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).

I88Not billable, use a more specific code below

Nonspecific lymphadenitis

In Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89), chapter 9: Diseases of the Circulatory System

4 billable codes under I88: none are a CC or MCC; none map to an HCC.

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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers hypertension with heart and kidney disease, coronary artery disease with angina, perioperative stroke, cerebrovascular sequelae, and acute myocardial infarction types and timing.

Hypertension (page 50)
Atherosclerotic Coronary Artery Disease and Angina (page 52)
Intraoperative and Postprocedural Cerebrovascular Accident (page 53)
Sequelae of Cerebrovascular Disease (page 53)
Acute myocardial infarction (AMI) (page 54)

Read Section I.C.9 (page 50)

All codes under I88

I88 can't be used on a claim. Pick a billable code below; grey headings group them.

I88 MS-DRGs

As the principal diagnosis, the billable codes under I88 group to MS-DRG 814, 815, 816, 393, 394, or 395 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 814 Reticuloendothelial and Immunity Disorders with MCC (3 of 4 codes)
DRG 815 Reticuloendothelial and Immunity Disorders with CC (3 of 4 codes)
DRG 816 Reticuloendothelial and Immunity Disorders without CC/MCC (3 of 4 codes)
DRG 393 Other Digestive System Diagnoses with MCC (1 of 4 codes)
DRG 394 Other Digestive System Diagnoses with CC (1 of 4 codes)
DRG 395 Other Digestive System Diagnoses without CC/MCC (1 of 4 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Lymphatic Diseases

The lymphatic system is a network of tissues and organs. It is made up of: Your bone marrow and thymus produce the cells in lymph. They are part of the system, too.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.