2026 ICD-10-CM Diagnosis Code S35.516DInjury of unspecified iliac vein, subsequent encounter
S35.516D is a billable ICD-10-CM diagnosis code for injury of unspecified iliac vein, 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 iliac vein. 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
S35.516D 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 iliac vein
- Injury of internal iliac vein
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of blood vessels at abdomen, lower back and pelvis level (S35). 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
Wounds and Injuries
An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S35.516D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S35.516DOverview
Is S35.516D (Injury of unspecified iliac vein) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of unspecified iliac vein, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S35.516D mean?
The final character D marks a subsequent encounter: use it for routine care while the injury of unspecified iliac vein is healing, after active treatment has ended.
What MS-DRG does S35.516D group to?
When injury of unspecified iliac vein, 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 S35.516D 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 injury of unspecified iliac vein, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S35.516D?
Under the General Equivalence Mappings, injury of unspecified iliac vein, 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.
