2026 ICD-10-CM Diagnosis Code S93.333SOther subluxation of unspecified foot, sequela

ICD-10-CM Codes›S00–T88›S90-S99›S93

ICD-10-CM S93.333S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S93.333S is a billable ICD-10-CM diagnosis code for other subluxation of unspecified foot, 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 closed fracture dislocation of subtalar joint. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S93.333S
Billable Status
Yes — Valid for Submission
Code Describes
Other subluxation of unspecified foot, sequela
Short Description
Other subluxation of unspecified foot, sequela
Same as the full description in the CMS dataset.
Parent Code
S93.333
Other subluxation of unspecified foot

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS90-S99Injuries to the ankle and foot
CategoryS93Dislocation and sprain of joints and ligaments at ankle, foot and toe level
This CodeS93.333SOther subluxation of unspecified foot, sequela

Present on Admission (POA)Billing

S93.333S 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 fracture dislocation of subtalar joint
  • Closed fracture subluxation of foot
  • Closed fracture subluxation of subtalar joint
  • Open traumatic dislocation, midtarsal joint
  • Open traumatic dislocation, pantalar
  • Open traumatic subluxation, midtarsal joint
  • Open traumatic subluxation, pantalar
  • Traumatic arthropathy of talonavicular joint

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments at ankle, foot and toe level (S93). 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

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 S93.333S to ICD-9-CMHistory

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

ICD-9-CM
905.6 Late effect dislocation
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 S93.333SOverview

Is S93.333S (Other subluxation of unspecified foot) a billable code?

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

What does the 7th character S in S93.333S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the other subluxation of unspecified foot itself has resolved, not the original event.

What MS-DRG does S93.333S group to?

When other subluxation of unspecified foot, 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 S93.333S 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 other subluxation of unspecified foot, sequela on inpatient claims.

What is the ICD-9 equivalent of S93.333S?

Under the General Equivalence Mappings, other subluxation of unspecified foot, sequela converts to ICD-9-CM 905.6 (late effect dislocation). 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.