ICD10BillableValid for clinical use
ICD-10 Code I88.9: Nonspecific lymphadenitis, unspecified
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 circulatory system (I00-I99).
When is it used?
- May be used when a clinician documents nonspecific lymphadenitis, 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
9Diseases of the circulatory system (I00-I99)
block
I80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
category
I88Nonspecific lymphadenitis
currentI88
Official coding notes
Inclusion terms
- Lymphadenitis 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
CardiologistGeneral Physician
Related codes
Sibling codes
Coverage-related procedures and services
CPT 88182high
FLOW CYTOMETRY, CELL CYCLE OR DNA ANALYSIS
Source: CMS coverage guidance
CPT 88185high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; EACH ADDITIONAL MARKER (LIST SEPARATELY IN ADDITION TO CODE FOR FIRST MARKER)
Source: CMS coverage guidance
CPT 88184high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; FIRST MARKER
Source: CMS coverage guidance
CPT 88189high
FLOW CYTOMETRY, INTERPRETATION; 16 OR MORE MARKERS
Source: CMS coverage guidance
CPT 88187high
FLOW CYTOMETRY, INTERPRETATION; 2 TO 8 MARKERS
Source: CMS coverage guidance
CPT 88188high
FLOW CYTOMETRY, INTERPRETATION; 9 TO 15 MARKERS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 1204221007high
Acute inflammation of retroperitoneal lymph node
Source: SNOMED International ICD-10 map
SNOMED_CT 1204159006high
Acute mediastinal lymphadenitis
Source: SNOMED International ICD-10 map
SNOMED_CT 426874006high
Adenolymphangitis
Source: SNOMED International ICD-10 map
SNOMED_CT 3502005high
Cervical lymphadenitis
Source: SNOMED International ICD-10 map
SNOMED_CT 19471005high
Lymphadenitis
Source: SNOMED International ICD-10 map
SNOMED_CT 1235004000high
Lymphadenitis caused by Toxoplasma gondii
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
I88.9
Common synonyms
Nonspecific lymphadenitis, unspecifiedNonspecific lymphadenitis
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.