Code Also Notes in Chapter 20: External causes of morbidity and mortality ICD-10-CM
A Code Also note means two codes may be needed to fully describe a condition; it gives no sequencing direction. In Chapter 20 (V00-Y99), notes printed in the chapter name other codes 8 times, and Code Also Notes anywhere in the Tabular List name the chapter’s codes 17 times, covering 14 distinct codes, categories and ranges. Switch views to read the list either way.
Code Also Notes by the code that carries the note
- Y36.A Blast overpressure in war operations: explosion of torpedo (Y36.040)
- Y36.140 War operations involving destruction of aircraft due to accidental detonation of onboard munitions and explosives, military personnel 3 codes
- Y36.A Blast overpressure in war operations: accidental detonation of onboard munitions (Y36.140)
- Y36.230 War operations involving explosion of improvised explosive device [IED], military personnel 3 codes
- Y36.A Blast overpressure in war operations: improvised explosive device (Y36.230)
- Y36.A Blast overpressure in war operations: explosion of grenade (Y36.290)
- Y37.A Blast overpressure in military operations: explosion of torpedo (Y37.040)
- Y37.140 Military operations involving destruction of aircraft due to accidental detonation of onboard munitions and explosives, military personnel 3 codes
- Y37.A Blast overpressure in military operations: accidental detonation of onboard munitions (Y37.140)
- Y37.230 Military operations involving explosion of improvised explosive device [IED], military personnel 3 codes
- Y37.A Blast overpressure in military operations: improvised explosive device (Y37.230)
- Y37.A Blast overpressure in military operations: explosion of grenade (Y37.290)
- Y84.2 Radiological procedure and radiotherapy as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
- D84.822 Immunodeficiency due to external causes: , if applicable, radiological procedure and radiotherapy (Y84.2)
- J34.81 Nasal mucositis (ulcerative): radiological procedure and radiotherapy (Y84.2)
- K92.81 Gastrointestinal mucositis (ulcerative): radiological procedure and radiotherapy (Y84.2)
- N76.81 Mucositis (ulcerative) of vagina and vulva: radiological procedure and radiotherapy (Y84.2)
- Y92.01- Single-family non-institutional (private) house as the place of occurrence of the external cause 10 codes
- Block T66-T78 Other and unspecified effects of external causes: single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- Block T66-T78 Other and unspecified effects of external causes: school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- Y92.523 Highway rest stop as the place of occurrence of the external cause
- Block T66-T78 Other and unspecified effects of external causes: highway rest stop (Y92.523)
- Block T66-T78 Other and unspecified effects of external causes: service areas as the place of occurrence of the external cause (Y92.52-)
- Block T66-T78 Other and unspecified effects of external causes: transport vehicle as the place of occurrence of the external cause (Y92.81-)
The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Code Also Notes anywhere in the Tabular List, including notes in other chapters.
Questions About Code Also Notes
What does a Code Also note mean?
A Code Also note instructs that two codes may be required to fully describe a condition, but it does not give sequencing direction (Section I.A.17). The FY 2027 Tabular List has 689 of them; 495 name other codes, with 538 references to 349 distinct codes, categories and ranges.
Which code goes first with a Code Also note?
The note does not decide it. Sequencing depends on the circumstances of the encounter: normally the condition that is the main reason for the visit goes first.
Related References
Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.
