2021 ICD-10-CM Code T45.516

Underdosing of anticoagulants

Version 2021
Replaced Code
Non-Billable Code
Underdosing

Not Valid for Submission

T45.516 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of underdosing of anticoagulants. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:T45.516
Short Description:Underdosing of anticoagulants
Long Description:Underdosing of anticoagulants

Code Classification

Specific Coding for Underdosing of anticoagulants

Header codes like T45.516 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for underdosing of anticoagulants:

Replaced Code

This code was replaced in the 2021 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This code was replaced for the FY 2021 (October 1, 2020 - September 30, 2021).


  • K59.03 - Drug induced constipation

Table of Drugs and Chemicals

The code T45.516 is included in the Table of Drugs and Chemicals, this table contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents. According to ICD-10 coding guidelines it is advised to do not code directly from the Table of Drugs and Chemicals, instead always refer back to the Tabular List when doing the initial coding. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. It is important to use as many codes as necessary to specify all reported drugs, medicinal or chemical substances. If the same diagnosis code describes the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, utilize the code only once.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
self-harm
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
AcenocoumarinT45.511T45.512T45.513T45.514T45.515T45.516
AcenocoumarolT45.511T45.512T45.513T45.514T45.515T45.516
AnisindioneT45.511T45.512T45.513T45.514T45.515T45.516
Anticoagulant NECT45.511T45.512T45.513T45.514T45.515T45.516
Anticoagulant NEC
  »Antagonist
T45.511T45.512T45.513T45.514T45.515T45.516
BishydroxycoumarinT45.511T45.512T45.513T45.514T45.515T45.516
BromindioneT45.511T45.512T45.513T45.514T45.515T45.516
CoumadinT45.511T45.512T45.513T45.514T45.515T45.516
Coumadin
  »rodenticide
T45.511T45.512T45.513T45.514T45.515T45.516
CoumarinT45.511T45.512T45.513T45.514T45.515T45.516
CoumetarolT45.511T45.512T45.513T45.514T45.515T45.516
CumetharolT45.511T45.512T45.513T45.514T45.515T45.516
DaniloneT45.511T45.512T45.513T45.514T45.515T45.516
Dicoumarol, dicoumarin, dicumarolT45.511T45.512T45.513T45.514T45.515T45.516
DiphenadioneT45.511T45.512T45.513T45.514T45.515T45.516
Diphenadione
  »rodenticide
T45.511T45.512T45.513T45.514T45.515T45.516
Drotrecogin alfaT45.511T45.512T45.513T45.514T45.515T45.516
Enoxaparin (sodium)T45.511T45.512T45.513T45.514T45.515T45.516
FluindioneT45.511T45.512T45.513T45.514T45.515T45.516
Heparin (sodium)T45.511T45.512T45.513T45.514T45.515T45.516
Heparin (sodium)
  »action reverser
T45.511T45.512T45.513T45.514T45.515T45.516
Heparin-fractionT45.511T45.512T45.513T45.514T45.515T45.516
Heparinoid (systemic)T45.511T45.512T45.513T45.514T45.515T45.516
Indandione (derivatives)T45.511T45.512T45.513T45.514T45.515T45.516
Indendione (derivatives)T45.511T45.512T45.513T45.514T45.515T45.516
NicoumaloneT45.511T45.512T45.513T45.514T45.515T45.516
PanwarfinT45.511T45.512T45.513T45.514T45.515T45.516
PhenindioneT45.511T45.512T45.513T45.514T45.515T45.516
PhenprocoumonT45.511T45.512T45.513T45.514T45.515T45.516
SintromT45.511T45.512T45.513T45.514T45.515T45.516
TioclomarolT45.511T45.512T45.513T45.514T45.515T45.516
WarfarinT45.511T45.512T45.513T45.514T45.515T45.516
Warfarin
  »rodenticide
T45.511T45.512T45.513T45.514T45.515T45.516
Warfarin
  »sodium
T45.511T45.512T45.513T45.514T45.515T45.516
XigrisT45.511T45.512T45.513T45.514T45.515T45.516
ZovantT45.511T45.512T45.513T45.514T45.515T45.516

Information for Patients


Medication Errors

Medicines treat infectious diseases, prevent problems from chronic diseases, and ease pain. But medicines can also cause harmful reactions if not used correctly. Errors can happen in the hospital, at the health care provider's office, at the pharmacy, or at home. You can help prevent errors by

Food and Drug Administration


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)