Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter (2024)

Table of Contents
Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter Injury, poisoning and certain other consequences of external causesNoteUse secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause codeType 1 Excludesbirth trauma (P10-P15)obstetric trauma (O70-O71)Use Additionalcode to identify any retained foreign body, if applicable (Z18.-) Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substancesCode First, for adverse effects, the nature of the adverse effect, such as:adverse effect NOS (T88.7)aspirin gastritis (K29.-)blood disorders (D56-D76)contact dermatitis (L23-L25)dermatitis due to substances taken internally (L27.-)nephropathy (N14.0-N14.2)Includesadverse effect of correct substance properly administeredpoisoning by overdose of substancepoisoning by wrong substance given or taken in errorunderdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructedNoteThe drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.Type 1 Excludestoxic reaction to local anesthesia in pregnancy (O29.3-)Type 2 Excludesabuse and dependence of psychoactive substances (F10-F19)abuse of non-dependence-producing substances (F55.-)immunodeficiency due to drugs (D84.821)drug reaction and poisoning affecting newborn (P00-P96)pathological drug intoxication (inebriation) (F10-F19)Use Additionalcode(s) to specify:manifestations of poisoningunderdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)underdosing of medication regimen (Z91.12-, Z91.13-)
  1. ICD-10-CM Codes
    2. ›
  2. S00-T88
    3. ›
  3. T36-T50
    4. ›
  4. T50-
    5. ›
  5. 2024 ICD-10-CM Diagnosis Code T50.905A

Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter (1)

Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter

    2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
  • T50.905A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursem*nt purposes.
  • Short description: Adverse effect of unsp drug/meds/biol subst, init
  • The 2024 edition of ICD-10-CM T50.905A became effective on October 1, 2023.
  • This is the American ICD-10-CM version of T50.905A - other international versions of ICD-10 T50.905A may differ.

The following code(s) above T50.905A contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations

that may be applicable to T50.905A:

  • S00-T88

    2024 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note

    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code

    Type 1 Excludes

    • birth trauma (P10-P15)
    • obstetric trauma (O70-O71)

    Injury, poisoning and certain other consequences of external causes
  • T36-T50

    2024 ICD-10-CM Range T36-T50

    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

    Code First

    • , for adverse effects, the nature of the adverse effect, such as:
    • adverse effect NOS (T88.7)
    • aspirin gastritis (K29.-)
    • blood disorders (D56-D76)
    • contact dermatitis (L23-L25)
    • dermatitis due to substances taken internally (L27.-)
    • nephropathy (N14.0-N14.2)

    Includes

    • adverse effect of correct substance properly administered
    • poisoning by overdose of substance
    • poisoning by wrong substance given or taken in error
    • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed

    Note

    • The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.

    Type 1 Excludes

    • toxic reaction to local anesthesia in pregnancy (O29.3-)

    Type 2 Excludes

    • abuse and dependence of psychoactive substances (F10-F19)
    • abuse of non-dependence-producing substances (F55.-)
    • immunodeficiency due to drugs (D84.821)
    • drug reaction and poisoning affecting newborn (P00-P96)
    • pathological drug intoxication (inebriation) (F10-F19)

    Use Additional

    • code(s) to specify:
    • manifestations of poisoning
    • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
    • underdosing of medication regimen (Z91.12-, Z91.13-)

    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

Approximate Synonyms

  • Adverse drug reaction
  • Adverse effect of dietetic drug
  • Adverse effect of drug
  • Adverse reaction of dietetic drug
  • Adverse reaction to drug
  • Bradycardia, drug induced, in therapeutic use
  • Chronic drug induced gout
  • Chronic drug induced gout of
  • Chronic drug induced gout of ankle
  • Chronic drug induced gout of elbow
  • Chronic drug induced gout of hand
  • Chronic drug induced gout of hip
  • Chronic drug induced gout of knee
  • Chronic drug induced gout of left ankle
  • Chronic drug induced gout of left elbow
  • Chronic drug induced gout of left hand
  • Chronic drug induced gout of left hip
  • Chronic drug induced gout of left knee
  • Chronic drug induced gout of left shoulder
  • Chronic drug induced gout of left wrist
  • Chronic drug induced gout of multiple sites
  • Chronic drug induced gout of right ankle
  • Chronic drug induced gout of right elbow
  • Chronic drug induced gout of right hand
  • Chronic drug induced gout of right hip
  • Chronic drug induced gout of right knee
  • Chronic drug induced gout of right shoulder
  • Chronic drug induced gout of right wrist
  • Chronic drug induced gout of shoulder
  • Chronic drug induced gout of vertebra
  • Chronic drug induced gout of wrist
  • Chronic gout of ankle and/or foot without tophus due to drug
  • Chronic gout of elbow without tophus due to drug
  • Chronic gout of hand without tophus due to drug
  • Chronic gout of hip without tophus due to drug
  • Chronic gout of knee without tophus due to drug
  • Chronic gout of left ankle and/or foot without tophus due to drug
  • Chronic gout of left elbow without tophus due to drug
  • Chronic gout of left hand without tophus due to drug
  • Chronic gout of left hip without tophus due to drug
  • Chronic gout of left knee without tophus due to drug
  • Chronic gout of left shoulder without tophus due to drug
  • Chronic gout of left wrist without tophus due to drug
  • Chronic gout of multiple sites without tophus due to drug
  • Chronic gout of right ankle and/or foot without tophus due to drug
  • Chronic gout of right elbow without tophus due to drug
  • Chronic gout of right hand without tophus due to drug
  • Chronic gout of right hip without tophus due to drug
  • Chronic gout of right knee without tophus due to drug
  • Chronic gout of right shoulder without tophus due to drug
  • Chronic gout of right wrist without tophus due to drug
  • Chronic gout of shoulder without tophus due to drug
  • Chronic gout of vertebra without tophus due to drug
  • Chronic gout of wrist without tophus due to drug
  • Chronic gout without tophus due to drug
  • Chronic tophaceous gout due to drug
  • Chronic tophaceous gout of ankle and/or foot due to drug
  • Chronic tophaceous gout of elbow due to drug
  • Chronic tophaceous gout of hand due to drug
  • Chronic tophaceous gout of hip due to drug
  • Chronic tophaceous gout of knee due to drug
  • Chronic tophaceous gout of left ankle and/or foot due to drug
  • Chronic tophaceous gout of left elbow due to drug
  • Chronic tophaceous gout of left hand due to drug
  • Chronic tophaceous gout of left hip due to drug
  • Chronic tophaceous gout of left knee due to drug
  • Chronic tophaceous gout of left shoulder due to drug
  • Chronic tophaceous gout of left wrist due to drug
  • Chronic tophaceous gout of multiple sites due to drug
  • Chronic tophaceous gout of right ankle and/or foot due to drug
  • Chronic tophaceous gout of right elbow due to drug
  • Chronic tophaceous gout of right hand due to drug
  • Chronic tophaceous gout of right hip due to drug
  • Chronic tophaceous gout of right knee due to drug
  • Chronic tophaceous gout of right shoulder due to drug
  • Chronic tophaceous gout of right wrist due to drug
  • Chronic tophaceous gout of shoulder due to drug
  • Chronic tophaceous gout of vertebra due to drug
  • Chronic tophaceous gout of wrist due to drug
  • Drug induced gout
  • Drug induced gout of ankle
  • Drug induced gout of elbow
  • Drug induced gout of hand
  • Drug induced gout of hip
  • Drug induced gout of knee
  • Drug induced gout of left ankle
  • Drug induced gout of left elbow
  • Drug induced gout of left hand
  • Drug induced gout of left hip
  • Drug induced gout of left knee
  • Drug induced gout of left shoulder
  • Drug induced gout of left wrist
  • Drug induced gout of multiple sites
  • Drug induced gout of right ankle
  • Drug induced gout of right elbow
  • Drug induced gout of right hand
  • Drug induced gout of right hip
  • Drug induced gout of right knee
  • Drug induced gout of right shoulder
  • Drug induced gout of right wrist
  • Drug induced gout of shoulder
  • Drug induced gout of vertebra
  • Drug induced gout of wrist
  • Drug intolerance
  • Drug-induced bradycardia
  • Drug-induced systemic lupus erythematosus
  • Gout of ankle and/or foot due to drug
  • Gout of elbow due to drug
  • Gout of hand due to drug
  • Gout of hip due to drug
  • Gout of knee due to drug
  • Gout of left ankle and/or foot due to drug
  • Gout of left elbow due to drug
  • Gout of left hand due to drug
  • Gout of left hip due to drug
  • Gout of left knee due to drug
  • Gout of left shoulder due to drug
  • Gout of left wrist due to drug
  • Gout of multiple sites due to drug
  • Gout of right ankle and foot due to drug
  • Gout of right elbow due to drug
  • Gout of right hand due to drug
  • Gout of right hip due to drug
  • Gout of right knee due to drug
  • Gout of right shoulder due to drug
  • Gout of right wrist due to drug
  • Gout of shoulder due to drug
  • Gout of vertebra due to drug
  • Gout of wrist due to drug
  • Gout secondary to drug
  • Hot flash due to medication
  • Hot flashes due to medication
  • Lupus, unspecified drug induced

ICD-10-CM T50.905A is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems
  • 917 Poisoning and toxic effects of drugs with mcc
  • 918 Poisoning and toxic effects of drugs without mcc

Convert T50.905A to ICD-9-CM

Code History

See Also
The Four Classifications of Adverse Drug Events

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

ICD-10-CM Codes Adjacent To T50.905A

T50.902S …… sequela

T50.903 Poisoning by unspecified drugs, medicaments and biological substances, assault

T50.903A …… initial encounter

T50.903D …… subsequent encounter

T50.903S …… sequela

T50.904 Poisoning by unspecified drugs, medicaments and biological substances, undetermined

T50.904A …… initial encounter

T50.904D …… subsequent encounter

T50.904S …… sequela

T50.905 Adverse effect of unspecified drugs, medicaments and biological substances

T50.905A …… initial encounter

T50.905D …… subsequent encounter

T50.905S …… sequela

T50.906 Underdosing of unspecified drugs, medicaments and biological substances

T50.906A …… initial encounter

T50.906D …… subsequent encounter

T50.906S …… sequela

T50.91 Poisoning by, adverse effect of and underdosing of multiple unspecified drugs, medicaments and biological substances

T50.911 Poisoning by multiple unspecified drugs, medicaments and biological substances, accidental (unintentional)

T50.911A …… initial encounter

T50.911D …… subsequent encounter

Reimbursem*nt claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter (2024)
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