2026 ICD-10-CM Diagnosis Code S33.9XXSSprain of unspecified parts of lumbar spine and pelvis, sequela
S33.9XXS is a billable ICD-10-CM diagnosis code for sprain of unspecified parts of lumbar spine and pelvis, 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. Coders also document this condition as dislocations, sprains and strains involving multiple body regions. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S33.9XXS 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.
- Dislocations, sprains and strains involving multiple body regions
- Dislocations, sprains and strains involving thorax with lower back and pelvis
- Dislocations/sprains/strains
- Lumbar sprain
- Sprain of ligament of lumbosacral joint
- Sprain of sacrococcygeal ligament
- Sprain of spinal ligament
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.
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 S33.9XXS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S33.9XXSOverview
Is S33.9XXS (Sprain of unspecified parts of lumbar spine and pelvis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report sprain of unspecified parts of lumbar spine and pelvis, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S33.9XXS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the sprain of unspecified parts of lumbar spine and pelvis itself has resolved, not the original event.
What MS-DRG does S33.9XXS group to?
When sprain of unspecified parts of lumbar spine and pelvis, 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 S33.9XXS 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 unspecified parts of lumbar spine and pelvis, sequela on inpatient claims.
What is the ICD-9 equivalent of S33.9XXS?
Under the General Equivalence Mappings, sprain of unspecified parts of lumbar spine and pelvis, 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.
