ICD-10-CM S23.421 is the diagnosis code for Sprain of chondrosternal joint. This code falls under the section "Injuries to the thorax" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). 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 S23.421 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, S23.421 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
S23.421 is the ICD-10-CM diagnosis code for "Sprain of chondrosternal joint". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S23.421 is S23.42 ("Sprain of sternum"). S23.421 provides a more specific classification within this category.
S23.421 is located in Section S20-S29 — "Injuries to the thorax" within Chapter 19 of the ICD-10-CM Tabular List.
Use S23.421 when the patients documented diagnosis matches "Sprain of chondrosternal joint" 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 Sprain of chondrosternal joint is S23.421.
Yes, S23.421 can be used as a primary diagnosis code since it is billable and specific.
S23.421 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S23.421 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.