ICD-10-CM
ICD-10 code for Swollen lymph nodes: R59.9
The CDC title for "Swollen lymph nodes" is R59 (Enlarged lymph nodes), a header that is not billable. When nothing more specific is documented, the billable code is R59.9, Enlarged lymph nodes, unspecified.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under R59, then other CDC titles that name enlarged lymph nodes
A header groups codes and is not billed. A billable code is one you can report.
Excludes1
Excludes1 means these codes are not reported together.
From R59. A note on a category applies to every code under it.
Related conditions
Related pages
- R59.9 code detailsNotes, nearby codes, CMS-HCC group
- Category R59Every code under it
- Chapter 18Symptoms, signs and abnormal clinical findings
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Swollen lymph nodes?
The CDC title for "Swollen lymph nodes" is R59 (Enlarged lymph nodes), a header that is not billable. When nothing more specific is documented, the billable code is R59.9, Enlarged lymph nodes, unspecified.
Is R59.9 billable?
Yes. R59.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to R59.9?
The CDC tabular list gives 4 Excludes1 notes (not coded together) for R59.9 and the categories above it. They are listed on this page.
What chapter is R59.9 in?
Chapter 18. Symptoms, signs and abnormal clinical findings.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.