2026 ICD-10-CM Diagnosis Code S96.221SLaceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela

ICD-10-CM Codes›S00–T88›S90-S99›S96

ICD-10-CM S96.221S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S96.221S is a billable ICD-10-CM diagnosis code for laceration of intrinsic muscle and tendon at ankle and foot level, right 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 604 through 605. The code is exempt from POA reporting. Coders also document this condition as injury of intrinsic muscle of foot. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S96.221S
Billable Status
Yes — Valid for Submission
Code Describes
Laceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela
Short Description
Lacerat intrinsic msl/tnd at ank/ft level, r foot, sequela
Parent Code
S96.221
Laceration of intrinsic muscle and tendon at ankle and foot level, right 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 CodeS96.221SLaceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela

Present on Admission (POA)Billing

S96.221S 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.

  • Injury of intrinsic muscle of foot
  • Injury of muscle of right foot
  • Laceration of intrinsic muscle of foot
  • Laceration of intrinsic muscle of right foot
  • Laceration of muscle of right foot
  • Laceration of right foot

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

Foot Injuries and Disorders

Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:

Read the full article at MedlinePlus

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

Convert S96.221S to ICD-9-CMHistory

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

ICD-9-CM
906.1 Late eff open wnd extrem
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 S96.221SOverview

Is S96.221S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report laceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S96.221S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the laceration of intrinsic muscle and tendon at ankle and foot level, right foot itself has resolved, not the original event.

What MS-DRG does S96.221S group to?

When laceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 604, 605, with relative weights from 0.9160 to 1.4721 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S96.221S 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 laceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela on inpatient claims.

What is the ICD-9 equivalent of S96.221S?

Under the General Equivalence Mappings, laceration of intrinsic muscle and tendon at ankle and foot level, right foot, sequela converts to ICD-9-CM 906.1 (late eff open wnd extrem). 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.