2026 ICD-10-CM Diagnosis Code T82.818AEmbolism due to vascular prosthetic devices, implants and grafts, initial encounter
ICD-10-CM Codes›S00–T88›T80-T88›T82
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- 7th Character A — Initial Encounter
T82.818A is a billable ICD-10-CM diagnosis code for embolism due to vascular prosthetic devices, implants and grafts, 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 314 through 316. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 213 closely related codes. Coders also document this condition as vascular graft embolus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of cardiovascular device, implant or graft, initial encounter.
T82.818A no longer risk-adjusts for Medicare Advantage: it mapped to HCC 176 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 176, ESRD (V21) category 176, and ESRD (V24) category 176 for payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
T82.818A no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Vascular graft embolus
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Complications of cardiac and vascular prosthetic devices, implants and grafts (T82). 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 T82.818A to ICD-9-CMHistory
Code HistoryHistory
Questions About T82.818AOverview
Is T82.818A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report embolism due to vascular prosthetic devices, implants and grafts, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T82.818A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for embolism due to vascular prosthetic devices, implants and grafts, such as an emergency visit or first evaluation.
What MS-DRG does T82.818A group to?
When embolism due to vascular prosthetic devices, implants and grafts, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.
Is T82.818A a CC or MCC?
CMS lists T82.818A as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 213 closely related codes in its exclusion list.
What is the ICD-9 equivalent of T82.818A?
Under the General Equivalence Mappings, embolism due to vascular prosthetic devices, implants and grafts, initial encounter converts to ICD-9-CM 996.73 (comp-ren dialys dev/grft) and 996.74 (comp-oth vasc dev/graft). The mapping is approximate, so confirm the match fits the documentation.
Does T82.818A risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. T82.818A mapped to HCC 176 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 176 (Complications of Specified Implanted Device or Graft), ESRD (V21) category 176 (Complications of Specified Implanted Device or Graft), and ESRD (V24) category 176 (Complications of Specified Implanted Device or Graft).
