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I88

Non-billable

Nonspecific lymphadenitis

I88 is the ICD-10-CM code for Nonspecific lymphadenitis. It is a non-billable category code — use a more specific child code such as I88.0 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
4
Edition
FY2026

I00-I99 Diseases of the circulatory system

What this means — in plain language

MedlinePlus · NIH

The lymphatic system is a network of tissues and organs. It is made up of: Lymph - a fluid that contains white blood cells that defend against germs Lymph vessels - vessels that carry lymph throughout your body. They are different from blood vessels. Lymph nodes - glands found throughout the lymph vessels. Along with your spleen , these nodes are where white blood cells fight infection. Your bone marrow and thymus…

Read more about Lymphatic Diseases at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •acute lymphadenitis, except mesenteric (L04.-)
  • •enlarged lymph nodes NOS (R59.-)
  • •human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20)

Frequently asked questions

What is ICD-10 code I88?
I88 is the ICD-10-CM code for "Nonspecific lymphadenitis". It falls under I00-I99 Diseases of the circulatory system.
Is I88 a billable code?
No — I88 is a non-billable header code. Use a more specific child code (such as I88.0) for billing.
What are the subcodes of I88?
I88 has 4 more specific child codes, including I88.0, I88.1, I88.8.
What is excluded from I88?
Excludes1 (not coded here): acute lymphadenitis, except mesenteric (L04.-); enlarged lymph nodes NOS (R59.-); human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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