ICD-10-CM 2027
ICD-10 code for rheumatoid nodule
From the official ICD-10-CM alphabetic index entry “Nodule (s), nodular › rheumatoid”. Page updated September 29, 2026.
About coding rheumatoid nodule
The ICD-10-CM code for rheumatoid nodule is M06.30 (Rheumatoid nodule, unspecified site). The official index lists 10 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M06.30.
Within M06.3, choose M06.30 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M06.31), elbow (M06.32), wrist (M06.33), hand (M06.34), hip (M06.35), knee (M06.36), ankle and foot (M06.37), vertebrae (M06.38) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific rheumatoid nodule codes (official index)
- ankle M06.37 — Rheumatoid nodule, ankle and foot
- elbow M06.32 — Rheumatoid nodule, elbow
- foot joint M06.37 — Rheumatoid nodule, ankle and foot
- hand joint M06.34 — Rheumatoid nodule, hand
- hip M06.35 — Rheumatoid nodule, hip
- knee M06.36 — Rheumatoid nodule, knee
- multiple site M06.39 — Rheumatoid nodule, multiple sites
- shoulder M06.31 — Rheumatoid nodule, shoulder
- vertebra M06.38 — Rheumatoid nodule, vertebrae
- wrist M06.33 — Rheumatoid nodule, wrist
Common questions about rheumatoid nodule ICD-10 codes
What is the ICD-10 code for rheumatoid nodule?
- M06.30 — Rheumatoid nodule, unspecified site. More specific codes apply when the documentation supports them: M06.37, M06.32, M06.37, M06.34 and others below.
What is the ICD-10 code for ankle rheumatoid nodule?
- M06.37 — Rheumatoid nodule, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for elbow rheumatoid nodule?
- M06.32 — Rheumatoid nodule, elbow (header code; choose a more specific subcode).
What is the ICD-10 code for foot joint rheumatoid nodule?
- M06.37 — Rheumatoid nodule, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for hand joint rheumatoid nodule?
- M06.34 — Rheumatoid nodule, hand (header code; choose a more specific subcode).
What is the ICD-10 code for hip rheumatoid nodule?
- M06.35 — Rheumatoid nodule, hip (header code; choose a more specific subcode).
What is the ICD-10 code for knee rheumatoid nodule?
- M06.36 — Rheumatoid nodule, knee (header code; choose a more specific subcode).
Is M06.30 billable?
- Yes. M06.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M06.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M06.30 as a principal diagnosis.
Is M06.30 a CC or MCC?
- No. M06.30 is neither a CC nor an MCC under MS-DRG v44.0.