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Home / ICD-10-CM / Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) / Symptoms and signs involving the digestive system and abdomen (R10-R19)

R10.A1: Flank pain, right side

ICD-10-CM code R10.A1

New code ยท FY2026

Billable: use this code on claims.

  • New code, effective October 1, 2025 (FY2026).

Code breakdown

R10.A1

  1. R10CategoryAbdominal and pelvic pain
  2. ACharacter 4Pain localized to flank
  3. 1Character 5Flank pain, right side

Coding notes

Inclusion terms (from R10.A)

  • Lateral abdomen pain
  • Lateral flank pain
  • Latus region pain

Excludes2 (from R10.A)

  • pain localized to other parts of lower abdomen (R10.3-)
  • pain localized to upper abdomen (R10.1-)

Excludes1 (from R10)

  • renal colic (N23)

Excludes2 (from R10)

  • costovertebral (angle) tenderness (R39.85)
  • dorsalgia (M54.-)
  • flatulence and related conditions (R14.-)

Medicare coverage

R10.A1 is listed as a covered diagnosis in 4 Medicare billing and coding articles:

  • A55028 Billing and Coding: Lab: Bladder/Urothelial Tumor Markers
  • A55336 Billing and Coding: Retroperitoneal Ultrasound
  • A56421 Billing and Coding: CT of the Abdomen and Pelvis
  • A57591 Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies

Check this code

All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.