Billable / Specific Code
ICD-10-CM S20.449 is the diagnosis code for External constriction of unspecified back wall of thorax. 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 S20.449 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, S20.449 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
S20.449 is the ICD-10-CM diagnosis code for "External constriction of unspecified back wall of thorax". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S20.449 is S20.44 ("External constriction of back wall of thorax"). S20.449 provides a more specific classification within this category.
S20.449 is located in Section S20-S29 — "Injuries to the thorax" within Chapter 19 of the ICD-10-CM Tabular List.
Use S20.449 when the patients documented diagnosis matches "External constriction of unspecified back wall of thorax" 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 External constriction of unspecified back wall of thorax is S20.449.
Yes, S20.449 can be used as a primary diagnosis code since it is billable and specific.
S20.449 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S20.449 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.