Skip to content
Dx

ICD-10-CM 2027 diagnosis code

R39.851Costovertebral (angle) tenderness, right side

✓ Billable / specific

R39.851 is a valid, billable ICD-10-CM code for costovertebral (angle) tenderness, right side. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R39.851

R39.851 is the ICD-10-CM diagnosis code for Costovertebral (angle) tenderness, right side. It belongs to category R39 (other and unspecified symptoms and signs involving the genitourinary system), block R30-R39 (symptoms and signs involving the genitourinary system) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R39.85 (Costovertebral (angle) tenderness), R39.851 is specifically for Costovertebral (angle) tenderness, right side. Related codes cover left side (R39.852), bilateral (R39.853) and unspecified side (R39.859).

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.

It was added in FY2026, effective October 1, 2025.

Notes that apply from higher levels

Instructions written at a parent level also apply to R39.851.

› From R39.85 Costovertebral (angle) tenderness
Excludes2
  • abdominal and pelvic pain (R10.-)

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to R39.851.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about R39.851

Is R39.851 billable?

Yes. R39.851 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R39.851 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R39.851 as a principal diagnosis.

Is R39.851 a CC or MCC?

No. R39.851 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R39.851 group to?

R39.851 is used in the MS-DRG v44.0 logic for MS-DRG 695 (Kidney and Urinary Tract Signs and Symptoms with MCC) and MS-DRG 696 (Kidney and Urinary Tract Signs and Symptoms without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.