ICD-10 Code T36.0X

Poisoning by, adverse effect of and underdosing of penicillins

Version 2019 Replaced Code Non-Billable Code
Short Description:Penicillins
Long Description:Poisoning by, adverse effect of and underdosing of penicillins

Not Valid for Submission

ICD-10 T36.0X is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of poisoning by, adverse effect of and underdosing of penicillins. The code is NOT valid for the year 2019 for the submission of HIPAA-covered transactions.

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

  • T36.0X1 - Poisoning by penicillins, accidental (unintentional)
  • T36.0X1A - Poisoning by penicillins, accidental (unintentional), initial encounter
  • T36.0X1D - Poisoning by penicillins, accidental (unintentional), subsequent encounter
  • T36.0X1S - Poisoning by penicillins, accidental (unintentional), sequela
  • T36.0X2 - Poisoning by penicillins, intentional self-harm
  • T36.0X2A - Poisoning by penicillins, intentional self-harm, initial encounter
  • T36.0X2D - Poisoning by penicillins, intentional self-harm, subsequent encounter
  • T36.0X2S - Poisoning by penicillins, intentional self-harm, sequela
  • T36.0X3 - Poisoning by penicillins, assault
  • T36.0X3A - Poisoning by penicillins, assault, initial encounter
  • T36.0X3D - Poisoning by penicillins, assault, subsequent encounter
  • T36.0X3S - Poisoning by penicillins, assault, sequela
  • T36.0X4 - Poisoning by penicillins, undetermined
  • T36.0X4A - Poisoning by penicillins, undetermined, initial encounter
  • T36.0X4D - Poisoning by penicillins, undetermined, subsequent encounter
  • T36.0X4S - Poisoning by penicillins, undetermined, sequela
  • T36.0X5 - Adverse effect of penicillins
  • T36.0X5A - Adverse effect of penicillins, initial encounter
  • T36.0X5D - Adverse effect of penicillins, subsequent encounter
  • T36.0X5S - Adverse effect of penicillins, sequela
  • T36.0X6 - Underdosing of penicillins
  • T36.0X6A - Underdosing of penicillins, initial encounter
  • T36.0X6D - Underdosing of penicillins, subsequent encounter
  • T36.0X6S - Underdosing of penicillins, sequela

Deleted Code

This code was deleted in the 2019 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, 2018. This code was replaced for the FY 2019 (October 1, 2018 - September 30, 2019).

  • 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)

Information for Medical Professionals

Clinical Information


  • Penicillins: A group of antibiotics that contain 6-aminopenicillanic acid with a side chain attached to the 6-amino group. The penicillin nucleus is the chief structural requirement for biological activity. The side-chain structure determines many of the antibacterial and pharmacological characteristics. (Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1065)


  • Antibiotics, Penicillin

Information for Patients


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

  • Central venous catheters - ports (Medical Encyclopedia)

[Read More]

Drug Reactions

Also called: Side effects

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions.

One problem is interactions, which may occur between

  • Two drugs, such as aspirin and blood thinners
  • Drugs and food, such as statins and grapefruit
  • Drugs and supplements, such as ginkgo and blood thinners
  • Drugs and diseases, such as aspirin and peptic ulcers

Interactions can change the actions of one or both drugs. The drugs might not work, or you could get side effects.

Side effects are unwanted effects caused by the drugs. Most are mild, such as a stomach aches or drowsiness, and go away after you stop taking the drug. Others can be more serious.

Drug allergies are another type of reaction. They can be mild or life-threatening. Skin reactions, such as hives and rashes, are the most common type. Anaphylaxis, a serious allergic reaction, is more rare.

When you start a new prescription or over-the-counter medication, make sure you understand how to take it correctly. Know which other medications and foods you need to avoid. Ask your health care provider or pharmacist if you have questions.

  • Angioedema (Medical Encyclopedia)
  • Drug allergies (Medical Encyclopedia)
  • Drug-induced diarrhea (Medical Encyclopedia)
  • Drug-induced tremor (Medical Encyclopedia)
  • Taking multiple medicines safely (Medical Encyclopedia)

[Read More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.