Billable / Specific Code
ICD-10-CM I88.9 is the diagnosis code for Nonspecific lymphadenitis, unspecified. 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 billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where I88.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, I88.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
I88.9 is the ICD-10-CM diagnosis code for "Nonspecific lymphadenitis, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of I88.9 is I88 ("Nonspecific lymphadenitis"). I88.9 provides a more specific classification within this category.
I88.9 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.
Use I88.9 when the patients documented diagnosis matches "Nonspecific lymphadenitis, unspecified" 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, unspecified is I88.9.
Yes, I88.9 can be used as a primary diagnosis code since it is billable and specific.
I88.9 is in Chapter 9 of the ICD-10-CM Tabular List.
Yes, I88.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.