R10.A1 — Flank pain, right side
R10.A1 is a billable, specific ICD-10-CM code for flank pain, right side. It is valid for submission on a claim.
Excludes1 inherited from the categories above R10.A1
These are not written on R10.A1, but they bind it: a note on a category applies to every code beneath it. Billing R10.A1 with anything listed here is a denial.
Excludes2 inherited from the categories above R10.A1
Also inherited, and the opposite of Excludes1: these conditions are not part of R10.A1, but a patient can have both, so you may code both.
Written on R10.A — Pain localized to flank
Other codes that can never be billed with R10.A1
These codes carry an Excludes1 note pointing at R10.A1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R10.A1 alone.
- R52Pain, unspecified
Risk adjustment
R10.A1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
R10.A1 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55028Billing and Coding: Lab: Bladder/Urothelial Tumor Markers
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A57591Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies
How R10.A1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R10.A1.
- Pain›flank›right
The condition this code belongs to
Every code for the condition on one page, which one applies when, and the mistake coders make with it.
Code history
What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.
- addedFY2024-FY2026
Flank pain, right side
Related codes at this level
Codes that share R10.A. If R10.A1 is not quite right, the correct code is usually one of these.
Questions about R10.A1
- Is R10.A1 a billable ICD-10-CM code?
- Yes. R10.A1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does R10.A1 sit in the tabular list?
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the digestive system and abdomen (R10-R19).
- What cannot be coded together with R10.A1?
- R10.A1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above R10.A1 (R10) and apply to it just the same.