ICD-10-CM 2027
ICD-10 code for Costovertebral angle tenderness
From the official ICD-10-CM alphabetic index entry “Tenderness, abdominal › costovertebral (angle)”. Page updated September 29, 2026.
About coding Costovertebral angle tenderness
The ICD-10-CM code for Costovertebral angle tenderness is R39.859 (Costovertebral (angle) tenderness, unspecified side). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R39.859.
Within R39.85, choose R39.859 (unspecified side) only when documentation doesn't support a more specific option: right side (R39.851), left side (R39.852) and bilateral (R39.853).
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 695 (Kidney and Urinary Tract Signs and Symptoms with MCC, relative weight 1.1139) and DRG 696 (Kidney and Urinary Tract Signs and Symptoms without MCC, relative weight 0.6679), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), 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 Costovertebral angle tenderness codes (official index)
Common questions about Costovertebral angle tenderness ICD-10 codes
What is the ICD-10 code for Costovertebral angle tenderness?
- R39.859 — Costovertebral (angle) tenderness, unspecified side. More specific codes apply when the documentation supports them: R39.853, R39.852, R39.851.
What is the ICD-10 code for bilateral costovertebral angle tenderness?
- R39.853 — Costovertebral (angle) tenderness, bilateral.
What is the ICD-10 code for left costovertebral angle tenderness?
- R39.852 — Costovertebral (angle) tenderness, left side.
What is the ICD-10 code for right costovertebral angle tenderness?
- R39.851 — Costovertebral (angle) tenderness, right side.
Is R39.859 billable?
- Yes. R39.859 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R39.859 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R39.859 as a principal diagnosis.
Is R39.859 a CC or MCC?
- No. R39.859 is neither a CC nor an MCC under MS-DRG v44.0.