Billable / Specific Code
ICD-10-CM T21.64 is the diagnosis code for Corrosion of second degree of lower back. This code falls under the section "Burns and corrosions of external body surface, specified by site" 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 T21.64 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, T21.64 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
T21.64 is the ICD-10-CM diagnosis code for "Corrosion of second degree of lower back". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T21.64 is T21.6 ("Corrosion of second degree of trunk"). T21.64 provides a more specific classification within this category.
T21.64 is located in Section T20-T25 — "Burns and corrosions of external body surface, specified by site" within Chapter 19 of the ICD-10-CM Tabular List.
Use T21.64 when the patients documented diagnosis matches "Corrosion of second degree of lower back" 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 Corrosion of second degree of lower back is T21.64.
Yes, T21.64 can be used as a primary diagnosis code since it is billable and specific.
T21.64 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T21.64 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.