2027 ICD-10-CM Diagnosis Code L02.237Carbuncle of flank

ICD-10-CM Codes›L00–L99›L00-L08›L02

ICD-10-CM L02.237
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L02.237 is a billable ICD-10-CM diagnosis code for carbuncle of flank. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 602 through 603.

Code Identity

ICD-10-CM Code
L02.237
Billable Status
Yes — Valid for Submission
Code Describes
Carbuncle of flank
Short Description
Carbuncle of flank
Same as the full description in the CMS dataset.
Parent Code
L02.23
Carbuncle of trunk

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL00-L08Infections of the skin and subcutaneous tissue
CategoryL02Cutaneous abscess, furuncle and carbuncle
This CodeL02.237Carbuncle of flank

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L02.237: its own notes plus those printed at L02.2, L02, block L00-L08, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From L02.2 Cutaneous abscess, furuncle and carbuncle of trunk applies to 24 codes
  • non-newborn omphalitis (L08.82)
  • omphalitis of newborn (P38.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From L02.2 Cutaneous abscess, furuncle and carbuncle of trunk applies to 24 codes
  • abscess of breast (N61.1)
  • abscess of buttocks (L02.31)
  • abscess of female external genital organs (N76.4)
  • abscess of male external genital organs (N48.2, N49.-)
  • abscess of hip (L02.4)
From L02 Cutaneous abscess, furuncle and carbuncle applies to 81 codes
  • abscess of anus and rectal regions (K61.-)
  • abscess of female genital organs (external) (N76.4)
  • abscess of male genital organs (external) (N48.2, N49.-)
From Block L00-L08 Infections of the skin and subcutaneous tissue applies to 159 codes
  • hordeolum (H00.0)
  • infective dermatitis (L30.3)
  • local infections of skin classified in Chapter 1
  • lupus panniculitis (L93.2)
  • panniculitis NOS (M79.3)
  • panniculitis of neck and back (M54.0-)
  • Perlèche NOS (K13.0)
  • Perlèche due to candidiasis (B37.0)
  • Perlèche due to riboflavin deficiency (E53.0)
  • pyogenic granuloma (L98.0)
  • relapsing panniculitis [Weber-Christian] (M35.6)
  • viral warts (B07.-)
  • zoster (B02.-)
From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • 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.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From L02 Cutaneous abscess, furuncle and carbuncle applies to 81 codes
  • code to identify organism (B95-B96)
From Block L00-L08 Infections of the skin and subcutaneous tissue applies to 159 codes
  • code (B95-B97) to identify infectious agent.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L02.237, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and L02.237 is one of the codes named.

  • T65.84 Toxic effect of xylazine
    cutaneous abscess, furuncle and carbuncle (L02.-) names L02.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Code History & ChangesHistory

New Code L02.237 was added to the ICD-10-CM code set for FY 2027, effective October 1, 2026.

Replacement L02.237 replaces the following previously assigned code(s):

  • L02.232 - Carbuncle of back [any part, except buttock and flank]
  • L02.232 - Carbuncle of back [any part, except buttock]
FY 2027AddedAdded to the ICD-10-CM code setEffective October 1, 2026.
FY 2027CurrentRevised in the current code setEffective October 1, 2026 through September 30, 2027.

Questions About L02.237Overview

What is the ICD-10 code for carbuncle of flank?

The ICD-10-CM code for carbuncle of flank is L02.237 (sometimes written as L02237). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L02.237 (Carbuncle of trunk) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report carbuncle of flank on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L02.237 group to?

When carbuncle of flank is the principal diagnosis on an inpatient stay, it groups to MS-DRG 602, 603, with relative weights from 0.8633 to 1.4272 depending on complications. Higher weights mean higher Medicare reimbursement.

Can L02.237 be reported with L08.82?

Not as a rule. The Excludes1 note at L02.2, which applies to L02.237, lists "non-newborn omphalitis (L08.82)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does L02.237 need an additional code?

When the condition applies, yes. The Use Additional Code note at L02, which applies to L02.237, reads: code to identify organism (B95-B96). The additional code is reported after L02.237.