2027 ICD-10-CM Diagnosis Code T43.215SAdverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela

ICD-10-CM Codes›S00–T88›T36-T50›T43

ICD-10-CM T43.215S
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T43.215S is a billable ICD-10-CM diagnosis code for adverse effect of selective serotonin and norepinephrine 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 adverse reaction caused by norepinephrine reuptake inhibitor and serotonin reuptake inhibitor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Poisoning/toxic effect/adverse effects/underdosing, sequela.

Code Identity

ICD-10-CM Code
T43.215S
Billable Status
Yes — Valid for Submission
Code Describes
Adverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela
Short Description
Advrs effect of slctv seroton/norepineph reup inhibtr, sqla
Parent Code
Adverse effect of selective serotonin and norepinephrine 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 CodeT43.215SAdverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela

Code EditsBilling

Medicare Code Editor checks that affect claim validity for T43.215S.

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

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adverse reaction caused by norepinephrine reuptake inhibitor and serotonin reuptake inhibitor
  • Norepinephrine reuptake inhibitor adverse reaction
  • Selective serotonin re-uptake inhibitor adverse reaction
  • Trazodone adverse reaction
  • Venlafaxine 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 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 T43.215S: 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.

Includes

Further defines, or gives examples of, the content of the category.

From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • 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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • toxic reaction to local anesthesia in pregnancy (O29.3-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified applies to 354 codes
  • appetite depressants (T50.5-)
  • barbiturates (T42.3-)
  • benzodiazepines (T42.4-)
  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
  • methaqualone (T42.6-)
  • psychodysleptics [hallucinogens] (T40.7-T40.9-)
From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • 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)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Code First

The underlying condition named in the note is sequenced before this code.

From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • 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-)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • 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.
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • 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
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified applies to 354 codes
  • The appropriate 7th character is to be added to each code from category T43
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela this code

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name T43.215S, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and T43.215S is one of the conditions named.

  • G90.81 Serotonin syndrome
    selective serotonin and norepinephrine reuptake inhibitors [SSNRI] (T43.21 with sixth character 1-4) names T43.21, which includes this code

Use Additional Code 1

These codes say to use an additional code from the note, and T43.215S is one of the codes named.

  • G90.81 Serotonin syndrome
    selective serotonin and norepinephrine reuptake inhibitors [SSNRI] (T43.215) names T43.215, which includes this code

Clinical ClassificationClinical

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

CCSR INJ075
Poisoning/toxic effect/adverse effects/underdosing, sequela
Default principal diagnosis: inpatient No · outpatient Yes

Clinical InformationClinical

  • Trazodone

    a serotonin uptake inhibitor that is used as an antidepressive agent. it has been shown to be effective in patients with major depressive disorders and other subsets of depressive disorders. it is generally more useful in depressive disorders associated with insomnia and anxiety. this drug does not aggravate psychotic symptoms in patients with schizophrenia or schizoaffective disorders. (from ama drug evaluations annual, 1994, p309)

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
Antidepressant::selective serotonin norepinephrine reuptake inhibitorT43.211T43.212T43.213T43.214T43.215T43.216
Antidepressant::triazolopyridineT43.211T43.212T43.213T43.214T43.215T43.216
TrazodoneT43.211T43.212T43.213T43.214T43.215T43.216
VenlafaxineT43.211T43.212T43.213T43.214T43.215T43.216

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 T43.215S to ICD-9-CMHistory

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

ICD-9-CM
909.5 Lte efct advrs efct drug
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
E939.0 Adv eff antidepressants
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About T43.215SOverview

Is T43.215S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report adverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character S in T43.215S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the adverse effect of selective serotonin and norepinephrine reuptake inhibitors itself has resolved, not the original event.

What MS-DRG does T43.215S group to?

On inpatient claims, adverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela maps to MS-DRG 923, 922, with relative weights from 0.9980 to 1.6248 depending on complications. Higher weights mean higher Medicare reimbursement.

Can T43.215S be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because adverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is T43.215S exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for adverse effect of selective serotonin and norepinephrine reuptake inhibitors, sequela on inpatient claims. The code appears in the Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances (T36-T50) range of the CMS exempt list.