Billable / Specific Code
ICD-10-CM M23.321 is the diagnosis code for Other meniscus derangements, posterior horn of medial meniscus, right knee. This code falls under the section "Other joint disorders" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where M23.321 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M23.321 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M23.321 is the ICD-10-CM diagnosis code for "Other meniscus derangements, posterior horn of medial meniscus, right knee". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M23.321 is M23.32 ("Other meniscus derangements, posterior horn of medial meniscus"). M23.321 provides a more specific classification within this category.
M23.321 is located in Section M20-M25 — "Other joint disorders" within Chapter 13 of the ICD-10-CM Tabular List.
Use M23.321 when the patients documented diagnosis matches "Other meniscus derangements, posterior horn of medial meniscus, right knee" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other meniscus derangements, posterior horn of medial meniscus, right knee is M23.321.
Yes, M23.321 can be used as a primary diagnosis code since it is billable and specific.
M23.321 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M23.321 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.