2026 ICD-10-CM Diagnosis Code S36.510SPrimary blast injury of ascending [right] colon, sequela
S36.510S is a billable ICD-10-CM diagnosis code for primary blast injury of ascending [right] colon, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. 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. The code is exempt from POA reporting. Coders also document this condition as blast injury to intestines. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S36.510S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Blast injury to intestines
- Injury of ascending colon
- Primary blast injury of ascending colon
- Primary blast injury of colon
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
Colonic Diseases
Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S36.510S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S36.510SOverview
Is S36.510S (Primary blast injury of ascending [right] colon) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report primary blast injury of ascending [right] colon, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S36.510S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the primary blast injury of ascending [right] colon itself has resolved, not the original event.
What MS-DRG does S36.510S group to?
When primary blast injury of ascending [right] colon, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S36.510S exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for primary blast injury of ascending [right] colon, sequela on inpatient claims.
What is the ICD-9 equivalent of S36.510S?
Under the General Equivalence Mappings, primary blast injury of ascending [right] colon, sequela converts to ICD-9-CM 908.1 (late eff int inj abdomen). 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.
