ICD-10-CM R59 is the diagnosis code for Enlarged lymph nodes. This code falls under the section "General symptoms and signs" within Chapter 18 — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as R59. They are mutually exclusive:
Understanding where R59 sits in the ICD-10-CM classification helps ensure proper coding:
No, R59 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
R59 is the ICD-10-CM diagnosis code for "Enlarged lymph nodes". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
R59 is located in Section R50-R69 — "General symptoms and signs" within Chapter 18 of the ICD-10-CM Tabular List.
R59 has 3 sub-code(s) that provide more specific detail: R59.0, R59.1, R59.9.
Use R59 when the patients documented diagnosis matches "Enlarged lymph nodes" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Enlarged lymph nodes is R59.
No, R59 is non-billable. Use a more specific sub-code for primary diagnosis billing.
R59 is in Chapter 18 of the ICD-10-CM Tabular List.
Type 1 Excludes for R59 include: lymphadenitis NOS (I88.9); acute lymphadenitis (L04.-); chronic lymphadenitis (I88.1) and more.
Yes, R59 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.