2027 ICD-10-CM Diagnosis Code R39.859Costovertebral (angle) tenderness, unspecified side
ICD-10-CM Codes›R00–R99›R30-R39›R39
- Billable — Valid for Submission
- Not Chronic
R39.859 is a billable ICD-10-CM diagnosis code for costovertebral (angle) tenderness, unspecified side. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 695 through 696. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary signs and symptoms.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to R39.859: its own notes plus those printed at R39.85 and Chapter 18. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name R39.859, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming R39.859: its condition is not part of those codes, and both may be reported when the patient has both.
- R10 Abdominal and pelvic paincostovertebral (angle) tenderness (R39.85) names R39.85, which includes this code
- Block R10-R19 Symptoms and signs involving the digestive system and abdomen
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Pain
Pain is a signal in your nervous system that something may be wrong. It is an unpleasant feeling, such as a prick, tingle, sting, burn, or ache. Each person feels pain differently, even if the reason for the pain is the same. Pain may be sharp or dull. It may be mild or severe. Pain may come and go, or it may be constant.
The full article covers:
- What is pain?
- What are the types of pain?
- What causes pain?
- How is pain diagnosed?
- What are the treatments for pain?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code History & ChangesHistory
Replacement R39.859 replaces the following previously assigned code(s):
- R39.89 - Other symptoms and signs involving the genitourinary system
Questions About R39.859Overview
What is the ICD-10 code for costovertebral (angle) tenderness, unspecified side?
The ICD-10-CM code for costovertebral (angle) tenderness, unspecified side is R39.859 (sometimes written as R39859). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is R39.859 (Costovertebral (angle) tenderness) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report costovertebral (angle) tenderness, unspecified side on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does R39.859 group to?
When costovertebral (angle) tenderness, unspecified side is the principal diagnosis on an inpatient stay, it groups to MS-DRG 696, 695, with relative weights from 0.6677 to 1.1136 depending on complications. Higher weights mean higher Medicare reimbursement.
Can R39.859 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the costovertebral (angle) tenderness, unspecified side is established, that condition takes the principal position instead.
