2026 ICD-10-CM Diagnosis Code S83.193SOther subluxation of unspecified knee, sequela

ICD-10-CM Codes›S00–T88›S80-S89›S83

ICD-10-CM S83.193S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S83.193S is a billable ICD-10-CM diagnosis code for other subluxation of unspecified knee, 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
S83.193S
Billable Status
Yes — Valid for Submission
Code Describes
Other subluxation of unspecified knee, sequela
Short Description
Other subluxation of unspecified knee, sequela
Same as the full description in the CMS dataset.
Parent Code
S83.193
Other subluxation of unspecified knee

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS80-S89Injuries to the knee and lower leg
CategoryS83Dislocation and sprain of joints and ligaments of knee
This CodeS83.193SOther subluxation of unspecified knee, sequela

Present on Admission (POA)Billing

S83.193S 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 traumatic dislocation knee joint, lateral
  • Closed traumatic dislocation knee joint, medial
  • Closed traumatic dislocation knee joint, posterior
  • Closed traumatic dislocation patellofemoral joint, lateral
  • Closed traumatic dislocation patellofemoral joint, medial
  • Closed traumatic dislocation, head of fibula
  • Closed traumatic subluxation knee joint
  • Closed traumatic subluxation knee joint, anterior
  • Closed traumatic subluxation knee joint, lateral
  • Closed traumatic subluxation knee joint, medial
  • Closed traumatic subluxation knee joint, posterior
  • Closed traumatic subluxation knee joint, rotatory
  • Closed traumatic subluxation patellofemoral joint
  • Closed traumatic subluxation patellofemoral joint, lateral
  • Closed traumatic subluxation patellofemoral joint, medial
  • Closed traumatic subluxation, head of fibula
  • Lateral patellofemoral dislocation
  • Open traumatic dislocation knee joint, anterior
  • Open traumatic dislocation knee joint, lateral
  • Open traumatic dislocation knee joint, medial
  • Open traumatic dislocation knee joint, posterior
  • Open traumatic dislocation of patellofemoral joint
  • Open traumatic dislocation patellofemoral joint, lateral
  • Open traumatic dislocation patellofemoral joint, medial
  • Open traumatic dislocation, head of fibula
  • Open traumatic subluxation knee joint
  • Open traumatic subluxation knee joint, anterior
  • Open traumatic subluxation knee joint, lateral
  • Open traumatic subluxation knee joint, medial
  • Open traumatic subluxation knee joint, posterior
  • Open traumatic subluxation knee joint, rotatory
  • Open traumatic subluxation patellofemoral joint
  • Open traumatic subluxation patellofemoral joint, lateral
  • Open traumatic subluxation patellofemoral joint, medial
  • Open traumatic subluxation, head of fibula
  • Subluxation of patellofemoral joint

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments of knee (S83). 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 S83.193S 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 S83.193SOverview

Is S83.193S (Other subluxation of unspecified knee) a billable code?

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

What does the 7th character S in S83.193S mean?

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

What MS-DRG does S83.193S group to?

When other subluxation of unspecified knee, 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 S83.193S 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 knee, sequela on inpatient claims.

What is the ICD-9 equivalent of S83.193S?

Under the General Equivalence Mappings, other subluxation of unspecified knee, 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.