ICD-10-CM Code T36.4X6

Underdosing of tetracyclines

Version 2020 Replaced Code Non-Billable Code Underdosing

Not Valid for Submission

T36.4X6 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of underdosing of tetracyclines. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:T36.4X6
Short Description:Underdosing of tetracyclines
Long Description:Underdosing of tetracyclines

Consider the following ICD-10 codes with a higher level of specificity:

  • T36.4X6A - Underdosing of tetracyclines, initial encounter
  • T36.4X6D - Underdosing of tetracyclines, subsequent encounter
  • T36.4X6S - Underdosing of tetracyclines, sequela

Replaced Code

This code was replaced in the 2020 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, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • K59.03 - Drug induced constipation

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances (T36-T50)
      • Systemic antibiotics (T36)

Code History

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

Table of Drugs and Chemicals

The code T36.4X6 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. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. Use as many codes as necessary to describe all reported drugs, medicinal or chemical substances.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
self-harm
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
AchromycinT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Achromycin
  »ophthalmic preparation
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Achromycin
  »topical NEC
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
AureomycinT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Aureomycin
  »ophthalmic preparation
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Aureomycin
  »topical NEC
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
ChlormethylenecyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
ChlortetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
ClomocyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DeclomycinT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DemeclocyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DemethylchlortetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DemethyltetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DMCTT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
DoxycyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
GuamecyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
LymecyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
MeclocyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
MetacyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
MethacyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
MinocyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
OxytetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
PenimepicyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
PolycyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
RolitetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
TerramycinT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
TetracyclineT36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Tetracycline
  »ophthalmic preparation
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6
Tetracycline
  »topical NEC
T36.4X1T36.4X2T36.4X3T36.4X4T36.4X5T36.4X6

Information for Patients


Antibiotics

Antibiotics are powerful medicines that fight bacterial infections. Used properly, antibiotics can save lives. They either kill bacteria or keep them from reproducing. Your body's natural defenses can usually take it from there.

Antibiotics do not fight infections caused by viruses, such as

  • Colds
  • Flu
  • Most coughs and bronchitis
  • Sore throats, unless caused by strep

If a virus is making you sick, taking antibiotics may do more harm than good. Using antibiotics when you don't need them, or not using them properly, can add to antibiotic resistance. This happens when bacteria change and become able to resist the effects of an antibiotic.

When you take antibiotics, follow the directions carefully. It is important to finish your medicine even if you feel better. If you stop treatment too soon, some bacteria may survive and re-infect you. Do not save antibiotics for later or use someone else's prescription.

Centers for Disease Control and Prevention


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