Conventions for ICD-10 CM
General Coding
Coding Abbreviations
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General Coding Guidelines
100

This code, listed next to a main term in the ICD-10-CM Alphabetic Index, represents the condition that is most commonly associated with the main term or is the unspecified code for the condition.

What is a default code?

100

This 7th character denotes initial encounter.

What is A?

100

NEC abbreviation

What is Not Elsewhere Classifable?

100

This insanely popular website debuted on Valentine's Day in 2005.

What is YouTube?

100

The residual effect (condition produced) after the acute phase of an illness or injury has terminated.

What is a sequela?

200

It is essential to use both the Alphabetical Index and this when locating and assigning a code.

What is the Tabular List?

200

This 7th character denotes sequela.

What is S?

200

NOS abbreviation

What is Not Otherwise Specified?

200

The holiday for which most flowers are sent besides Valentine's Day.

What is Mother's Day?

200

These codes specify whether the condition occurs on the left, right or is bilaterial.

What is Laterality?

300

These are used in both the Alphabetical Index and Tabular List to enclose supplementary words that may be present or absent in the statement of a disease or procedure with affecting the code number to which it is assigned.

What are parentheses?

300

This type of excludes note means 'NOT CODED HERE.'


What is type 1 Excludes note?

300

Codes are titled this for use when the information in the medical record is insufficient to assign a more specific code.

What is Unspecified?

300

This notorious gangster orchestrated the St. Valentine's Day massacre.

Who is Al Capone?

300

These are used in the Tabular List to enclose synonyms, alternative wording or explanatory phrases.

What are brackets?

400

These are used in the Tabular List after an incomplete term which needs one or more of the modifiers following it to make it assignable to a given category.

What are colons?

400

This note appears immediately under a three-character code title to further define, or give examples of, the content of the category.

What is the Include note?

400

The abbreviation for Type 1 ST elevation myocardial infarction.

What is STEMI?

400

Letters to Juliet are sent to this city every year.

What is Verona, Italy?

400

This type of code is used to classify two diagnoses, a diagnosis with an associated secondary process or a diagnosis with an associated complication.

What is a combination code?

500

ICD-10-CM utilizes this placeholder character at certain codes to allow for future expansion?

What is X?

500

When this type of excludes note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

What is type 2 Excludes  note?

500

International Classification of Diseases -10th Version-Clinical Modification

What is ICD-10-CM?

500

The person who originally wrote and recorded "I Will Always Love You" which was famously covered by Whitney Houston.

Who is Dolly Parton?

500

The default type of diabetes when the type is not mentioned in the medical record.

What is Type 2 diabetes mellitus?