2027 ICD-10-CM Diagnosis Code T43.225SAdverse effect of selective serotonin reuptake inhibitors, sequela

ICD-10-CM T43.225S

CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T43.225S is a billable ICD-10-CM diagnosis code for adverse effect of selective serotonin reuptake inhibitors, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 922 through 923. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as citalopram adverse reaction. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Poisoning/toxic effect/adverse effects/underdosing, sequela.

Code Identity

ICD-10-CM Code

T43.225S

Billable Status

Yes — Valid for Submission

Code Describes

Adverse effect of selective serotonin reuptake inhibitors, sequela

Short Description

Adverse effect of slctv serotonin reuptake inhibtr, sequela

Parent Code

T43.225

Adverse effect of selective serotonin reuptake inhibitors

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 CodeT43.225SAdverse effect of selective serotonin reuptake inhibitors, sequela

Code EditsBilling

Medicare Code Editor checks that affect claim validity for T43.225S.

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)Billing

T43.225S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances (T36-T50).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

Citalopram adverse reaction
Fluoxetine adverse reaction
Fluvoxamine adverse reaction
Nefazodone adverse reaction
Paroxetine adverse reaction
Post selective serotonin re-uptake inhibitor sexual dysfunction
Selective serotonin re-uptake inhibitor adverse reaction
Sertraline adverse reaction
Sexual dysfunction caused by drug
Sexual dysfunction caused by psychoactive substance

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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to T43.225S: its own notes plus those printed at T43, block T36-T50, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.