FY2016
Effective from
- First observed
Unequal limb length (acquired), tibia and fibula
Category — select a more specific code
CDC/NCHS · FY2016For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2015-10-01
No recorded change since first observation
Effective from
Unequal limb length (acquired), tibia and fibula
Category — select a more specific code
CDC/NCHS · FY2016| All editions | Effective from | Code history |
|---|---|---|
| FY2016 | 2015-10-01 | First observed |
| FY2017 | 2016-10-01 | No tabular change |
| FY2018 | 2017-10-01 | No tabular change |
| FY2019 | 2018-10-01 | No tabular change |
| FY2020 | 2019-10-01 | No tabular change |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | No tabular change |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | No tabular change |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | No tabular change |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
The official Tabular List has no additional instructions at this code level.
Review the instructions inherited from its parent categories below. Inherited instructions ↓
Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Disorders affecting predominantly peripheral (limb) joints
The site used should correspond to the shorter limb
M21.761Unequal limb length (acquired), right tibiaBillable / specificM21.762Unequal limb length (acquired), left tibiaBillable / specificM21.763Unequal limb length (acquired), right fibulaBillable / specificM21.764Unequal limb length (acquired), left fibulaBillable / specificM21.769Unequal limb length (acquired), unspecified tibia and fibulaBillable / specificOther entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| M21.70 | Unequal limb length (acquired), unspecified site | Billable / specific |
| M21.72 | Unequal limb length (acquired), humerus | Category · further specificity required |
| M21.73 | Unequal limb length (acquired), ulna and radius | Category · further specificity required |
| M21.75 | Unequal limb length (acquired), femur | Category · further specificity required |
Official titles and instructions are preserved in their source language. Official sources ↗