R59.1 – Generalized enlarged lymph nodes

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

Billable code

ICD-10-CM code R59.1

Code: R59.1 (claims format: R591)
Description: Generalized enlarged lymph nodes
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: R59

Notes for R59.1

Applicable to:

Lymphadenopathy NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R59 – Enlarged lymph nodes

Includes:

swollen glands

Excludes1 (not coded here):

lymphadenitis NOS (I88.9)
acute lymphadenitis (L04.-)
chronic lymphadenitis (I88.1)
mesenteric (acute) (chronic) lymphadenitis (I88.0)

Index terms for R59.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in R59

R59.0 – Localized enlarged lymph nodesBillable
R59.9 – Enlarged lymph nodes, unspecifiedBillable

Frequently asked questions

What is ICD-10 code R59.1?

R59.1 is the ICD-10-CM code for generalized enlarged lymph nodes, in the block R50-R69 (General symptoms and signs).

Is R59.1 a billable code?

Yes. R59.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R59.1 belong to?

It belongs to category R59 – Enlarged lymph nodes.

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.