2026 ICD-10-CM Diagnosis Code S96.912DStrain of unspecified muscle and tendon at ankle and foot level, left foot, subsequent encounter

ICD-10-CM Codes›S00–T88›S90-S99›S96

ICD-10-CM S96.912D
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S96.912D is a billable ICD-10-CM diagnosis code for strain of unspecified muscle and tendon at ankle and foot level, left 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 Sprains and strains, subsequent encounter.

Code Identity

ICD-10-CM Code
S96.912D
Billable Status
Yes — Valid for Submission
Code Describes
Strain of unspecified muscle and tendon at ankle and foot level, left foot, subsequent encounter
Short Description
Strain of unsp msl/tnd at ank/ft level, left foot, subs
Parent Code
S96.912
Strain of unspecified muscle and tendon at ankle and foot level, left 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 CodeS96.912DStrain of unspecified muscle and tendon at ankle and foot level, left foot, subsequent encounter

Present on Admission (POA)Billing

S96.912D 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.

  • Ankle pain
  • Injury of muscle of left foot
  • Repetitive motion disorder of left ankle
  • Repetitive motion disorder of left foot
  • Strain of muscle of left foot
  • Strain of tendon of ankle
  • Strain of tendon of foot
  • Strain of tendon of left ankle
  • Strain of tendon of left foot
  • Strain of tendon of left lower limb
  • Traumatic tear of tendon of ankle
  • Traumatic tear of tendon of foot
  • Traumatic tear of tendon of left ankle
  • Traumatic tear of tendon of left 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 INJ061
Sprains and strains, 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 S96.912D 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 S96.912DOverview

Is S96.912D a billable code?

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

What does the 7th character D in S96.912D mean?

The final character D marks a subsequent encounter: use it for routine care while the strain of unspecified muscle and tendon at ankle and foot level, left foot is healing, after active treatment has ended.

What MS-DRG does S96.912D group to?

When strain of unspecified muscle and tendon at ankle and foot level, left 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 S96.912D 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 strain of unspecified muscle and tendon at ankle and foot level, left foot, subsequent encounter on inpatient claims.

What is the ICD-9 equivalent of S96.912D?

Under the General Equivalence Mappings, strain of unspecified muscle and tendon at ankle and foot level, left 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.