T78.02XD — Anaphylactic reaction due to shellfish (crustaceans), subsequent encounter
Is T78.02XD billable?
Yes — T78.02XD is billable for FY2027. T78.02XD is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T78.02XD may be submitted for encounters from October 1, 2026 through September 30, 2027.
T78.02XD at a glance
| Code | T78.02XD |
|---|---|
| Description | Anaphylactic reaction due to shellfish (crustaceans), 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 T78.02XD?
In T78.02XD, the 7th character D means subsequent encounter. The 7th character is required for T78.02XD to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T78.02XD group to?
T78.02XD 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 T78.02XD listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T78.02, the nearest indexed parent of T78.02XD. Use them to find the family, then select the specific code.
- Shock › anaphylactic › due to food › fish › shellfish
Use additional code — inherited from Chapter 19
Report an additional code alongside T78.02XD to fully describe the condition. T78.02XD is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T78.02XD, but a patient may have both at the same time. When documentation supports it, T78.02XD and the excluded code may both be reported.
Excludes2 — not included here — inherited from T78
The conditions below are not part of T78.02XD, but a patient may have both at the same time. When documentation supports it, T78.02XD and the excluded code may both be reported.
- complications of surgical and medical care NEC (T80-T88)
Code also — inherited from T66-T78
Two codes may be needed to describe the condition fully. Whether T78.02XD 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 T78.02XD existed?
T78.02XD has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.