ICD-10-CM
HIPAA-mandated diagnosis code set as of October 1, 2014
code
three- to seven-character alphanumeric representation of a disease or condition
Alphabetical indexes
part of the ICD-10-CM listing diseases and injuries alphabetically with corresponding diagnosis codes
Tabular List
part of the ICD-10-CM listing diagnosis codes in chapters alphanumerically
Neoplasm Table
summary table of code numbers for neoplasms by anatomical site and divided by the description of the neoplasm
Table of Drugs and Chemicals
index in a table format of drugs and chemicals that are listed in the Tabular List
Index of External Causes
index of all external causes of disease and injuries classified in the Tabular List
diagnosis statement
physician's description of the main reason for a patient's encounter
convention
typographic technique that provides visual guidance for understanding information
main term
word the identifies a disease of condition in the Alphabetic table
default code
ICD-10-CM code listed next to the main term in the Alphabetic index that is most often associated with a particular disease or condition
subterm
word of phrase that describes a main term in the Alphabetical index
etiology
cause or origin of a disease of condition
nonessential modifyer
supplementary word of phrase that helps define a code in ICD-10-CM
eponym
name of phrase formed from or based on a person's name
NEC (not elsewhere classifiable)
abbreviation indication the coded to use when a disease of condition cannot be placed in any other category
NOS (not otherwise specified)
term that indicates the coded to used when no information is available for assigning the disease of condition a more specific code; unspecified
manifestation
characteristic sign of symptom of a disease
first-listed code
code for diagnosis that is the patient's main condition; in cases involving an underlying condition and a manifestation, the underlying condition is the first-listed code
combination code
single code describing both the etiology and the manifestation(s) of a particular condition
placeholder character (x)
character "x" inserted in a code to fill a blank space
seventh-character extention
necessary assignment of a seventh character to a code; often for the sequence of an encounter
category
three-character code for classifying a disease of condition
subcategory
four- or five- character code number
inclusion notes
Tabular List entries addressing the applicability of certain codes to specified conditions
exclusion notes
Tabular List entries limiting applicability of particular codes to specified conditions
excludes 1
exclusion note used when two conditions could not exist together, such as an acquired and a congenital condition; means "not coded here"
excludes 2
exclusion note meaning that a particular condition is not included here, but a patient could have both conditions at the same time
laterality
use of ICD-10-CM classification system to capture the side of the body that is documented; the fourth, fifth, and sixth characters of a code specify the affected side(s)
ICD-10-CM Official Guidelines for Coding and Reporting
general rules, inpatient (hospital) coding guidance, and outpatient (physician's office/clinic) coding guidance from the four cooperating parties (CMS advisers and partiipants from the AHA, AHIMA, and NCHS)
primary diagnosis
first-listed diagnosis
coexisting condition
additional illness that either has an effect on the patient's primary illness or is also treated during the encounter
acute
illness or condition with severe symptoms and a short duration
chronic
illness or condition with a long duration
sequelae
conditions that remain after an acute illness or injury has been treated and resolved
principal diagnosis
in inpatient coding, the condition is established after study to be chiefly responsible for the admission of the patient
external cause code
ICD-10-CM code for an external cause of a disease or injury
Z code
abbreviation for codes from the 21st chapter of the ICD-10-CM that identify factors that influence health status and encounters that are not due to illness or injury
chief complaint (CC)
patient's description of the symptoms or other reasons for seeking medical care
ICD-9-CM
previous HIPAA mandated diagnosis code set
GEMs
acronym for general equivalence mappings, reference tables or related ICD-10-CM and ICD-9-CM codes