T23.549ABillable
Corrosion of first degree of unspecified multiple fingers (nail), including thumb, initial encounter
Short description: Corros first degree of unsp mult fngr, inc thumb, init
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T23
- Effective date
- October 1, 2026
Related codes in category T23
T23Burn and corrosion of wrist and handT23.0Burn of unspecified degree of wrist and handT23.00Burn of unspecified degree of hand, unspecified siteT23.001Burn of unspecified degree of right hand, unspecified siteT23.001ABurn of unsp degree of right hand, unsp site, init encntrYesT23.001DBurn of unsp degree of right hand, unsp site, subs encntrYesT23.001SBurn of unsp degree of right hand, unspecified site, sequelaYesT23.002Burn of unspecified degree of left hand, unspecified siteT23.002ABurn of unsp degree of left hand, unsp site, init encntrYesT23.002DBurn of unsp degree of left hand, unsp site, subs encntrYesT23.002SBurn of unsp degree of left hand, unspecified site, sequelaYesT23.009Burn of unsp degree of unspecified hand, unspecified site
Frequently asked questions
What is ICD-10 code T23.549A?
T23.549A is an ICD-10-CM diagnosis code for Corrosion of first degree of unspecified multiple fingers (nail), including thumb, initial encounter.
Is T23.549A a billable code?
Yes. T23.549A is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is T23.549A in?
T23.549A falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T23.549A become effective?
T23.549A has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T23.549A?
T23.549A belongs to category T23, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.