ICD-10-CM Codes
V00-Y99 External causes of morbidity
X30-X39 Exposure to forces of nature
X37- Cataclysmic storm
2020 ICD-10-CM Diagnosis Code X37.1

2020 ICD-10-CM Diagnosis Code X37.1

Tornado

2016

2017

2018

2019

2020

Non-Billable/Non-Specific Code

X37.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2020 edition of ICD-10-CM X37.1 became effective on October 1, 2019.
This is the American ICD-10-CM version of X37.1 - other international versions of ICD-10 X37.1 may differ.

ICD-10-CM Coding Rules

X37.1 describes the circumstance causing an injury, not the nature of the injury.

Applicable To

Cyclone
Twister

The following code(s) above X37.1 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to X37.1:

V00-Y99
2020 ICD-10-CM Range V00-Y99
External causes of morbidity
Note
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.
External causes of morbidity

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change

External Cause Index entries containing back-references to X37.1:

Cyclone X37.1 (any injury)
Drowning (accidental) W74
ICD-10-CM Diagnosis Code W74
Unspecified cause of accidental drowning and submersion
Applicable To
Drowning NOS
- due to
  - cyclone X37.1
Forces of nature X39.8
ICD-10-CM Diagnosis Code X39.8
Other exposure to forces of nature
- cataclysmic storm X37.9
  ICD-10-CM Diagnosis Code X37.9
  Unspecified cataclysmic storm
  2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  Applicable To
  Storm NOS
  Type 1 Excludes
  collapse of dam or man-made structure causing earth movement (X36.0)
  - cyclone X37.1
  - tornado X37.1
  - twister X37.1
- cyclone X37.1
- tornado X37.1
- twister X37.1
Tornado X37.1 (any injury)

ICD-10-CM Codes Adjacent To X37.1

X36.0XXS …… sequela

X36.1 Avalanche, landslide, or mudslide

X36.1XXA …… initial encounter

X36.1XXD …… subsequent encounter

X36.1XXS …… sequela

X37 Cataclysmic storm

X37.0 Hurricane

X37.0XXA …… initial encounter

X37.0XXD …… subsequent encounter

X37.0XXS …… sequela

X37.1 Tornado

X37.1XXA …… initial encounter

X37.1XXD …… subsequent encounter

X37.1XXS …… sequela

X37.2 Blizzard (snow)(ice)

X37.2XXA …… initial encounter

X37.2XXD …… subsequent encounter

X37.2XXS …… sequela

X37.3 Dust storm

X37.3XXA …… initial encounter

X37.3XXD …… subsequent encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2020 ICD-10-CM Diagnosis Code X37.1

Tornado

External causes of morbidity

Unspecified cause of accidental drowning and submersion

Other exposure to forces of nature

Unspecified cataclysmic storm