2024 ICD-10-CM Diagnosis Code T49.91
Poisoning by unspecified topical agent, accidental (unintentional)
- ICD-10-CM Code:
- T49.91
- ICD-10 Code for:
- Poisoning by unsp topical agent, accidental (unintentional)
- Is Billable?
- Not Valid for Submission
- Code Navigator:
T49.91 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of poisoning by unspecified topical agent, accidental (unintentional). The code is not specific and is NOT valid for the year 2024 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.
Unspecified diagnosis codes like T49.91 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Specific Coding Applicable to Poisoning by unsp topical agent, accidental (unintentional)
Non-specific codes like T49.91 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for poisoning by unsp topical agent, accidental (unintentional):
Coding Guidelines
When coding a poisoning or reaction to the improper use of a medication (e.g., overdose, wrong substance given or taken in error, wrong route of administration), first assign the appropriate code from categories T36-T50. The poisoning codes have an associated intent as their 5th or 6th character (accidental, intentional self-harm, assault and undetermined. If the intent of the poisoning is unknown or unspecified, code the intent as accidental intent. The undetermined intent is only for use if the documentation in the record specifies that the intent cannot be determined. Use additional code(s) for all manifestations of poisonings.
The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs (T49). Use the following options for the aplicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Table of Drugs and Chemicals
The code is referenced 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-CM 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 |
|---|---|---|---|---|---|---|
| External medications (skin) (mucous membrane) | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| External medications (skin) (mucous membrane) »dental agent | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| External medications (skin) (mucous membrane) »ENT agent | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| External medications (skin) (mucous membrane) »ophthalmic preparation | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| External medications (skin) (mucous membrane) »specified NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Liniments NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Lotions NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Mucous membrane agents (external) | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Mucous membrane agents (external) »specified NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Skin | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Skin »agents (external) | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Skin »agents (external) »specified NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Skin »test antigen | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Topical action drug NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Topical action drug NEC »ear, nose or throat | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Topical action drug NEC »eye | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Topical action drug NEC »skin | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
| Topical action drug NEC »specified NEC | T49.91 | T49.92 | T49.93 | T49.94 | T49.95 | T49.96 |
Code History
- FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.