2026 ICD-10-CM Diagnosis Code S93.313DSubluxation of tarsal joint of unspecified foot, subsequent encounter

ICD-10-CM Codes›S00–T88›S90-S99›S93

ICD-10-CM S93.313D
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S93.313D is a billable ICD-10-CM diagnosis code for subluxation of tarsal joint of unspecified foot, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Dislocations, subsequent encounter.

Code Identity

ICD-10-CM Code
S93.313D
Billable Status
Yes — Valid for Submission
Code Describes
Subluxation of tarsal joint of unspecified foot, subsequent encounter
Short Description
Subluxation of tarsal joint of unspecified foot, subs encntr
Parent Code
S93.313
Subluxation of tarsal joint 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 CodeS93.313DSubluxation of tarsal joint of unspecified foot, subsequent encounter

Present on Admission (POA)Billing

S93.313D 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 midtarsal joint
  • Closed fracture subluxation of foot
  • Closed fracture subluxation of midtarsal joint
  • Closed traumatic dislocation, midtarsal joint
  • Closed traumatic dislocation, pantalar
  • Closed traumatic dislocation, subtalar joint
  • Closed traumatic subluxation, foot
  • Closed traumatic subluxation, midtarsal joint
  • Closed traumatic subluxation, pantalar
  • Closed traumatic subluxation, subtalar joint
  • Cuboid syndrome
  • Open fracture dislocation of midtarsal joint
  • Open fracture subluxation of foot
  • Open fracture subluxation of midtarsal joint
  • Open fracture subluxation of subtalar joint
  • Open traumatic dislocation, midtarsal joint
  • Open traumatic dislocation, subtalar joint
  • Open traumatic subluxation, midtarsal joint
  • Open traumatic subluxation, subtalar joint
  • Subluxation of intertarsal joint
  • 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 INJ044
Dislocations, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Ankle Injuries and Disorders

Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.

Read the full article at MedlinePlus

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

Convert S93.313D to ICD-9-CMHistory

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

ICD-9-CM
V58.89 Other specfied aftercare
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 S93.313DOverview

Is S93.313D (Subluxation of tarsal joint of unspecified foot) a billable code?

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

What does the 7th character D in S93.313D mean?

The final character D marks a subsequent encounter: use it for routine care while the subluxation of tarsal joint of unspecified foot is healing, after active treatment has ended.

What MS-DRG does S93.313D group to?

When subluxation of tarsal joint of unspecified foot, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 949, 950, with relative weights from 0.6277 to 1.1897 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S93.313D 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 subluxation of tarsal joint of unspecified foot, subsequent encounter on inpatient claims.

What is the ICD-9 equivalent of S93.313D?

Under the General Equivalence Mappings, subluxation of tarsal joint of unspecified foot, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). 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.