2026 ICD-10-CM Diagnosis Code S33.2XXADislocation of sacroiliac and sacrococcygeal joint, initial encounter

ICD-10-CM Codes›S00–T88›S30-S39›S33

ICD-10-CM S33.2XXA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S33.2XXA is a billable ICD-10-CM diagnosis code for dislocation of sacroiliac and sacrococcygeal joint, 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 551 through 552, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, initial encounter.

Code Identity

ICD-10-CM Code
S33.2XXA
Billable Status
Yes — Valid for Submission
Code Describes
Dislocation of sacroiliac and sacrococcygeal joint, initial encounter
Short Description
Dislocation of sacroiliac and sacrococcygeal joint, init
Parent Code
S33.2
Dislocation of sacroiliac and sacrococcygeal 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 CodeS33.2XXADislocation of sacroiliac and sacrococcygeal joint, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Closed dislocation of sacrum
  • Closed fracture dislocation of sacroiliac joint
  • Closed subluxation of coccyx
  • Closed subluxation of sacrum
  • Closed traumatic dislocation of coccyx
  • Closed traumatic dislocation of pelvis
  • Closed traumatic dislocation of sacroiliac joint
  • Fracture dislocation of sacroiliac joint
  • Fracture subluxation of sacroiliac joint
  • Open dislocation of coccyx
  • Open dislocation of sacroiliac joint
  • Open dislocation of sacrum
  • Open fracture dislocation of sacroiliac joint
  • Open subluxation of coccyx
  • Open subluxation of sacrum
  • Open traumatic subluxation of pelvis
  • Subluxation of coccyx
  • Subluxation of sacroiliac joint
  • Subluxation of sacrum
  • Traumatic dislocation of sacrococcygeal joint
  • 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 INJ007
Dislocations, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Dislocations

Dislocations are joint injuries that force the ends of your bones out of position. The cause is often a fall or a blow, sometimes from playing a contact sport. You can dislocate your ankles, knees, shoulders, hips, elbows and jaw. You can also dislocate your finger and toe joints.

Read the full article at MedlinePlus

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

Convert S33.2XXA to ICD-9-CMHistory

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

ICD-9-CM
839.41 Dislocat coccyx-closed
Approximate The match is approximate rather than exact.
ICD-9-CM
839.42 Dislocat sacrum-closed
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 S33.2XXAOverview

Is S33.2XXA (Dislocation of sacroiliac and sacrococcygeal joint) a billable code?

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

What does the 7th character A in S33.2XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for dislocation of sacroiliac and sacrococcygeal joint, such as an emergency visit or first evaluation.

What MS-DRG does S33.2XXA group to?

When dislocation of sacroiliac and sacrococcygeal joint, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 551, 552, 963, 964, 965, with relative weights from 0.9405 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S33.2XXA?

Under the General Equivalence Mappings, dislocation of sacroiliac and sacrococcygeal joint, initial encounter converts to ICD-9-CM 839.41 (dislocat coccyx-closed) and 839.42 (dislocat sacrum-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.