ICD-10-CM > R00-R99 > R10-R19 > R10 > R10.A R10.A Pain localized to flank Non-Billable/Non-Specific Applicable To Lateral abdomen painLateral flank painLatus region pain Type 2 Excludes pain localized to other parts of lower abdomen (R10.3-)pain localized to upper abdomen (R10.1-) Codes R10.A0Flank pain, unspecified sideR10.A1Flank pain, right sideR10.A2Flank pain, left sideR10.A3Flank pain, bilateral