2027 ICD-10-CM Diagnosis Code N23Unspecified renal colic
ICD-10-CM Codes›N00–N99›N20-N23›N23
- Billable — Valid for Submission
- Not Chronic
N23 is a billable ICD-10-CM diagnosis code for unspecified renal colic. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 693 through 694. Coders also document this condition as finding of sensation of kidney. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of kidney and ureters.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Finding of sensation of kidney
- Renal angle pain
- Renal colic
- Renal pain
- Tenderness of kidney
- Ureteric colic
- Ureteric pain
- Urinary tract tenderness
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N23: its own notes plus those printed at Chapter 14. 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.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N23, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming N23: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming N23: its condition is not part of those codes, and both may be reported when the patient has both.
- G89 Pain, not elsewhere classifiedrenal colic (N23)
- Block N25-N29 Other disorders of kidney and ureter
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Nephralgia N23
Ureteralgia N23
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Kidney Stones
A kidney stone is a solid piece of material that forms in the kidney from substances in the urine. It may be as small as a grain of sand or as large as a pearl. Most kidney stones pass out of the body without help from a doctor. But sometimes a stone will not go away.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N23 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N23Overview
What is the ICD-10 code for unspecified renal colic?
The ICD-10-CM code for unspecified renal colic is N23. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N23 (Unspecified renal colic) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified renal colic on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N23 group to?
When unspecified renal colic is the principal diagnosis on an inpatient stay, it groups to MS-DRG 694, 693, with relative weights from 0.7815 to 1.3155 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of N23?
Under the General Equivalence Mappings, unspecified renal colic converts to ICD-9-CM 788.0 (renal colic). The mapping is a direct match.
