2026 ICD-10-CM Diagnosis Code T43.695AAdverse effect of other psychostimulants, initial encounter

ICD-10-CM Codes›S00–T88›T36-T50›T43

ICD-10-CM T43.695A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T43.695A is a billable ICD-10-CM diagnosis code for adverse effect of other psychostimulants, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 917 through 918. The code is not accepted as a principal diagnosis by the Medicare Code Editor. Coders also document this condition as amphetamine group adverse reaction. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Adverse effects of drugs and medicaments, initial encounter; and Stimulant-related disorders.

Code Identity

ICD-10-CM Code
T43.695A
Billable Status
Yes — Valid for Submission
Code Describes
Adverse effect of other psychostimulants, initial encounter
Short Description
Adverse effect of other psychostimulants, initial encounter
Same as the full description in the CMS dataset.
Parent Code
T43.695
Adverse effect of other psychostimulants

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT36-T50Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
CategoryT43Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
This CodeT43.695AAdverse effect of other psychostimulants, initial encounter

Code EditsBilling

Medicare Code Editor checks that affect claim validity for T43.695A.

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.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Amphetamine group adverse reaction
  • Prolintane adverse reaction

Coding GuidelinesGuidance

When coding an adverse effect of a drug that has been correctly prescribed and properly administered, assign the appropriate code for the nature of the adverse effect followed by the appropriate code for the adverse effect of the drug.

The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified (T43). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ028
Adverse effects of drugs and medicaments, initial encounter
Default principal diagnosis: inpatient No · outpatient Yes
CCSR MBD021
Stimulant-related disorders
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Meclofenoxate

    an ester of dimethylaminoethanol and para-chlorophenoxyacetic acid.

Table of Drugs and ChemicalsClinical

Substances in the Table of Drugs and Chemicals that reference this code family. Always confirm in the Tabular List before coding.

SubstanceAccidentalSelf-harmAssaultUndeter­minedAdverse
Effect		Under­dosing
EtryptamineT43.691T43.692T43.693T43.694T43.695T43.696
FencamfamineT43.691T43.692T43.693T43.694T43.695T43.696
FenetyllineT43.691T43.692T43.693T43.694T43.695T43.696
MeclofenoxateT43.691T43.692T43.693T43.694T43.695T43.696
PipradrolT43.691T43.692T43.693T43.694T43.695T43.696
PreludinT43.691T43.692T43.693T43.694T43.695T43.696
ProlintaneT43.691T43.692T43.693T43.694T43.695T43.696

Patient EducationClinical

Drug Reactions

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, such as drug interactions, side effects, and allergies.

The full article covers:

  • What is a drug interaction?
  • What are side effects?
  • What are drug allergies?
  • How can I stay safe when taking medicines?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T43.695A to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
995.29 Adv eff med/biol NEC/NOS
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
E939.7 Adv eff psychostimulants
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T43.695AOverview

Is T43.695A (Adverse effect of other psychostimulants) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report adverse effect of other psychostimulants, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T43.695A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for adverse effect of other psychostimulants, such as an emergency visit or first evaluation.

What MS-DRG does T43.695A group to?

On inpatient claims, adverse effect of other psychostimulants, initial encounter maps to MS-DRG 917, 918, with relative weights from 0.8571 to 1.5684 depending on complications. Higher weights mean higher Medicare reimbursement.

Can T43.695A be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because adverse effect of other psychostimulants, initial encounter describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of T43.695A?

Under the General Equivalence Mappings, adverse effect of other psychostimulants, initial encounter converts to ICD-9-CM 995.29 (adv eff med/biol NEC/NOS) and E939.7 (adv eff psychostimulants). The mapping is approximate, so confirm the match fits the documentation.

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.