Enlarged lymph nodes (R59) ICD-10-CM
The R59 code range covers enlarged lymph nodes with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- swollen glands
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the R59 Range 4 codes · 3 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the R59 range.
Lymphadenopathy
Disease of LYMPH NODES which are abnormal in size, number or consistency.
About the R59 Code Range
Enlarged lymph nodes appear here among general symptoms and signs. The subdivisions distinguish R59.0 for localized enlargement, R59.1 for generalized enlargement, and R59.9 when the enlargement is unspecified.
Questions About This Page
How many billable codes are in the R59 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the R59 range classify?
The range classifies enlarged lymph nodes. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
