R59 – Enlarged lymph nodes

ICD-10-CM 2027 diagnosis code · General symptoms and signs

Non-billable header

ICD-10-CM code R59
Code
R59 (claims format: R59)
Description
Enlarged lymph nodes
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block
R50-R69 General symptoms and signs

Billable codes under R59

R59 is a header code and cannot be used on claims. Choose the most specific code:

Notes for R59

Includes:
  • swollen glands
Excludes1 (not coded here):
  • lymphadenitis NOS (I88.9)
  • acute lymphadenitis (L04.-)
  • chronic lymphadenitis (I88.1)
  • mesenteric (acute) (chronic) lymphadenitis (I88.0)

Frequently asked questions

What is ICD-10 code R59?

R59 is the ICD-10-CM code for enlarged lymph nodes, in the block R50-R69 (General symptoms and signs).

Is R59 a billable code?

No. R59 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.