2026 ICD-10-CM Diagnosis Code S37.501AUnspecified injury of fallopian tube, unilateral, initial encounter
S37.501A is a billable ICD-10-CM diagnosis code for unspecified injury of fallopian tube, unilateral, 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 742 through 743, 760 through 761. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Internal organ injury, initial encounter.
Code Identity
Code Classification
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
Uterine Diseases
The uterus, or womb, is the place where a fetus grows during pregnancy. Uterine diseases are conditions that affect the uterus. These diseases can be benign (not cancer) or malignant (cancerous). They may affect your menstrual periods, your ability to get pregnant, or the health of your reproductive organs.
The full article covers:
- What are uterine diseases?
- What causes uterine diseases?
- What are the symptoms of uterine diseases?
- How are uterine diseases diagnosed?
- What are the treatments for uterine diseases?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S37.501A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S37.501AOverview
Is S37.501A (Unspecified injury of fallopian tube, unilateral) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of fallopian tube, unilateral, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S37.501A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified injury of fallopian tube, unilateral, such as an emergency visit or first evaluation.
What MS-DRG does S37.501A group to?
When unspecified injury of fallopian tube, unilateral, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S37.501A?
Under the General Equivalence Mappings, unspecified injury of fallopian tube, unilateral, initial encounter converts to ICD-9-CM 867.6 (pelvic organ inj NEC-cl). 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.
