2026 ICD-10-CM Diagnosis Code S36.60XAUnspecified injury of rectum, initial encounter
S36.60XA is a billable ICD-10-CM diagnosis code for unspecified injury of rectum, 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 393 through 395, 963 through 965. 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 anal canal
- Injury of intestine without open wound into abdominal cavity
- Injury of multiple intra-abdominal organs with open wound into abdominal cavity
- Injury of multiple sites of colorectum with open wound into abdominal cavity
- Injury of multiple sites of rectum
- Injury of rectum
- Injury of rectum with open wound into abdominal cavity
- Injury of rectum without open wound into abdominal cavity
- Injury to intestine during surgery
- Injury to rectum during surgery
- Multiple injuries of digestive system
- Multiple injuries of intestine
- Traumatic proctitis
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of intra-abdominal organs (S36). 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
Rectal Disorders
The rectum is the lower part of your large intestine where your body stores stool. Problems with the rectum are common. They include hemorrhoids, abscesses, incontinence and cancer.
Read the full article at MedlinePlus
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Convert S36.60XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S36.60XAOverview
Is S36.60XA (Unspecified injury of rectum) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of rectum, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S36.60XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified injury of rectum, such as an emergency visit or first evaluation.
What MS-DRG does S36.60XA group to?
When unspecified injury of rectum, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, 963, 964, 965, with relative weights from 0.6490 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S36.60XA?
Under the General Equivalence Mappings, unspecified injury of rectum, initial encounter converts to ICD-9-CM 863.45 (rectum 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.
