2024 ICD-10-CM Diagnosis Code T49.4X6S

Underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations, sequela

ICD-10-CM Code:
T49.4X6S
ICD-10 Code for:
Underdosing of keratolyt/keratplst/hair trmt drug, sequela
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
      (T36-T50)
      • Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs
        (T49)

T49.4X6S is a billable diagnosis code used to specify a medical diagnosis of underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations, sequela. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

T49.4X6S is a sequela code, includes a 7th character and should be used for complications that arise as a direct result of a condition like underdosing of keratolytics keratoplastics and other hair treatment drugs and preparations. According to ICD-10-CM Guidelines a "sequela" code should be used for chronic or residual conditions that are complications of an initial acute disease, illness or injury. The most common sequela is pain. Usually, two diagnosis codes are needed when reporting sequela. The first code describes the nature of the sequela while the second code describes the sequela or late effect.

Clinical Classification

Clinical Information

  • Allantoin

    a urea hydantoin that is found in urine and plants and is used in dermatological preparations.
  • Anthralin

    an anthracene derivative that disrupts mitochondria function and structure and is used for the treatment of dermatoses, especially psoriasis. it may cause folliculitis.
  • Capsaicin

    an alkylamide found in capsicum that acts at trpv cation channels.
  • Capsicum

    a plant genus of the family solanaceae. the hot peppers yield capsaicin, which activates vanilloid receptors. several varieties have sweet or pungent edible fruits that are used as vegetables when fresh and spices when the pods are dried.
  • Anacardic Acids

    a group of 6-alkyl salicylic acids that are found in anacardium and known for causing contact dermatitis.
  • Salicylates

    the salts or esters of salicylic acids, or salicylate esters of an organic acid. some of these have analgesic, antipyretic, and anti-inflammatory activities by inhibiting prostaglandin synthesis.
  • Salicylic Acid

    a compound obtained from the bark of the white willow and wintergreen leaves. it has bacteriostatic, fungicidal, and keratolytic actions.

Coding Guidelines

Underdosing refers to taking less of a medication than is prescribed by a provider or a manufacturer's instruction. Codes for underdosing should never be assigned as principal or first-listed codes. If a patient has a relapse or exacerbation of the medical condition for which the drug is prescribed because of the reduction in dose, then the medical condition itself should be coded.

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

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)

T49.4X6S is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert T49.4X6S to ICD-9-CM

  • ICD-9-CM Code: -
    No Map Flag -

Table of Drugs and Chemicals

The parent code T49.4X6 of the current diagnosis 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
AllantoinT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Alum (medicinal)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Alum (medicinal)
  »nonmedicinal (ammonium) (potassium)
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
AnthralinT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
AntiseborrheicsT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Bleaching agent (medicinal)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
ButantroneT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Cade oilT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
CapsicumT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Carbazochrome (salicylate) (sodium sulfonate)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
ChlorothymolT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
ChloroxineT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
ChrysarobinT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
CollagenaseT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Corn curesT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
DepilatoryT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Desloughing agentT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Diachylon plasterT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Dimethylamine sulfateT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
DithranolT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
EuresolT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Flowers of sulfurT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Fumaric acidT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
HairT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Hair
  »dye
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Hair
  »preparation NEC
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
HemostypticT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
IchthyolT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Keratolytic drug NECT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Keratolytic drug NEC
  »anthracene
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Keratoplastic NECT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Lassar's pasteT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
MonobenzoneT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Podophyllum (resin)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Preparation, localT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Pyrithione zincT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
RubefacientT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Salicylic acidT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Salicylic acid
  »with benzoic acid
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Salicylic acid
  »congeners
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Salicylic acid
  »derivative
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Salicylic acid
  »salts
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Savin (oil)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
SelsunT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »acid
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »dioxide (gas)
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »ether
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »hydrogen
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »medicinal (keratolytic) (ointment) NEC
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »ointment
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »pesticide (vapor)
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Sulfur, sulfurated, sulfuric, sulfurous, sulfuryl (compounds NEC) (medicinal)
  »vapor NEC
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
ThioglycolateT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
TioxoloneT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
TriacetoxyanthraceneT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
TrioxysalenT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Vleminckx's solutionT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
XenysalateT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6

Patient Education


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:

  • Knowing your medicines. When you get a prescription, ask the name of the medicine and check to make sure that the pharmacy gave you the right medicine. Make sure that you understand how often you should take the medicine and how long you should take it.
  • Keeping a list of medicines.
    • Write down all of the medicines that you are taking, including the names of your medicines, how much you take, and when you take them. Make sure to include any over-the-counter medicines, vitamins, supplements, and herbs that you take.
    • List the medicines that you are allergic to or that have caused you problems in the past.
    • Take this list with you every time you see a health care provider.
  • Reading medicine labels and following the directions. Don't just rely on your memory - read the medication label every time. Be especially careful when giving medicines to children.
  • Asking questions. If you don't know the answers to these questions, ask your health care provider or pharmacist:
    • Why am I taking this medicine?
    • What are the common side effects?
    • What should I do if I have side effects?
    • When should I stop this medicine?
    • Can I take this medicine with the other medicines and supplements on my list?
    • Do I need to avoid certain foods or alcohol while taking this medicine?

Food and Drug Administration


[Learn More in MedlinePlus]

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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.