NPI Atlas

I88 – Nonspecific lymphadenitis

ICD-10-CM 2027 diagnosis code · Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Non-billable header

ICD-10-CM code I88

Code: I88 (claims format: I88)
Description: Nonspecific lymphadenitis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I80-I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Billable codes under I88

I88 is a header code and cannot be used on claims. Choose the most specific code:

I88.0 – Nonspecific mesenteric lymphadenitisBillable
I88.1 – Chronic lymphadenitis, except mesentericBillable
I88.8 – Other nonspecific lymphadenitisBillable
I88.9 – Nonspecific lymphadenitis, unspecifiedBillable

Notes for 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)

Frequently asked questions

What is ICD-10 code I88?

I88 is the ICD-10-CM code for nonspecific lymphadenitis, in the block I80-I89 (Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified).

Is I88 a billable code?

No. I88 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.