2026 ICD-10-CM Diagnosis Code S37.10XAUnspecified injury of ureter, initial encounter
S37.10XA is a billable ICD-10-CM diagnosis code for unspecified injury of ureter, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700, 963 through 965. Coders also document this condition as injury of left ureter. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Internal organ injury, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Injury of left ureter
- Injury of right ureter
- Injury of ureter
- Injury of ureter during surgery
- Injury of ureter with open wound into abdominal cavity
- Injury of ureter without open wound into abdominal cavity
- Injury to ureteric wall
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of urinary and pelvic organs (S37). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Ureteral Disorders
Your kidneys make urine by filtering wastes and extra water from your blood. The urine travels from the kidneys to the bladder in two thin tubes called ureters.
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Convert S37.10XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S37.10XAOverview
Is S37.10XA (Unspecified injury of ureter) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of ureter, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S37.10XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified injury of ureter, such as an emergency visit or first evaluation.
What MS-DRG does S37.10XA group to?
When unspecified injury of ureter, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, 963, 964, 965, with relative weights from 0.6899 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S37.10XA?
Under the General Equivalence Mappings, unspecified injury of ureter, initial encounter converts to ICD-9-CM 867.2 (ureter injury-closed). 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.
