R59.0 — Localized enlarged lymph nodes
R59.0 is a billable, specific ICD-10-CM code for localized enlarged lymph nodes. It is valid for submission on a claim.
Risk adjustment
R59.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
R59.0 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55717Billing and Coding: Lab: Flow Cytometry
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56448Billing and Coding: Breast Imaging Mammography/Breast Echography (Sonography)/Breast MRI/Ductography
- A56464Billing and Coding: Flow Cytometry
How R59.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R59.0.
- Adenopathy›inguinal
- Adenopathy›localized
- Adenopathy›mediastinal
- Adenopathy›mesentery
- Adenopathy›tracheobronchial
- Hyperplasia, hyperplastic›cervical gland
- Hypertrophy, hypertrophic›hilus gland
- Lymphadenopathy›localized
- Swelling›cervical gland
- Enlargement, enlarged›lymph gland or node›localized
- Hypertrophy, hypertrophic›gland, glandular›localized
- Hypertrophy, hypertrophic›lymph, lymphatic gland›localized
Related codes at this level
Codes that share R59. If R59.0 is not quite right, the correct code is usually one of these.
Questions about R59.0
- Is R59.0 a billable ICD-10-CM code?
- Yes. R59.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R59.0 sit in the tabular list?
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block General symptoms and signs (R50-R69).