R10.A0 Flank pain, unspecified side

Billable ICD-10-CM code, FY2026.

Applies from R10 Abdominal and pelvic pain

Excludes1 (never code together)

• renal colic (N23)

Excludes2 (not included here)

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

Applies from R10.A Pain localized to flank

Applicable to

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

Excludes2 (not included here)

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

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Code annotations containing back-references to R10.A0

Back-references to R10.A

• Type 2 Excludes: R10.1 Pain localized to upper abdomen ("pain localized to flank (R10.A-)")
• Type 2 Excludes: R10.3 Pain localized to other parts of lower abdomen ("pain localized to flank (R10.A-)")

Back-references to R10

• Type 2 Excludes: G89 Pain, not elsewhere classified ("abdomen pain (R10.-)")
• Type 2 Excludes: R39.85 Costovertebral (angle) tenderness ("abdominal and pelvic pain (R10.-)")
• Type 1 Excludes: R52 Pain, unspecified ("abdomen pain (R10.-)")

Diagnosis Index entries for R10.A0

• Pain (s) › flank

Nearby codes

• R10.8A2 Left flank tenderness
• R10.8A3 Suprapubic tenderness
• R10.8A9 Flank tenderness, unspecified
• R10.9 Unspecified abdominal pain
• R10.A Pain localized to flank
• R10.A0 Flank pain, unspecified side (this code)
• R10.A1 Flank pain, right side
• R10.A2 Flank pain, left side
• R10.A3 Flank pain, bilateral