T75.830D — Gulf war illness, subsequent encounter
Is T75.830D billable?
Yes — T75.830D is billable for FY2027. T75.830D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T75.830D may be submitted for encounters from October 1, 2026 through September 30, 2027.
T75.830D at a glance
| Code | T75.830D |
|---|---|
| Description | Gulf war illness, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in T75.830D?
In T75.830D, the 7th character D means subsequent encounter. The 7th character is required for T75.830D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T75.830D group to?
T75.830D sits in MDC 23 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
How is T75.830D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T75.830, the nearest indexed parent of T75.830D. Use them to find the family, then select the specific code.
- Illness › Gulf war
- Syndrome › Gulf war
Inclusion terms
Alternative wording in documentation that is classified to T75.830D.
- Gulf war syndrome
Excludes1 — never code together — inherited from T75
The conditions below can never be reported together with T75.830D on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- adverse effects NEC (T78.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T75.830D to fully describe the condition. T75.830D is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T75.83
Report an additional code alongside T75.830D to fully describe the condition. T75.830D is sequenced first.
- code to identify associated manifestations
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T75.830D, but a patient may have both at the same time. When documentation supports it, T75.830D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T75
The conditions below are not part of T75.830D, but a patient may have both at the same time. When documentation supports it, T75.830D and the excluded code may both be reported.
- burns (electric) (T20-T31)
Code also — inherited from T66-T78
Two codes may be needed to describe the condition fully. Whether T75.830D is sequenced first depends on the reason for the encounter.
- , if applicable, place of occurrence, such as:
- highway rest stop (Y92.523)
- school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- service areas as the place of occurrence of the external cause (Y92.52-)
- single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- transport vehicle as the place of occurrence of the external cause (Y92.81-)
How long has T75.830D existed?
T75.830D first appears in FY2026.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.