Is I88 a billable ICD-10-CM code?

No. I88 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I88 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89).

What cannot be coded together with I88?

I88 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I88

I88 — Nonspecific lymphadenitis

Non-billable headerICD-10-CM

I88 is a non-billable header ICD-10-CM code for nonspecific lymphadenitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Other codes that can never be billed with I88

These codes carry an Excludes1 note pointing at I88. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I88 alone.

L04Acute lymphadenitis
R59Enlarged lymph nodes

Risk adjustment

I88 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead I88

4 child codes. Green means billable.

Questions about I88

Is I88 a billable ICD-10-CM code?: No. I88 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I88 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89).
What cannot be coded together with I88?: I88 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.