L98.423
Non-pressure chronic ulcer of back with necrosis of muscle
L98.423 (also written L98423) is a billable ICD-10-CM diagnosis code for non-pressure chronic ulcer of back with necrosis of muscle. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 145 codes in category L98 (Other disorders of skin and subcutaneous tissue, not elsewhere classified). The Alphabetic Index lists it under 1 entry. Its coding notes include 16 Excludes2 entries.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
A non-pressure ulcer described as healing is coded from the documentation. If the severity is not documented, the unspecified-severity code is assigned.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- lipomelanotic reticulosis (I89.8)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- viral warts (B07.-)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Wound clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry