2026 ICD-10-CM Diagnosis Code T80.90XAUnspecified complication following infusion and therapeutic injection, initial encounter
T80.90XA is a billable ICD-10-CM diagnosis code for unspecified complication following infusion and therapeutic injection, 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. 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.
- Acute disorder of hemodialysis
- Complication of dialysis
- Complication of extracorporeal circulation
- Complication of hemodialysis
- Complication of infusion
- Complication of injection
- Complication of perfusion
- Complication of renal dialysis
- Diabetic monitoring - injection sites
- Diabetic monitoring - injection sites abnormal
- Injection site disorder
- Long-term disorder of dialysis
- Loss of ultrafiltration
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Complications following infusion, transfusion and therapeutic injection (T80). 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 T80.90XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T80.90XAOverview
Is T80.90XA a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified complication following infusion and therapeutic injection, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T80.90XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified complication following infusion and therapeutic injection, such as an emergency visit or first evaluation.
What MS-DRG does T80.90XA group to?
When unspecified complication following infusion and therapeutic injection, 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.
What is the ICD-9 equivalent of T80.90XA?
Under the General Equivalence Mappings, unspecified complication following infusion and therapeutic injection, initial encounter converts to ICD-9-CM 999.88 (infusion reaction 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.
