Is ICD-10-CM code I88 billable?

No, I88 (Nonspecific lymphadenitis) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code I88 belong to?

I88 belongs to Chapter 9 of the ICD-10-CM tabular list: I00–I99 (Diseases of the Circulatory System).

I88

Non-Billable

ChapterI00–I99

Rankcategory

Description

Nonspecific lymphadenitis

About ICD-10-CM code I88

Under I00-I99 Diseases of the Circulatory System, within Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89), ICD-10-CM code I88 describes Nonspecific lymphadenitis. This code cannot be billed directly because more specific child codes exist beneath it.

Use a more specific code (4 billable)

I88.0Nonspecific mesenteric lymphadenitis I88.1Chronic lymphadenitis, except mesenteric I88.8Other nonspecific lymphadenitis I88.9Nonspecific lymphadenitis, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

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

Clinical Hierarchy

BillableHas subcodes

CH9Diseases of the circulatory system (I00-I99)

I80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

I88Nonspecific lymphadenitisNot billable

I88.0Nonspecific mesenteric lymphadenitisBillable

I88.1Chronic lymphadenitis, except mesentericBillable

I88.8Other nonspecific lymphadenitisBillable

I88.9Nonspecific lymphadenitis, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I88:

chapterCH9

Diseases of the circulatory system (I00-I99)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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