2027 ICD-10-CM Diagnosis Code S96.811AStrain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter

ICD-10-CM Codes›S00–T88›S90-S99›S96

ICD-10-CM S96.811A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S96.811A is a billable ICD-10-CM diagnosis code for strain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 562 through 563, 963 through 965. Coders also document this condition as rupture of plantar fascia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sprains and strains, initial encounter.

Code Identity

ICD-10-CM Code
S96.811A
Billable Status
Yes — Valid for Submission
Code Describes
Strain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter
Short Description
Strain of muscles and tendons at ank/ft level, r foot, init
Parent Code
S96.811
Strain of other specified muscles and tendons 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 CodeS96.811AStrain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Rupture of plantar fascia
  • Traumatic tear of plantar fascia
  • Traumatic tear of plantar fascia 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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S96.811A: its own notes plus those printed at S96, block S90-S99, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S96 Injury of muscle and tendon at ankle and foot level applies to 180 codes
  • injury of Achilles tendon (S86.0-)
  • sprain of joints and ligaments of ankle and foot (S93.-)
From Block S90-S99 Injuries to the ankle and foot applies to 3,324 codes
  • burns and corrosions (T20-T32)
  • fracture of ankle and malleolus (S82.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S96 Injury of muscle and tendon at ankle and foot level applies to 180 codes
  • any associated open wound (S91.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S96 Injury of muscle and tendon at ankle and foot level applies to 180 codes
  • The appropriate 7th character is to be added to each code from category S96
Values for category S96 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter this code
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S96.811A, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming S96.811A: its condition is not part of those codes, and both may be reported when the patient has both.

  • S86 Injury of muscle, fascia and tendon at lower leg level
    injury of muscle, fascia and tendon at ankle (S96.-) names S96.-, which includes this code
  • S93 Dislocation and sprain of joints and ligaments at ankle, foot and toe level
    strain of muscle and tendon of ankle and foot (S96.-) names S96.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ024
Sprains and strains, initial encounter
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 S96.811A to ICD-9-CMHistory

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

ICD-9-CM
845.09 Sprain of ankle NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
845.19 Sprain of foot NEC
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S96.811AOverview

Is S96.811A a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report strain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S96.811A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for strain of other specified muscles and tendons at ankle and foot level, right foot, such as an emergency visit or first evaluation.

What MS-DRG does S96.811A group to?

When strain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 563, 964, 965, 562, 963, with relative weights from 0.8982 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S96.811A?

Under the General Equivalence Mappings, strain of other specified muscles and tendons at ankle and foot level, right foot, initial encounter converts to ICD-9-CM 845.09 (sprain of ankle NEC) and 845.19 (sprain of foot NEC). The mapping is approximate, so confirm the match fits the documentation.