2027 ICD-10-CM Diagnosis Code S85.162SUnspecified injury of posterior tibial artery, left leg, sequela
S85.162S is a billable ICD-10-CM diagnosis code for unspecified injury of posterior tibial artery, left leg, 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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. The code is exempt from POA reporting. Coders also document this condition as injury of left tibial artery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S85.162S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the knee and lower leg (S80-S89).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Injury of left tibial artery
- Injury of posterior tibial artery
- Traumatic injury of left posterior tibial 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 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 S85.162S: its own notes plus those printed at S85, block S80-S89, 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.
- injury of blood vessels at ankle and foot level (S95.-)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- 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.
Notes
General instructions on how these codes are used.
- 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.
- The appropriate 7th character is to be added to each code from category S85
- Ainitial encounter
- Dsubsequent encounter
- Ssequela this code
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name S85.162S, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming S85.162S: its condition is not part of those codes, and both may be reported when the patient has both.
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).
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S85.162S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S85.162SOverview
What is the ICD-10 code for unspecified injury of posterior tibial artery, left leg, sequela?
The ICD-10-CM code for unspecified injury of posterior tibial artery, left leg, sequela is S85.162S (sometimes written as S85162S). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is S85.162S (Unspecified injury of posterior tibial artery, left leg) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of posterior tibial artery, left leg, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in S85.162S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified injury of posterior tibial artery, left leg itself has resolved, not the original event.
What MS-DRG does S85.162S group to?
When unspecified injury of posterior tibial artery, left leg, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S85.162S 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 posterior tibial artery, left leg, sequela on inpatient claims. The code appears in the Injuries to the knee and lower leg (S80-S89) range of the CMS exempt list.
