2026 ICD-10-CM Diagnosis Code S33.6XXSSprain of sacroiliac joint, sequela

ICD-10-CM Codes›S00–T88›S30-S39›S33

ICD-10-CM S33.6XXS
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S33.6XXS is a billable ICD-10-CM diagnosis code for sprain of sacroiliac joint, 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 562 through 563. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S33.6XXS
Billable Status
Yes — Valid for Submission
Code Describes
Sprain of sacroiliac joint, sequela
Short Description
Sprain of sacroiliac joint, sequela
Same as the full description in the CMS dataset.
Parent Code
S33.6
Sprain of sacroiliac joint

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
CategoryS33Dislocation and sprain of joints and ligaments of lumbar spine and pelvis
This CodeS33.6XXSSprain of sacroiliac joint, sequela

Present on Admission (POA)Billing

S33.6XXS 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.

  • Closed complete rupture sacroiliac joint
  • Complete disruption of pelvic ring
  • Complete tear, sacroiliac ligament
  • Disorder of left sacroiliac joint
  • Disorder of right sacroiliac joint
  • Open complete rupture of sacroiliac joint
  • Open dislocation of sacroiliac joint
  • Sacrum sprain
  • Sprain of anterior sacroiliac ligament
  • Sprain of left sacroiliac ligament
  • Sprain of posterior sacroiliac ligament
  • Sprain of right sacroiliac ligament
  • Sprain of sacroiliac ligament
  • Sprain of sacroiliac region
  • Sprain pelvic ligament
  • Sprain, symphysis pubis
  • Traumatic dislocation of sacroiliac joint

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments of lumbar spine and pelvis (S33). 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 INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spine Injuries and Disorders

Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:

Read the full article at MedlinePlus

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

Convert S33.6XXS to ICD-9-CMHistory

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

ICD-9-CM
905.7 Late effec sprain/strain
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 S33.6XXSOverview

Is S33.6XXS (Sprain of sacroiliac joint) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report sprain of sacroiliac joint, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S33.6XXS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the sprain of sacroiliac joint itself has resolved, not the original event.

What MS-DRG does S33.6XXS group to?

When sprain of sacroiliac joint, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 562, 563, with relative weights from 0.8955 to 1.4248 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S33.6XXS 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 sprain of sacroiliac joint, sequela on inpatient claims.

What is the ICD-9 equivalent of S33.6XXS?

Under the General Equivalence Mappings, sprain of sacroiliac joint, sequela converts to ICD-9-CM 905.7 (late effec sprain/strain). 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.