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ICD-10 Code T88.7: Unspecified adverse effect of drug or medicament

T88.7 is a billable ICD-10 diagnosis code used to classify Unspecified adverse effect of drug or medicament in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

When is it used?

  • May be used when a clinician documents unspecified adverse effect of drug or medicament in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
19Injury, poisoning and certain other consequences of external causes (S00-T88)
block
T07-T88Injury, poisoning and certain other consequences of external causes
block
T80-T88Complications of surgical and medical care, not elsewhere classified
category
T88Other complications of surgical and medical care, not elsewhere classified
currentT88

Official coding notes

Inclusion terms
  • Drug hypersensitivity NOS
  • Drug reaction NOS
Applicable to
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excludes1 (do not code together)
  • specified adverse effects of drugs and medicaments (A00-R94 and T80-T88.6, T88.8)
Use additional code
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Emergency Medicine SpecialistOrthopedic Specialist

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
T88.7

Common synonyms

Unspecified adverse effect of drug or medicament

Frequently asked questions

Code details

CodeT88.7
SystemICD10
Display nameUnspecified adverse effect of drug or medicament
ChapterInjury, poisoning and certain other consequences of external causes (S00-T88)
BlockComplications of surgical and medical care, not elsewhere classified

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Complication(s) (from) (of)Complication(s) (from) (of)DamageEffect, adverseHypersensitive, hypersensitiveness, hypersensitivityReaction

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code T88.7 for Unspecified adverse effect of drug or medicament | HealthAssure