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T39.96XS ICD-10-CM Code: Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic, sequela

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
4 inclusion terms · 1 Excludes1 · 5 Excludes2 · 4 use-additional codes · 7 code-first instructions

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for T39.96XS in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on T39.96XS itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • 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

Source: inherited from T36-T50

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from T36-T50

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from T36-T50

Code First

Underlying conditions that must be sequenced before this code.

  • 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)
    N14.0-N14.2: N14.0, N14.1, N14.11, N14.19, N14.2

Source: inherited from T36-T50

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • 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)
    Y63.8-Y63.9: Y63.8, Y63.9
  • underdosing of medication regimen (Z91.12-, Z91.13-)

Source: inherited from T36-T50

7th Character Guide

"The appropriate 7th character is to be added to each code from category T39"

  • A — initial encounter
  • D — subsequent encounter
  • S — sequela (this page’s code)

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

T39.96XA, T39.96XD, T39.96XS

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Code Overview

Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic, sequela is a billable ICD-10-CM diagnosis code (T39.96XS).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. A 7th character applies in this family. Confirm the documented encounter matches the character assigned. See the official 7th-character definitions and this code’s variants
  2. Sequencing: 7 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  3. 4 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  4. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  5. 5 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • Principal-diagnosis restriction. The Medicare Code Editor lists this code as unacceptable as a principal diagnosis: it describes a circumstance influencing health status rather than a current illness or injury being treated. It is valid as a secondary diagnosis.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

Other codes that name T39.96XS or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 12 Excludes2 notes across 2 chapters: T48.5 — Poisoning by, adverse effect of and underdosing of other anti-common-cold drugs (via T39.9.-), T80 — Complications following infusion, transfusion and therapeutic injection (via T39.-), T80-T88 — Complications of surgical and medical care, not elsewhere classified (T80-T88) (via T39.-), T81 — Complications of procedures, not elsewhere classified (via T39.-), T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts (via T39.-), T83 — Complications of genitourinary prosthetic devices, implants and grafts (via T39.-), T84 — Complications of internal orthopedic prosthetic devices, implants and grafts (via T39.-), T85 — Complications of other internal prosthetic devices, implants and grafts (via T39.-), T86 — Complications of transplanted organs and tissue (via T39.-), T87 — Complications peculiar to reattachment and amputation (via T39.-), T88 — Other complications of surgical and medical care, not elsewhere classified (via T39.-), Y63 — Failure in dosage during surgical and medical care (via T39.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 20 Code First instructions across 13 chapters: D64.2 — Secondary sideroblastic anemia due to drugs and toxins (via T39.-), E03.2 — Hypothyroidism due to medicaments and other exogenous substances (via T39.-), E09 — Drug or chemical induced diabetes mellitus (via T39.-), F02 — Dementia in other diseases classified elsewhere (via T39.-), G92.8 — Other toxic encephalopathy (via T39.-), G92.9 — Unspecified toxic encephalopathy (via T39.-), H35.38 — Toxic maculopathy (via T39.-), H91.0 — Ototoxic hearing loss (via T39.-), I42.7 — Cardiomyopathy due to drug and external agent (via T39.-), K22.1 — Ulcer of esophagus (via T39.-), K71 — Toxic liver disease (via T39.-), L53.0 — Toxic erythema (via T39.-), M34.2 — Systemic sclerosis induced by drug and chemical (via T39.-), N14 — Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (via T39.-), P58.4 — Neonatal jaundice due to drugs or toxins transmitted from mother or given to newborn (via T39.-), Z91.12 — Patient's intentional underdosing of medication regimen (via T39.-), Z91.13 — Patient's unintentional underdosing of medication regimen (via T39.-), Z91.14 — Patient's other noncompliance with medication regimen (via T39.-), Z91.A2 — Caregiver's intentional underdosing of patient's medication regimen (via T39.-), Z91.A3 — Caregiver's unintentional underdosing of patient's medication regimen (via T39.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 99 Use Additional Code instructions across 15 chapters: D46 — Myelodysplastic syndromes (via T39.-), D52.1 — Drug-induced folate deficiency anemia (via T39.-), D59.0 — Drug-induced autoimmune hemolytic anemia (via T39.-), D59.2 — Drug-induced nonautoimmune hemolytic anemia (via T39.-), D59.39 — Other hemolytic-uremic syndrome (via T39.-), D61.1 — Drug-induced aplastic anemia (via T39.-), D64.2 — Secondary sideroblastic anemia due to drugs and toxins (via T39.-), D70.2 — Other drug-induced agranulocytosis (via T39.-), D72.12 — Drug rash with eosinophilia and systemic symptoms syndrome (via T39.-), D84.821 — Immunodeficiency due to drugs (via T39.-), D89.3 — Immune reconstitution syndrome (via T39.-), E03.2 — Hypothyroidism due to medicaments and other exogenous substances (via T39.-), E06.4 — Drug-induced thyroiditis (via T39.-), E09 — Drug or chemical induced diabetes mellitus (via T39.-), E16.0 — Drug-induced hypoglycemia without coma (via T39.-), E22.1 — Hyperprolactinemia (via T39.-), E23.1 — Drug-induced hypopituitarism (via T39.-), E24.2 — Drug-induced Cushing's syndrome (via T39.-), E25.8 — Other adrenogenital disorders (via T39.-), E27.3 — Drug-induced adrenocortical insufficiency (via T39.-), +79 more.

These codes instruct coders to additionally report this code when it applies.

Referenced by 1 Code Also instruction: Z91.1 — Patient's noncompliance with medical treatment and regimen (via T39.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Potential MS-DRG participation — not a DRG assignment.

Named in the grouper logic of 2 MS-DRGs: DRG 949 (MDC 23), DRG 950 (MDC 23).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):INJ075 — Poisoning/toxic effect/adverse effects/underdosing, sequela.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Principal diagnosis restriction (Medicare Code Editor)

Not acceptable as a principal diagnosis on an inpatient claim.

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

T39.96XA — Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic, initial encounterCompare T39.96XS vs T39.96XA →, T39.96XD — Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic, subsequent encounter

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Poisoning/toxic effect/adverse effects/underdosing, sequela).

+1606 more

Contextual Map

Every relationship of T39.96XS in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run T39.96XS with these 24 related codes in Claim Check

Hierarchy

Referenced by Excludes2 notes (12)

Referenced by Code First instructions (20)

Referenced by Use Additional Code instructions (99)

  • D46 — Myelodysplastic syndromes[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D52.1 — Drug-induced folate deficiency anemia[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D59.0 — Drug-induced autoimmune hemolytic anemia[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D59.2 — Drug-induced nonautoimmune hemolytic anemia[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D59.39 — Other hemolytic-uremic syndrome[Use Additional Code](via T39.-): “code, if applicable, for adverse effect to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D61.1 — Drug-induced aplastic anemia[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D64.2 — Secondary sideroblastic anemia due to drugs and toxins[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • D70.2 — Other drug-induced agranulocytosis[Use Additional Code](via T39.-): “code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • and 91 more

Referenced by Code Also instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

Does T39.96XS require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T39.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Underdosing of unspecified nonopioid analgesic, antipyretic and antirheumatic, sequela

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T39.96XS in its code family, with their registry titles.

View all codes in the T39 family