2026 ICD-10-CM Diagnosis Code S96.899SOther specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela

ICD-10-CM Codes›S00–T88›S90-S99›S96

ICD-10-CM S96.899S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S96.899S is a billable ICD-10-CM diagnosis code for other specified injury of other specified muscles and tendons at ankle and foot level, 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 913 through 914. The code is exempt from POA reporting. Coders also document this condition as complete division, extensor tendon, foot. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S96.899S
Billable Status
Yes — Valid for Submission
Code Describes
Other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela
Short Description
Inj oth musc and tendons at ank/ft level, unsp foot, sequela
Parent Code
S96.899
Other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS90-S99Injuries to the ankle and foot
CategoryS96Injury of muscle and tendon at ankle and foot level
This CodeS96.899SOther specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela

Present on Admission (POA)Billing

S96.899S 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.

  • Complete division, extensor tendon, foot
  • Complete division, flexor tendon, foot
  • Partial division, extensor tendon of foot
  • Partial division, flexor tendon of foot
  • Traumatic division of extensor tendon of toe

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of muscle and tendon at ankle and foot level (S96). 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

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 S96.899S to ICD-9-CMHistory

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

ICD-9-CM
908.9 Late effect injury NOS
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 S96.899SOverview

Is S96.899S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S96.899S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot itself has resolved, not the original event.

What MS-DRG does S96.899S group to?

When other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 913, 914, with relative weights from 0.8855 to 1.6346 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S96.899S 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 specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela on inpatient claims.

What is the ICD-9 equivalent of S96.899S?

Under the General Equivalence Mappings, other specified injury of other specified muscles and tendons at ankle and foot level, unspecified foot, sequela converts to ICD-9-CM 908.9 (late effect injury NOS). 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.