ICD10BillableValid for clinical use

ICD-10 Code L53.9: Erythematous condition, unspecified

L53.9 is a billable ICD-10 diagnosis code used to classify Erythematous condition, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. 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).

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 erythematous condition, unspecified 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
L49-L54Urticaria and erythema
category
L53Other erythematous conditions
currentL53

Official coding notes

Inclusion terms
  • Erythema NOS
  • Erythroderma NOS

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

DermatologistHematologist

Coverage-related procedures and services

CPT 93985high
DUPLEX SCAN OF ARTERIAL INFLOW AND VENOUS OUTFLOW FOR PREOPERATIVE VESSEL ASSESSMENT PRIOR TO CREATION OF HEMODIALYSIS ACCESS; COMPLETE BILATERAL STUDY
Source: CMS coverage guidance
CPT 93986high
DUPLEX SCAN OF ARTERIAL INFLOW AND VENOUS OUTFLOW FOR PREOPERATIVE VESSEL ASSESSMENT PRIOR TO CREATION OF HEMODIALYSIS ACCESS; COMPLETE UNILATERAL STUDY
Source: CMS coverage guidance
CPT 93970high
DUPLEX SCAN OF EXTREMITY VEINS INCLUDING RESPONSES TO COMPRESSION AND OTHER MANEUVERS; COMPLETE BILATERAL STUDY
Source: CMS coverage guidance
CPT 93971high
DUPLEX SCAN OF EXTREMITY VEINS INCLUDING RESPONSES TO COMPRESSION AND OTHER MANEUVERS; UNILATERAL OR LIMITED STUDY
Source: CMS coverage guidance
CPT 93990high
DUPLEX SCAN OF HEMODIALYSIS ACCESS (INCLUDING ARTERIAL INFLOW, BODY OF ACCESS AND VENOUS OUTFLOW)
Source: CMS coverage guidance
CPT 88182high
FLOW CYTOMETRY, CELL CYCLE OR DNA ANALYSIS
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
L53.9

Common synonyms

Erythematous condition, unspecifiedErythematous condition

Frequently asked questions

Code details

CodeL53.9
SystemICD10
Display nameErythematous condition, unspecified
ChapterDiseases of the skin and subcutaneous tissue (L00-L99)
BlockUrticaria and erythema

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Erythema, erythematous(infectional) (inflammation)Erythroderma(secondary)
See also
Erythema

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.

ICD-10 Code L53.9 for Erythematous condition, unspecified | HealthAssure