ICD-10 Code for Lymphadenopathy

Also indexed as (generalized)

The ICD-10-CM code for lymphadenopathy is R59.1 — Generalized enlarged lymph nodes. This is the code the Alphabetic Index gives for lymphadenopathy with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

Billable

Which lymphadenopathy code should you use?

The Alphabetic Index lists 6 codes under Lymphadenopathy. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

angioimmunoblastic, with dysproteinemia	C86.5	Angioimmunoblastic T-cell lymphoma	not billable
due to toxoplasmosis	B58.89	Toxoplasmosis with other organ involvement
localized	R59.0	Localized enlarged lymph nodes
syphilitic	A51.49	Other secondary syphilitic conditions

Lymphadenopathy due to toxoplasmosis

congenital

P37.1

Congenital toxoplasmosis

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources