2026 ICD-10-CM Diagnosis Code T81.718AComplication of other artery following a procedure, not elsewhere classified, initial encounter
T81.718A is a billable ICD-10-CM diagnosis code for complication of other artery following a procedure, not elsewhere classified, 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 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. Coders also document this condition as acquired stenosis of common arterial trunk following procedure. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired stenosis of common arterial trunk following procedure
- Postoperative pulmonary embolus
- Postoperative pulmonary thromboembolism
- Postoperative thromboembolism of precerebral artery
- Post-radiological embolism of lower limb artery
- Pulmonary thromboembolism
- Pulmonary thrombosis
- Recoarctation of aorta following procedure
- Thromboembolus of precerebral artery
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Complications of procedures, not elsewhere classified (T81). 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.
Convert T81.718A to ICD-9-CMHistory
Code HistoryHistory
Questions About T81.718AOverview
Is T81.718A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report complication of other artery following a procedure, not elsewhere classified, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T81.718A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for complication of other artery following a procedure, not elsewhere classified, such as an emergency visit or first evaluation.
What MS-DRG does T81.718A group to?
When complication of other artery following a procedure, not elsewhere classified, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T81.718A?
Under the General Equivalence Mappings, complication of other artery following a procedure, not elsewhere classified, initial encounter converts to ICD-9-CM 997.2 (surg comp-peri vasc syst) and 997.79 (vascular comp vessel NEC). 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.
