Abdominal pain ICD-10 code
The ICD-10-CM code for abdominal pain is R10.9 (unspecified abdominal pain). It is billable and valid for submission on a claim. There are 16 related codes, and which one you use depends on what the documentation supports.
The mistake coders make here
R10.9 (unspecified) is the default reach, but ICD-10-CM has a code for every quadrant. If the chart localizes the pain at all, a quadrant code is more specific and less likely to be questioned.
Putting abdominal pain on a claim? Check the claim’s diagnosis codes free: Excludes1 conflicts, header codes and missing seventh characters, before it goes out.
ICD-10-CM codes for abdominal pain
13 of 16 are billable. Green means you can submit it as-is.
| Code | Use it when |
|---|---|
| R10.9 | Unspecified abdominal pain |
| R10.84 | Generalized abdominal pain |
| R10.11 | Right upper quadrant pain |
| R10.12 | Left upper quadrant pain |
| R10.13 | Epigastric pain |
| R10.31 | Right lower quadrant pain |
| R10.32 | Left lower quadrant pain |
| R10.33 | Periumbilical pain |
| R10 | Abdominal and pelvic painnot billable on its own |
| R10.8 | Other abdominal painnot billable on its own |
| R10.85 | Abdominal pain of multiple sites |
| R10.10 | Upper abdominal pain, unspecified |
| R10.30 | Lower abdominal pain, unspecified |
| R10.82 | Rebound abdominal tendernessnot billable on its own |
| R10.816 | Epigastric abdominal tenderness |
| R10.815 | Periumbilic abdominal tenderness |
Once you have the code
- Check the whole claim: Excludes1 conflicts and missing seventh characters, free
- Denial codes explained: what CO-16, CO-97 and the rest actually mean
- Decision guides: walk a chart note to a code, guideline cited
- Everything here that is free, and the one thing no free tool includes
Quadrant first, then everything else
R10 is organized by where it hurts. R10.1- is upper abdominal pain (R10.11 right upper quadrant, R10.12 left upper quadrant, R10.13 epigastric, R10.10 unspecified upper), R10.3- is lower (R10.31 right lower quadrant, R10.32 left lower quadrant, R10.33 periumbilical, R10.30 unspecified lower), R10.2 is pelvic and perineal pain, and R10.84 is generalised abdominal pain. R10.9 is for pain the chart does not localize at all. If the note says 'RLQ tenderness' the answer is not R10.9, and note that R10.81- (abdominal tenderness) and R10.82 (rebound tenderness) are separate codes from pain, so a chart that documents both pain and rebound supports both.
When the symptom code comes off the claim
R10.- is a symptom code, and the Official Guidelines (Section I.B.4 and I.C.18.a) are clear that signs and symptoms routinely associated with a confirmed diagnosis are not coded alongside it. Once the workup ends in appendicitis, cholecystitis or diverticulitis, that condition is coded and the abdominal pain is dropped. The symptom stays only when the pain is not explained by the diagnosis, or when no diagnosis is reached. The setting matters too: in the outpatient setting a 'rule out' or 'probable' diagnosis is never coded (Section IV.H), so an ED visit that ends without a confirmed cause is coded to the pain, not the suspected disease.
Acute abdomen and colic are their own codes
R10.0 is acute abdomen (severe abdominal pain with rigidity, documented as such) and it is not the same as 'acute abdominal pain', which is coded by location like any other pain. R10.83 is colic, used for infantile colic and for colicky abdominal pain a provider documents as such in an adult; renal colic is N23 and biliary colic sits with the gallstone code. Functional abdominal pain in a child is coded to R10.-, not to an IBS code, unless the provider names the syndrome.
Common questions
- What is the ICD-10 code for generalised abdominal pain?
- R10.84, generalized abdominal pain. It is billable. Use it when the chart describes the pain as generalised or diffuse; if the chart names a quadrant, use the quadrant code instead, and if it says nothing about location at all, R10.9.
- What is the ICD-10 code for right lower quadrant pain?
- R10.31. Left lower quadrant is R10.32, periumbilical is R10.33, right upper quadrant R10.11, left upper quadrant R10.12, and epigastric R10.13. All are billable.
- Do I still code abdominal pain when appendicitis is confirmed?
- No. Pain is a symptom integral to appendicitis, so once the diagnosis is confirmed you code the appendicitis (K35.-) and leave the R10 code off. Keep the symptom code only when the pain is not explained by the confirmed condition, or when the encounter ends without a diagnosis.