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J70.4 ICD-10-CM Code: Drug-induced interstitial lung disorders, unspecified

Compare with another codeCheck this code on a claim

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

Coding at a Glance

Tabular directives
2 Excludes1 · 2 Excludes2 · 1 use-additional code
Risk adjustment
CMS-HCC V22 category 112

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 v44, Appendix B.

  • MS-DRG 205 — OTHER RESPIRATORY SYSTEM DIAGNOSES WITH MCC (MDC 04)
  • MS-DRG 206 — OTHER RESPIRATORY SYSTEM DIAGNOSES WITHOUT MCC (MDC 04)

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 J70.4 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on J70.4 itself; “inherited from” names the category or block whose note applies here.

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).

Excludes2 — Not Included Here

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

Source: inherited from J60-J70

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Coder workflow for J70.4

MedCoder structured workflow — derived from this code’s own official record

Before you code J70.4

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, J70.4 may be the appropriate code. Check the record for detail that supports a more specific sibling — in this subcategory the siblings differ by acute versus chronic. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

    ReviewJ70.0, J70.1, J70.2, J70.3, J70.5, J70.8

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with J70.4. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the record document the detail a more specific sibling code needs?
    Yes → Review the specific siblings in this subcategory.
    No → Continue — J70.4 is appropriate when the documentation goes no further.

    ReviewJ70.0, J70.1, J70.2, J70.3, J70.5, J70.8

  2. Does the documentation support a condition named in J70.4’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewJ84.9, J84.2

Consider J70.4. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Acuity
Acute or chronic as documented; when both are documented and separate codes exist, both are reported with the acute code first (Guidelines I.B.8).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes1 — check before selecting J70.4(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with J70.4: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareJ84.9, J84.2

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of J70.4(2 notes)

    Coding workflow: The conditions named in this note are not included in J70.4. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareJ45, C34

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying J70.4(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with J70.4 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The provider documents the condition in the terms of this code’s title and records no further detail.

Coding question: Is a more specific sibling code supportable?

Path: Review the specific siblings in this subcategory and what each requires the record to state.

Reason: A more specific code needs documentation of the distinguishing element; without it the unspecified code is appropriate, and a provider query is the route to specificity (Guidelines I.A.9.b, I.B.18).

ReviewJ70.0, J70.1, J70.2, J70.3, J70.5, J70.8

Documentation: Both the condition J70.4 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewJ84.9, J84.2

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with J70.4?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Coding context

The comparisons, hierarchy, index entries, guidelines, relationships, risk-adjustment and coverage context a coder commonly needs. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Don’t confuse J70.4 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of J70.4 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • J84.9— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of interstitial pneumonia NOS moves the case to J84.9; the two are not reported together unless documented as unrelated.

    Full comparison: J70.4 vs J84.9 →

  • J84.2— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of lymphoid interstitial pneumonia moves the case to J84.2; the two are not reported together unless documented as unrelated.

    Full comparison: J70.4 vs J84.2 →

  • J45— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of asthma adds J45; it is not part of this code and both may be reported when both are documented.

    Full comparison: J70.4 vs J45 →

  • C34— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of malignant neoplasm of bronchus and lung adds C34; it is not part of this code and both may be reported when both are documented.

    Full comparison: J70.4 vs C34 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Code Overview

Drug-induced interstitial lung disorders, unspecified is a billable ICD-10-CM diagnosis code (J70.4).

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

Indexed Clinical Terms (2)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Decision Points

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

  1. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 2 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 2 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

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name J70.4 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 3 Excludes1 notes: J18 — Pneumonia, unspecified organism, J81 — Pulmonary edema (via J70.-), J84 — Other interstitial pulmonary diseases.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 6 Excludes2 notes: J18 — Pneumonia, unspecified organism (via J70.-), J44.1 — Chronic obstructive pulmonary disease with (acute) exacerbation (via J70.-), J44.9 — Chronic obstructive pulmonary disease, unspecified (via J70.-), J45.909 — Unspecified asthma, uncomplicated (via J70.-), J82 — Pulmonary eosinophilia, not elsewhere classified, J84 — Other interstitial pulmonary diseases (via J70.-).

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

Referenced by 1 Code First instruction: J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere (via J70.-).

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 17 Use Additional Code instructions across 2 chapters: T51 — Toxic effect of alcohol (via J70.-), T51-T65 — Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) (via J70.-), T52 — Toxic effect of organic solvents (via J70.-), T53 — Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons (via J70.-), T54 — Toxic effect of corrosive substances (via J70.-), T55 — Toxic effect of soaps and detergents (via J70.-), T56 — Toxic effect of metals (via J70.-), T57 — Toxic effect of other inorganic substances (via J70.-), T58 — Toxic effect of carbon monoxide (via J70.-), T59 — Toxic effect of other gases, fumes and vapors (via J70.-), T60 — Toxic effect of pesticides (via J70.-), T61 — Toxic effect of noxious substances eaten as seafood (via J70.-), T62 — Toxic effect of other noxious substances eaten as food (via J70.-), T63 — Toxic effect of contact with venomous animals and plants (via J70.-), T64 — Toxic effect of aflatoxin and other mycotoxin food contaminants (via J70.-), T65 — Toxic effect of other and unspecified substances (via J70.-), U07.0 — Vaping-related disorder.

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

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 2 MS-DRGs: DRG 205 (MDC 04), DRG 206 (MDC 04).

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

Clinical classification (AHRQ CCSR):INJ030 — Drug induced or toxic related condition (default); RSP013 — Lung disease due to external agents.

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

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical categories (Drug induced or toxic related condition, Lung disease due to external agents).

J68.3 — Other acute and subacute respiratory conditions due to chemicals, gases, fumes and vapors, J68.4 — Chronic respiratory conditions due to chemicals, gases, fumes and vapors, J68.8 — Other respiratory conditions due to chemicals, gases, fumes and vapors, J68.9 — Unspecified respiratory condition due to chemicals, gases, fumes and vapors, J69.1 — Pneumonitis due to inhalation of oils and essences, J69.8 — Pneumonitis due to inhalation of other solids and liquids, J70.0 — Acute pulmonary manifestations due to radiation, J70.1 — Chronic and other pulmonary manifestations due to radiation, J70.2 — Acute drug-induced interstitial lung disorders, J70.3 — Chronic drug-induced interstitial lung disorders, J70.5 — Respiratory conditions due to smoke inhalation, J70.8 — Respiratory conditions due to other specified external agents, J70.9 — Respiratory conditions due to unspecified external agent, K12.32 — Oral mucositis (ulcerative) due to other drugs, K52.1 — Toxic gastroenteritis and colitis, K59.03 — Drug induced constipation, K59.31 — Toxic megacolon, K71.0 — Toxic liver disease with cholestasis, K71.10 — Toxic liver disease with hepatic necrosis, without coma, K71.11 — Toxic liver disease with hepatic necrosis, with coma, +269 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Pneumonitis”; these codes share that main term but sit in a different category of the Tabular List.

J67.4 — Maltworker's lung (hypersensitivity, maltworker's lung), J67.5 — Mushroom-worker's lung (hypersensitivity, mushroom worker's lung), J67.6 — Maple-bark-stripper's lung (hypersensitivity, maple bark-stripper's lung), J67.7 — Air conditioner and humidifier lung (ventilation), J67.8 — Hypersensitivity pneumonitis due to other organic dusts (wood-dust), J67.9 — Hypersensitivity pneumonitis due to unspecified organic dust (allergic), J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors (crack), J69.0 — Pneumonitis due to inhalation of food and vomit (aspiration), J69.1 — Pneumonitis due to inhalation of oils and essences (due to, oils, essences), J69.8 — Pneumonitis due to inhalation of other solids and liquids (due to, detergent), J82.81 — Chronic eosinophilic pneumonia (eosinophilic), J82.82 — Acute eosinophilic pneumonia (eosinophilic, acute), J84.113 — Idiopathic non-specific interstitial pneumonitis (interstitial, non-specific, idiopathic), J84.114 — Acute interstitial pneumonitis (interstitial, acute), J84.2 — Lymphoid interstitial pneumonia (lymphoid, interstitial), J84.89 — Other specified interstitial pulmonary diseases (cholesterol), J95.4 — Chemical pneumonitis due to anesthesia (postoperative), J95.851 — Ventilator associated pneumonia (due to, ventilator), J98.4 — Other disorders of lung, O29.01 — Aspiration pneumonitis due to anesthesia during pregnancy (postanesthetic, in pregnancy), +10 more

Contextual Map

Every relationship of J70.4 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 J70.4 with these 24 related codes in Claim Check

Hierarchy

Excludes1

Use Additional Code (15)

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Referenced by Code First instructions

Referenced by Use Additional Code instructions (17)

  • T51 — Toxic effect of alcohol[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T51-T65 — Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T52 — Toxic effect of organic solvents[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T53 — Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T54 — Toxic effect of corrosive substances[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T55 — Toxic effect of soaps and detergents[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T56 — Toxic effect of metals[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • T57 — Toxic effect of other inorganic substances[Use Additional Code](via J70.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • and 9 more

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 04 — Diseases and Disorders of the Respiratory System[MDC crossing]: “Diseases and Disorders of the Respiratory System — 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. 4,000 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Disorder (of), lung, interstitial, drug-induced[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Pneumonitis (acute) (primary), chemotherapy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes

Change history

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

Deep reference

Published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 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 — v44 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-derived 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 editorial 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.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "J70.4 — Drug-induced interstitial lung disorders, unspecified." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/j70.4-drug-induced-interstitial-lung-disorders-unspecified

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Drug-induced interstitial lung disorders, unspecified

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, 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 J70.4 in its code family, with their registry titles.

View all codes in the J70 family