2026 ICD-10-CM Diagnosis Code R10.A0
Flank pain, unspecified side
- ICD-10-CM Code:
- R10.A0
- ICD-10 Code for:
- Flank pain, unspecified side
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
R10.A0 is a billable diagnosis code used to specify a medical diagnosis of flank pain, unspecified side. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.
Unspecified diagnosis codes like R10.A0 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.
New 2026 ICD-10-CM Code
R10.A0 is new to ICD-10-CM code set for the FY 2026, effective October 1, 2025. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2025. This is a new and revised code for the FY 2026 (October 1, 2025 - September 30, 2026).
Index to Diseases and Injuries References
The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).
Index of External Cause of Injuries
References found for this diagnosis code in the External Cause of Injuries Index:
- Pain(s)
- flank
Replacement Code
R10A0 replaces the following previously assigned ICD-10-CM code(s):
- R10.84 - Generalized abdominal pain
Code History
- FY 2026 - Code Added, effective from 10/1/2025 through 9/30/2026
