ICD-10-CM › S00-T88 › T51-T65 › T65.824 Toxic effect of harmful algae and... › T65.824D

T65.824D

Toxic effect of harmful algae and algae toxins, undetermined, subsequent encounter

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2007 Added to the draft code set draft Toxic effect of harmful algae and toxins, undetermined, subsequent encounter
  2. FY2010 Draft description revised draft Toxic effect of harmful algae and toxins, undetermined, subsequent encounter Toxic effect of harmful algae and algae toxins, undetermined, subsequent encounter

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from T65 Toxic effect of other and unspecified substances

Seventh character required

  • The appropriate 7th character is to be added to each code from category T65

Inherited from the T51-T65 section Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Excludes1 - never coded here

  • contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code

  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
  • personal history of foreign body fully removed (Z87.821)
  • to identify any retained foreign body, if applicable (Z18.-)

Note

  • When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
T65.824A Toxic effect of harmful algae and algae toxins, undetermined, initial encounter Valid
T65.824S Toxic effect of harmful algae and algae toxins, undetermined, sequela Valid