Final answer:
The correct ICD-10 code for osteoarthritis in the right knee due to a military injury that happened a few years ago is M17.31, which specifies post-traumatic osteoarthritis of the right knee.option a is correct.
Step-by-step explanation:
In the context of medical coding, when the documentation indicates that osteoarthritis in the right knee is due to a military injury that occurred a few years ago, one must select the code that correctly captures both the condition (osteoarthritis) and the cause (due to an old injury). The appropriate ICD-10 (International Classification of Diseases, Tenth Revision) code in this scenario would be M17.31, which specifies post-traumatic osteoarthritis of the right knee.
Each code has a specific meaning:
- M17.31: Post-traumatic osteoarthritis of the right knee
- M17.5: Osteoarthritis of the knee, unspecified whether primary or secondary and whether it is bilateral or involving a single knee
- M17.9: Osteoarthritis of the knee, unspecified
Therefore, code
M17.31
is the correct one because it identifies the osteoarthritis as being post-traumatic, which reflects the history of a military injury.