ICD-10 Code for Abdominal Pain
Abdominal pain is one of those complaints where the code you pick depends entirely on where the pain actually is — and that’s not a technicality, it’s the whole point. R10.9 (unspecified abdominal pain) exists, but it’s rarely the right choice, because a physical exam almost always locates the pain to a specific quadrant or region, and ICD-10 has a code for exactly that.
Right lower quadrant pain reads very differently to a payer than left upper quadrant pain — one raises the question of appendicitis, the other doesn’t. Coding to the quadrant instead of defaulting to “unspecified” isn’t just more accurate, it does a better job of explaining why you ordered the imaging or labs you ordered.
FY 2027 ICD-10-CM (CMS, eff. 10/1/2026) · CPT 2026 (AMA) · Last verified: October 2026
Quick Answer
Unspecified abdominal pain
There’s no single ‘abdominal pain’ code — ICD-10 splits it by location. R10.9 (unspecified) is billable but should be a last resort; use the quadrant-specific code your exam actually supports.
🔍 Search Codes on This Page
ICD-10 Code for Abdominal Pain: Full Code List and Related Diagnoses
CPT Codes Commonly Billed With This Diagnosis
*Approximate 2026 CMS national non-facility rate. Lab test rates are from the 2026 CMS Clinical Laboratory Fee Schedule. Rates vary by geography, setting, and payer contract. Refer to the CMS Physician Fee Schedule for official rates.
Which Medical Specialty Handles This?
Where the workup goes depends heavily on which quadrant is involved and what else is in the picture. Persistent or recurring abdominal pain, especially with digestive symptoms, is usually managed in gastroenterology. Sudden, severe pain — particularly right lower quadrant pain in a patient who has never had it before — gets triaged through urgent care or the ED to rule out a surgical abdomen before anyone else gets involved. In children, the same complaint is usually coded and managed under pediatrics, and in pregnant patients it's evaluated through OB/GYN first.
Common Billing & Documentation Mistakes
Unspecified Code Used When the Exam Documents a Location
If the note says 'tenderness in the right lower quadrant' but the claim uses R10.9, payers may question why R10.31 wasn’t used. Code to the location the exam actually supports.
Imaging Ordered Without a Documented Exam Finding to Justify It
CT abdomen/pelvis (74176/74177) needs a clear link in the note between the pain’s characteristics and why imaging — rather than watchful waiting — was medically necessary.
Generalized Pain Code Used for a Clearly Localized Complaint
R10.84 (generalized) should describe pain that’s genuinely diffuse, not be used as a default when the location just wasn’t documented carefully.
Repeat Visits for the Same Complaint Without an Updated Assessment
Multiple visits coded identically for ongoing abdominal pain, without documentation of what’s changed or what’s been ruled out, can read as a lack of clinical progress to a reviewer.
Coding Tips
- Always document quadrant or region when the exam supports it — R10.31 (RLQ) tells a much clearer clinical story than R10.9 and is less likely to draw a specificity query.
- Reserve R10.84 (generalized) for pain that’s genuinely diffuse across the abdomen, not as a substitute for a location you didn’t document.
- Pair imaging orders with a clear one-line medical necessity statement in the note — 'RLQ pain, rule out appendicitis' does more for the claim than the imaging order alone.
- In pediatric and pregnant patients, cross-reference the Pediatrics and OB/GYN coding guides — abdominal pain is coded and triaged differently in both populations.
Related Resources
Full Specialty Coding Guides
This symptom appears across several specialties. See the full billing reference for each.
Frequently Asked Questions
Document Location and Character, Not Just ‘Pain’
OmniMD’s exam templates prompt for the details that turn a vague complaint into a specific, defensible code.