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  6. 2026 ICD-10-CM Code R10.8A9

2026 ICD-10-CM Diagnosis Code R10.8A9

Flank tenderness, unspecified

ICD-10-CM Code:
R10.8A9
ICD-10 Code for:
Flank tenderness, unspecified
Is Billable?
Yes - Valid for Submission
Code Navigator:

R10.8A9 is a billable diagnosis code used to specify a medical diagnosis of flank tenderness, unspecified. 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 R10.8A9 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.

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

R10.8A9 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).

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Flank tenderness NOS

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:

    • Tenderness, abdominal
      • flank

Replacement Code

R108A9 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