X37.1XXA — Tornado, initial encounter
Is X37.1XXA billable?
Yes — X37.1XXA is billable for FY2027. X37.1XXA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. X37.1XXA may be submitted for encounters from October 1, 2026 through September 30, 2027.
X37.1XXA at a glance
| Code | X37.1XXA |
|---|---|
| Description | Tornado, 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 X37.1XXA?
In X37.1XXA, the 7th character A means initial encounter. The 7th character is required for X37.1XXA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is X37.1XXA listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under X37.1, the nearest indexed parent of X37.1XXA. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Cyclone (any injury)
- Tornado (any injury)
- Forces of nature › cyclone
- Forces of nature › tornado
- Forces of nature › twister
- Drowning › due to › cyclone (accidental)
- Forces of nature › cataclysmic storm › cyclone
- Forces of nature › cataclysmic storm › tornado
Inclusion terms
Alternative wording in documentation that is classified to X37.1XXA.
- Cyclone
- Twister
How long has X37.1XXA existed?
X37.1XXA 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.