2026 ICD-10-CM Diagnosis Code R10.9Unspecified abdominal pain

ICD-10-CM Codes›R00–R99›R10-R19›R10

ICD-10-CM R10.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R10.9 is a billable ICD-10-CM diagnosis code for unspecified abdominal pain. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abdominal pain and other digestive/abdomen signs and symptoms.

This medical diagnosis code is frequently used in Family Practice, Internal Medicine, and Pediatrics medical specialties to designate conditions such abdominal pain.

Code Identity

ICD-10-CM Code
R10.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified abdominal pain
Short Description
Unspecified abdominal pain
Same as the full description in the CMS dataset.
Parent Code
R10
Abdominal and pelvic pain

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR10-R19Symptoms and signs involving the digestive system and abdomen
CategoryR10Abdominal and pelvic pain
This CodeR10.9Unspecified abdominal pain

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abdominal discomfort
  • Abdominal pain
  • Abdominal pain - cause unknown
  • Abdominal pain in early pregnancy
  • Abdominal pain in pregnancy
  • Abdominal pain through to back
  • Abdominal pain worse on motion
  • Abdominal wall pain
  • Acute abdominal pain
  • Acute exacerbation of chronic abdominal pain
  • Appendicular pain
  • Chronic abdominal pain
  • Chronic nonspecific abdominal pain
  • Chronic visceral pain due to disorder
  • Chronic visceral pain in abdominal region due to disorder
  • Flank pain
  • Intractable abdominal pain
  • Left flank pain
  • Left sided abdominal pain
  • Localized abdominal pain
  • Localized pain
  • Non-colicky abdominal pain
  • Nonspecific abdominal pain
  • Pain due to enlargement of spleen
  • Pain in abdominal region on palpation
  • Pain on abdominal wall movement
  • Postoperative abdominal pain
  • Recurrent abdominal pain
  • Right flank pain
  • Right sided abdominal pain
  • Stomach ache
  • Stomach cramps
  • Visceral abdominal pain

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Pain(s)
      • abdominal

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM006
Abdominal pain and other digestive/abdomen signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Abdominal Pain

    sensation of discomfort, distress, or agony in the abdominal region.

  • Flank Pain

    pain emanating from below the ribs and above the ilium.

Patient EducationClinical

Abdominal Pain

Your abdomen extends from below your chest to your groin. Some people call it the stomach, but your abdomen contains many other important organs. Pain in the abdomen can come from any one of them. The pain may start somewhere else, such as your chest. Severe pain doesn't always mean a serious problem.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert R10.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
789.00 Abdmnal pain unspcf site
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R10.9Overview

Is R10.9 (Abdominal and pelvic pain) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified abdominal pain on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R10.9 group to?

When unspecified abdominal pain is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R10.9 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the unspecified abdominal pain is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R10.9?

Under the General Equivalence Mappings, unspecified abdominal pain converts to ICD-9-CM 789.00 (abdmnal pain unspcf site). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.