2026 ICD-10-CM Diagnosis Code I88Nonspecific lymphadenitis

ICD-10-CM Codes›I00–I99›I80-I89›I88

ICD-10-CM I88
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I88 is a non-billable ICD-10-CM category code for nonspecific lymphadenitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I88.0, I88.1, I88.8, and I88.9.

Code Identity

ICD-10-CM Code
I88
Billable Status
No — Non-Billable Category
Code Describes
Nonspecific lymphadenitis
Short Description
Nonspecific lymphadenitis
Same as the full description in the CMS dataset.
Chapter
I80-I89
Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
CategoryI88Nonspecific lymphadenitis
This CodeI88Nonspecific lymphadenitis

Specific Coding for Nonspecific lymphadenitisOverview

Non-specific codes like I88 require more characters. Use one of these billable codes instead:

  • Use I88.0 for Nonspecific mesenteric lymphadenitis

  • Use I88.1 for Chronic lymphadenitis, except mesenteric

  • Use I88.8 for Other nonspecific lymphadenitis

  • Use I88.9 for Nonspecific lymphadenitis, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • acute lymphadenitis, except mesenteric L04
  • enlarged lymph nodes NOS R59
  • human immunodeficiency virus HIV disease resulting in generalized lymphadenopathy B20

Patient EducationClinical

Lymphatic Diseases

The lymphatic system is a network of tissues and organs. It is made up of:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I88Overview

Is I88 (Nonspecific lymphadenitis) a billable code?

No. This is a category header that groups the codes for nonspecific lymphadenitis, and headers cannot be submitted on claims. Claims for nonspecific lymphadenitis need a more specific code from this category, such as I88.0, I88.1, and I88.8.