)
  • postprocedural fever (R50.82)
  • specified complications classified elsewhere, such as:
  • cerebrospinal fluid leak from spinal puncture (G97.0)
  • colostomy malfunction (K94.0-)
  • disorders of fluid and electrolyte imbalance (E86-E87)
  • functional disturbances following cardiac surgery (I97.0-I97.1)
  • intraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-)
  • ostomy complications (J95.0-, K94.-, N99.5-)
  • postgastric surgery syndromes (K91.1)
  • postlaminectomy syndrome NEC (M96.1)
  • postmastectomy lymphedema syndrome (I97.2)
  • postsurgical blind-loop syndrome (K91.2)
  • ventilator associated pneumonia (J95.851)

Excludes2 — not included here — inherited from T84

The conditions below are not part of T84.121A, but a patient may have both at the same time. When documentation supports it, T84.121A and the excluded code may both be reported.

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

Excludes2 — not included here — inherited from T84.1

The conditions below are not part of T84.121A, but a patient may have both at the same time. When documentation supports it, T84.121A and the excluded code may both be reported.

  • 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-)

How long has T84.121A existed?

T84.121A has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.