2026 ICD-10-CM Diagnosis Code S93.523SSprain of metatarsophalangeal joint of unspecified great toe, sequela

ICD-10-CM Codes›S00–T88›S90-S99›S93

ICD-10-CM S93.523S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S93.523S is a billable ICD-10-CM diagnosis code for sprain of metatarsophalangeal joint of unspecified great toe, 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 sprain of ligament of joint of great toe. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S93.523S
Billable Status
Yes — Valid for Submission
Code Describes
Sprain of metatarsophalangeal joint of unspecified great toe, sequela
Short Description
Sprain of MTP joint of unsp great toe, sequela
Parent Code
S93.523
Sprain of metatarsophalangeal joint of unspecified great toe

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 CodeS93.523SSprain of metatarsophalangeal joint of unspecified great toe, sequela

Present on Admission (POA)Billing

S93.523S 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.

  • Sprain of ligament of joint of great toe
  • Sprain of ligament of metatarsophalangeal joint of great toe
  • Sprain, metatarsophalangeal joint
  • Traumatic arthropathy of 1st metatarsophalangeal joint
  • Turf toe

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

Sprains and Strains

A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint. You might feel a pop or tear when the injury happens.

Read the full article at MedlinePlus

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

Convert S93.523S to ICD-9-CMHistory

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

ICD-9-CM
905.7 Late effec sprain/strain
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 S93.523SOverview

Is S93.523S (Sprain of metatarsophalangeal joint of unspecified great toe) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report sprain of metatarsophalangeal joint of unspecified great toe, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S93.523S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the sprain of metatarsophalangeal joint of unspecified great toe itself has resolved, not the original event.

What MS-DRG does S93.523S group to?

When sprain of metatarsophalangeal joint of unspecified great toe, 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 S93.523S 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 metatarsophalangeal joint of unspecified great toe, sequela on inpatient claims.

What is the ICD-9 equivalent of S93.523S?

Under the General Equivalence Mappings, sprain of metatarsophalangeal joint of unspecified great toe, 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.