Is T23.549 a billable code?
No. T23.549 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
T23.549: Corrosion of first degree of unspecified multiple fingers (nail), including thumb
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
T23.549 groups related diagnoses under corrosion of first degree of unspecified multiple fingers (nail), including thumb. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under T23.549
- T23.549ACorrosion of first degree of unspecified multiple fingers (nail), including thumb, initial encounter
- T23.549DCorrosion of first degree of unspecified multiple fingers (nail), including thumb, subsequent encounter
- T23.549SCorrosion of first degree of unspecified multiple fingers (nail), including thumb, sequela
Other codes in T23.54 Corrosion of first degree of multiple fingers (nail), including thumb
T23.549 questions
What does T23.549 mean?
T23.549 is the ICD-10-CM code for Corrosion of first degree of unspecified multiple fingers (nail), including thumb. It is in chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.