2026 ICD-10-CM Diagnosis Code T75.830A
Gulf war illness, initial encounter
- ICD-10-CM Code:
- T75.830A
- ICD-10 Code for:
- Gulf war illness, initial encounter
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
T75.830A is a billable diagnosis code used to specify a medical diagnosis of gulf war illness, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.
T75.830A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like gulf war illness. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.
Coding Guidelines
The appropriate 7th character is to be added to each code from block Other and unspecified effects of other external causes (T75). Use the following options for the aplicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
New 2026 ICD-10-CM Code
T75.830A is new to ICD-10-CM code set for the FY 2026, effective October 1, 2025. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2025. This is a new and revised code for the FY 2026 (October 1, 2025 - September 30, 2026).
Replacement Code
T75830A replaces the following previously assigned ICD-10-CM code(s):
- T75.89XA - Other specified effects of external causes, init encntr
Code History
- FY 2026 - Code Added, effective from 10/1/2025 through 9/30/2026
