2026 ICD-10-CM Diagnosis Code S93.499SSprain of other ligament of unspecified ankle, sequela
S93.499S is a billable ICD-10-CM diagnosis code for sprain of other ligament of unspecified ankle, 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.
This medical diagnosis code is frequently used in Orthopedics medical specialties to designate conditions such selected sprains rotator cuff, cruciate ligament, and ankle.
Code Identity
Code Classification
Present on Admission (POA)Billing
S93.499S 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.
- Partial rupture of ligament
- Partial tear of medial ligament of ankle
- Partial tear, ankle, lateral ligament
- Rupture of ankle ligament
- Rupture of lateral ankle ligament
- Rupture of medial ankle ligament
- Sprain of lateral ligament of ankle joint
- Tear of talofibular ligament
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.
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 S93.499S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S93.499SOverview
Is S93.499S (Sprain of other ligament of unspecified ankle) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report sprain of other ligament of unspecified ankle, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S93.499S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the sprain of other ligament of unspecified ankle itself has resolved, not the original event.
What MS-DRG does S93.499S group to?
When sprain of other ligament of unspecified ankle, 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 S93.499S 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 other ligament of unspecified ankle, sequela on inpatient claims.
What is the ICD-9 equivalent of S93.499S?
Under the General Equivalence Mappings, sprain of other ligament of unspecified ankle, 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.
