Alphabetic Index FY2027

I88.9

Nonspecific lymphadenitis, unspecified

FY2027Chapter 9: Diseases of the circulatory system/I80–I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

BillableComplete code, valid to report

I88.9 (also written I889) is a billable ICD-10-CM diagnosis code for nonspecific lymphadenitis, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 4 codes in category I88 (Nonspecific lymphadenitis). The Alphabetic Index lists it under 8 entries. Its coding notes include 3 Excludes1 entries and 10 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from I88 Nonspecific lymphadenitis
  • acute lymphadenitis, except mesenteric (L04.-)
  • enlarged lymph nodes NOS (R59.-)
  • human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
  • 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.-)

Inclusion terms

Conditions classified to this code.

This code
  • Lymphadenitis NOS

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 8 entries