Non-Billable / Non-Specific Code
ICD-10-CM I88 is the diagnosis code for Nonspecific lymphadenitis. This code falls under the section "Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified" within Chapter 9 — Diseases of the circulatory system (I00-I99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as I88. They are mutually exclusive:
Understanding where I88 sits in the ICD-10-CM classification helps ensure proper coding:
No, I88 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
I88 is the ICD-10-CM diagnosis code for "Nonspecific lymphadenitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
I88 is located in Section I80-I89 — "Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified" within Chapter 9 of the ICD-10-CM Tabular List.
I88 has 4 sub-code(s) that provide more specific detail: I88.0, I88.1, I88.8, I88.9.
Use I88 when the patients documented diagnosis matches "Nonspecific lymphadenitis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Nonspecific lymphadenitis is I88.
No, I88 is non-billable. Use a more specific sub-code for primary diagnosis billing.
I88 is in Chapter 9 of the ICD-10-CM Tabular List.
Type 1 Excludes for I88 include: acute lymphadenitis, except mesenteric (L04.-); enlarged lymph nodes NOS (R59.-); human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20).
Yes, I88 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.