R59.1 — Generalized enlarged lymph nodes
Is R59.1 billable?
Yes — R59.1 is billable for FY2027. R59.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. R59.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
R59.1 at a glance
| Code | R59.1 |
|---|---|
| Description | Generalized enlarged lymph nodes |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does R59.1 group to?
R59.1 sits in MDC 16 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 814Reticuloendothelial and Immunity Disorders with MCCmedical
- 815Reticuloendothelial and Immunity Disorders with CCmedical
- 816Reticuloendothelial and Immunity Disorders without CC/MCCmedical
How is R59.1 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to R59.1. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Lymphadenopathy (generalized)
- Lymphadenosis
- Adenopathy › generalized (lymph gland)
- Enlargement, enlarged › lymph gland or node › generalized
- Hypertrophy, hypertrophic › gland, glandular › generalized
- Hypertrophy, hypertrophic › lymph, lymphatic gland › generalized
- Swelling › glands › generalized (of)
Inclusion terms
Alternative wording in documentation that is classified to R59.1.
- Lymphadenopathy NOS
Excludes1 — never code together — inherited from R59
The conditions below can never be reported together with R59.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R59.1, but a patient may have both at the same time. When documentation supports it, R59.1 and the excluded code may both be reported.
How long has R59.1 existed?
R59.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.