2026 ICD-10-CM Diagnosis Code S85.209DUnspecified injury of peroneal artery, unspecified leg, subsequent encounter
S85.209D is a billable ICD-10-CM diagnosis code for unspecified injury of peroneal artery, unspecified 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. Coders also document this condition as injury of peroneal artery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury to blood vessels, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S85.209D 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 peroneal artery
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of blood vessels at lower leg level (S85). 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.
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).
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Convert S85.209D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S85.209DOverview
Is S85.209D (Unspecified injury of peroneal artery, unspecified leg) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of peroneal artery, unspecified leg, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S85.209D mean?
The final character D marks a subsequent encounter: use it for routine care while the unspecified injury of peroneal artery, unspecified leg is healing, after active treatment has ended.
What MS-DRG does S85.209D group to?
When unspecified injury of peroneal artery, unspecified 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 S85.209D 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 unspecified injury of peroneal artery, unspecified leg, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S85.209D?
Under the General Equivalence Mappings, unspecified injury of peroneal artery, unspecified 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.
