L98.42 – Non-pressure chronic ulcer of back
ICD-10-CM 2027 diagnosis code · Other disorders of the skin and subcutaneous tissue
- Code
L98.42(claims format:L9842)- Description
- Non-pressure chronic ulcer of back
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 12. Diseases of the skin and subcutaneous tissue (L00-L99)
- Block
- L80-L99 Other disorders of the skin and subcutaneous tissue
- Parent codes
- L98 › L98.4
Billable codes under L98.42
L98.42 is a header code and cannot be used on claims. Choose the most specific code:
- L98.421 – Non-pressure chronic ulcer of back limited to breakdown of skinBillable
- L98.422 – Non-pressure chronic ulcer of back with fat layer exposedBillable
- L98.423 – Non-pressure chronic ulcer of back with necrosis of muscleBillable
- L98.424 – Non-pressure chronic ulcer of back with necrosis of boneBillable
- L98.425 – Non-pressure chronic ulcer of back with muscle involvement without evidence of necrosisBillable
- L98.426 – Non-pressure chronic ulcer of back with bone involvement without evidence of necrosisBillable
- L98.428 – Non-pressure chronic ulcer of back with other specified severityBillable
- L98.429 – Non-pressure chronic ulcer of back with unspecified severityBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
L98.4 – Non-pressure chronic ulcer of skin, not elsewhere classified
- Chronic ulcer of skin NOS
- Tropical ulcer NOS
- Ulcer of skin NOS
Related codes in L98.4
- L98.41 – Non-pressure chronic ulcer of buttockHeader
- L98.43 – Non-pressure chronic ulcer of abdomenHeader
- L98.44 – Non-pressure chronic ulcer of chestHeader
- L98.45 – Non-pressure chronic ulcer of neckHeader
- L98.46 – Non-pressure chronic ulcer of faceHeader
- L98.47 – Non-pressure chronic ulcer of groinHeader
- L98.49 – Non-pressure chronic ulcer of skin of other sitesHeader
Frequently asked questions
What is ICD-10 code L98.42?
L98.42 is the ICD-10-CM code for non-pressure chronic ulcer of back, in the block L80-L99 (Other disorders of the skin and subcutaneous tissue).
Is L98.42 a billable code?
No. L98.42 is a header code with more specific child codes; report one of the billable codes listed above.
What category does L98.42 belong to?
It belongs to category L98 – Other disorders of skin and subcutaneous tissue, not elsewhere classified.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.