Is ICD-10-CM code R59 billable?

No, R59 (Enlarged lymph nodes) 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 R59 belong to?

R59 belongs to Chapter 18 of the ICD-10-CM tabular list: R00–R99 (Symptoms, Signs and Abnormal Clinical and Laboratory Findings).

R59

Non-Billable

ChapterR00–R99

Rankcategory

Description

Enlarged lymph nodes

About ICD-10-CM code R59

R59 is the ICD-10-CM diagnosis code for Enlarged lymph nodes. It sits in R00-R99 Symptoms, Signs and Abnormal Clinical and Laboratory Findings, within General symptoms and signs (R50-R69). R59 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (3 billable)

R59.0Localized enlarged lymph nodes R59.1Generalized enlarged lymph nodes R59.9Enlarged lymph nodes, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

CH18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

Instructional Notes

Includes

swollen glands

Excludes1(Not coded here. Use a different code.)

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

Clinical Hierarchy

BillableHas subcodes

CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

R50-R69General symptoms and signs (R50-R69)

R59Enlarged lymph nodesNot billable

R59.0Localized enlarged lymph nodesBillable

R59.1Generalized enlarged lymph nodesBillable

R59.9Enlarged lymph nodes, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R59:

chapterCH18

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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