ICD10BillableValid for clinical use
ICD-10 Code L03.31A: Cellulitis of flank
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).
When is it used?
- May be used when a clinician documents cellulitis of flank in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
12Diseases of the skin and subcutaneous tissue (L00-L99)
block
L00-L08Infections of the skin and subcutaneous tissue
category
L03Cellulitis and acute lymphangitis
category
L03.3Cellulitis and acute lymphangitis of trunk
category
L03.31Cellulitis of trunk
currentL03.31
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Dermatologist
Related codes
L03.311Cellulitis of abdominal wallcodeL03.312Cellulitis of back [any part except buttock]codeL03.313Cellulitis of chest wallcodeL03.314Cellulitis of groincodeL03.315Cellulitis of perineumcodeL03.316Cellulitis of umbilicuscodeL03.317Cellulitis of buttockcodeL03.319Cellulitis of trunk, unspecifiedcode
Sibling codes
L03.311Cellulitis of abdominal wallbillableL03.312Cellulitis of back [any part except buttock]billableL03.313Cellulitis of chest wallbillableL03.314Cellulitis of groinbillableL03.315Cellulitis of perineumbillableL03.316Cellulitis of umbilicusbillableL03.317Cellulitis of buttockbillableL03.319Cellulitis of trunk, unspecifiedbillable
Coverage-related procedures and services
HCPCS G0151high
SERVICES PERFORMED BY A QUALIFIED PHYSICAL THERAPIST IN THE HOME HEALTH OR HOSPICE SETTING, EACH 15 MINUTES
Source: CMS coverage guidance
CPT 74177high
COMPUTED TOMOGRAPHY, ABDOMEN AND PELVIS; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 74176high
COMPUTED TOMOGRAPHY, ABDOMEN AND PELVIS; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 74178high
COMPUTED TOMOGRAPHY, ABDOMEN AND PELVIS; WITHOUT CONTRAST MATERIAL IN ONE OR BOTH BODY REGIONS, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS IN ONE OR BOTH BODY REGIONS
Source: CMS coverage guidance
CPT 74160high
COMPUTED TOMOGRAPHY, ABDOMEN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 74150high
COMPUTED TOMOGRAPHY, ABDOMEN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Cellulitis of flank
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.