2026 ICD-10-CM Diagnosis Code S36.032AMajor laceration of spleen, initial encounter

ICD-10-CM Codes›S00–T88›S30-S39›S36

ICD-10-CM S36.032A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S36.032A is a billable ICD-10-CM diagnosis code for major laceration of spleen, 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 791, 793, 814 through 816, 963 through 965. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 169 closely related codes. Coders also document this condition as avulsion of spleen. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Internal organ injury, initial encounter.

Code Identity

ICD-10-CM Code
S36.032A
Billable Status
Yes — Valid for Submission
Code Describes
Major laceration of spleen, initial encounter
Short Description
Major laceration of spleen, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S36.032
Major laceration of spleen

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
CategoryS36Injury of intra-abdominal organs
This CodeS36.032AMajor laceration of spleen, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Avulsion of spleen
  • Injury of spleen with open wound into abdominal cavity
  • Injury of spleen without open wound into abdominal cavity
  • Laceration of spleen
  • Major laceration of spleen
  • Massive parenchymal disruption of spleen with open wound into abdominal cavity
  • Massive parenchymal disruption of spleen without open wound into abdominal cavity
  • Open injury of spleen

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.

CCSR INJ010
Internal organ injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spleen Diseases

Your spleen is an organ above your stomach and under your ribs on your left side. It is about as big as your fist. The spleen is part of your lymphatic system, which fights infection and keeps your body fluids in balance. It contains white blood cells that fight germs.

Read the full article at MedlinePlus

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

Convert S36.032A to ICD-9-CMHistory

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

ICD-9-CM
865.04 Spleen disruption-clos
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 S36.032AOverview

What is the ICD-10 code for major laceration of spleen, initial encounter?

The ICD-10-CM code for major laceration of spleen, initial encounter is S36.032A (sometimes written as S36032A). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is S36.032A (Major laceration of spleen) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report major laceration of spleen, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S36.032A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for major laceration of spleen, such as an emergency visit or first evaluation.

What MS-DRG does S36.032A group to?

When major laceration of spleen, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 791, 793, 814, 815, 816, 963, 964, 965, with relative weights from 0.6320 to 4.1696 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S36.032A a CC or MCC?

CMS lists S36.032A as an MCC (major complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 169 closely related codes in its exclusion list.