New for FY2027 ICD-10-CM · October 1, 2026
L02.237: Carbuncle of flank
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Carbuncle of flank. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: L00-L99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: L00-L99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: L00-L99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: L00-L99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: L00-L99 (chapter, inherited).
Excludes2
lipomelanotic reticulosis (I89.8)
Source: L00-L99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: L00-L99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: L00-L99 (chapter, inherited).
Excludes2
systemic connective tissue disorders (M30-M36)
Source: L00-L99 (chapter, inherited).
Excludes2
viral warts (B07.-)
Source: L00-L99 (chapter, inherited).
Instructional note
code (B95-B97) to identify infectious agent.
Source: L00-L08 (section, inherited).
Excludes2
hordeolum (H00.0)
Source: L00-L08 (section, inherited).
Excludes2
infective dermatitis (L30.3)
Source: L00-L08 (section, inherited).
Excludes2
local infections of skin classified in Chapter 1
Source: L00-L08 (section, inherited).
Excludes2
lupus panniculitis (L93.2)
Source: L00-L08 (section, inherited).
Excludes2
panniculitis NOS (M79.3)
Source: L00-L08 (section, inherited).
Excludes2
panniculitis of neck and back (M54.0-)
Source: L00-L08 (section, inherited).
Excludes2
Perlèche NOS (K13.0)
Source: L00-L08 (section, inherited).
Excludes2
Perlèche due to candidiasis (B37.0)
Source: L00-L08 (section, inherited).
Excludes2
Perlèche due to riboflavin deficiency (E53.0)
Source: L00-L08 (section, inherited).
Excludes2
pyogenic granuloma (L98.0)
Source: L00-L08 (section, inherited).
Excludes2
relapsing panniculitis [Weber-Christian] (M35.6)
Source: L00-L08 (section, inherited).
Excludes2
viral warts (B07.-)
Source: L00-L08 (section, inherited).
Excludes2
zoster (B02.-)
Source: L00-L08 (section, inherited).
Instructional note
code to identify organism (B95-B96)
Source: L02 (category, inherited).
Excludes2
abscess of anus and rectal regions (K61.-)
Source: L02 (category, inherited).
Excludes2
abscess of female genital organs (external) (N76.4)
Source: L02 (category, inherited).
Excludes2
abscess of male genital organs (external) (N48.2, N49.-)
Source: L02 (category, inherited).
Excludes1
non-newborn omphalitis (L08.82)
Source: L02.2 (self, inherited).
Excludes1
omphalitis of newborn (P38.-)
Source: L02.2 (self, inherited).
Excludes2
abscess of breast (N61.1)
Source: L02.2 (self, inherited).
Excludes2
abscess of buttocks (L02.31)
Source: L02.2 (self, inherited).
Excludes2
abscess of female external genital organs (N76.4)
Source: L02.2 (self, inherited).
Excludes2
abscess of male external genital organs (N48.2, N49.-)
Source: L02.2 (self, inherited).
Excludes2
abscess of hip (L02.4)
Source: L02.2 (self, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does L02.237 mean in FY2027?
The official ICD-10-CM descriptor is Carbuncle of flank. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
When did L02.237 become an ICD-10-CM code?
L02.237 is new for FY2027 ICD-10-CM, effective October 1, 2026. It is absent from the FY2026 April order file. Use the code set that applies to the encounter or inpatient discharge date, and check the official Tabular instructions.
Is L02.237 billable in FY2027?
The FY2027 order file marks L02.237 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does L02.237 map to an HCC?
L02.237 is not in the current CMS mapping file (it is new for FY2027), and CMS has not yet published payment year 2028 mappings. No HCC category or RAF coefficient is shown.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.