2026 ICD-10-CM Diagnosis Code S86.291DOther injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter

ICD-10-CM Codes›S00–T88›S80-S89›S86

ICD-10-CM S86.291D
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S86.291D is a billable ICD-10-CM diagnosis code for other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, 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 Injury to nerves, muscles and tendons, subsequent encounter.

Code Identity

ICD-10-CM Code
S86.291D
Billable Status
Yes — Valid for Submission
Code Describes
Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
Short Description
Inj musc/tend anterior grp at low leg level, right leg, subs
Parent Code
S86.291
Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS80-S89Injuries to the knee and lower leg
CategoryS86Injury of muscle, fascia and tendon at lower leg level
This CodeS86.291DOther injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter

Present on Admission (POA)Billing

S86.291D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of muscle, fascia and tendon at lower leg level (S86). 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 INJ062
Injury to nerves, muscles and tendons, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).

Read the full article at MedlinePlus

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

Convert S86.291D 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 S86.291DOverview

Is S86.291D a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character D in S86.291D mean?

The final character D marks a subsequent encounter: use it for routine care while the other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg is healing, after active treatment has ended.

What MS-DRG does S86.291D group to?

When other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, 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 S86.291D 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 injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter on inpatient claims.

What is the ICD-9 equivalent of S86.291D?

Under the General Equivalence Mappings, other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, 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.