T61.774A — Other fish poisoning, undetermined, initial encounter
Is T61.774A billable?
Yes — T61.774A is billable for FY2027. T61.774A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T61.774A may be submitted for encounters from October 1, 2026 through September 30, 2027.
T61.774A at a glance
| Code | T61.774A |
|---|---|
| Description | Other fish poisoning, undetermined, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T61.774A?
In T61.774A, the 7th character A means initial encounter. The 7th character is required for T61.774A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T61.774A group to?
T61.774A sits in MDC 21 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.
- 917Poisoning and Toxic Effects of Drugs with MCCmedical
- 918Poisoning and Toxic Effects of Drugs without MCCmedical
How is T61.774A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T61.77, the nearest indexed parent of T61.774A. Use them to find the family, then select the specific code.
- Poisoning › fish › specified type NEC (acute)
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T61.774A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Excludes1 — never code together — inherited from T61
The conditions below can never be reported together with T61.774A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- allergic reaction to food, such as:
- anaphylactic reaction or shock due to adverse food reaction (T78.0-)
- bacterial foodborne intoxications (A05.-)
- dermatitis (L23.6, L25.4, L27.2)
- food protein-induced enterocolitis syndrome (K52.21)
- food protein-induced enteropathy (K52.22)
- gastroenteritis (noninfective) (K52.29)
- toxic effect of aflatoxin and other mycotoxins (T64)
- toxic effect of cyanides (T65.0-)
- toxic effect of harmful algae bloom (T65.82-)
- toxic effect of hydrogen cyanide (T57.3-)
- toxic effect of mercury (T56.1-)
- toxic effect of red tide (T65.82-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T61.774A to fully describe the condition. T61.774A is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T61.774A to fully describe the condition. T61.774A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T61.774A, but a patient may have both at the same time. When documentation supports it, T61.774A and the excluded code may both be reported.
How long has T61.774A existed?
T61.774A 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.