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  6. 2026 ICD-10-CM Code R10.A2

2026 ICD-10-CM Diagnosis Code R10.A2

Flank pain, left side

ICD-10-CM Code:
R10.A2
ICD-10 Code for:
Flank pain, left side
Is Billable?
Yes - Valid for Submission
Code Navigator:

R10.A2 is a billable diagnosis code used to specify a medical diagnosis of flank pain, left 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.

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.

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    R00–R99
    • Symptoms and signs involving the digestive system and abdomen
      R10-R19
      • Abdominal and pelvic pain
        R10

New 2026 ICD-10-CM Code

R10.A2 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
        • left

Replacement Code

R10A2 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