Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

T23.5

Corrosion of first degree of wrist and hand

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T23.50Corrosion of first degree of hand, unspecified siteCategory
T23.501Corrosion of first degree of right hand, unspecified siteCategory
T23.501ACorrosion of first degree of right hand, unspecified site, initial encounterBillable
T23.501DCorrosion of first degree of right hand, unspecified site, subsequent encounterBillable
T23.501SCorrosion of first degree of right hand, unspecified site, sequelaBillable
T23.502Corrosion of first degree of left hand, unspecified siteCategory
T23.502ACorrosion of first degree of left hand, unspecified site, initial encounterBillable
T23.502DCorrosion of first degree of left hand, unspecified site, subsequent encounterBillable
T23.502SCorrosion of first degree of left hand, unspecified site, sequelaBillable
T23.509Corrosion of first degree of unspecified hand, unspecified siteCategory
T23.509ACorrosion of first degree of unspecified hand, unspecified site, initial encounterBillable
T23.509DCorrosion of first degree of unspecified hand, unspecified site, subsequent encounterBillable
T23.509SCorrosion of first degree of unspecified hand, unspecified site, sequelaBillable
T23.51Corrosion of first degree of thumb (nail)Category
T23.511Corrosion of first degree of right thumb (nail)Category
T23.511ACorrosion of first degree of right thumb (nail), initial encounterBillable
T23.511DCorrosion of first degree of right thumb (nail), subsequent encounterBillable
T23.511SCorrosion of first degree of right thumb (nail), sequelaBillable
T23.512Corrosion of first degree of left thumb (nail)Category
T23.512ACorrosion of first degree of left thumb (nail), initial encounterBillable
T23.512DCorrosion of first degree of left thumb (nail), subsequent encounterBillable
T23.512SCorrosion of first degree of left thumb (nail), sequelaBillable
T23.519Corrosion of first degree of unspecified thumb (nail)Category
T23.519ACorrosion of first degree of unspecified thumb (nail), initial encounterBillable
T23.519DCorrosion of first degree of unspecified thumb (nail), subsequent encounterBillable
T23.519SCorrosion of first degree of unspecified thumb (nail), sequelaBillable
T23.52Corrosion of first degree of single finger (nail) except thumbCategory
T23.521Corrosion of first degree of single right finger (nail) except thumbCategory
T23.521ACorrosion of first degree of single right finger (nail) except thumb, initial encounterBillable
T23.521DCorrosion of first degree of single right finger (nail) except thumb, subsequent encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.