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L27.2 ICD-10-CM Code: Dermatitis due to ingested food

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

Coding at a Glance

Tabular directives
1 Excludes1 · 14 Excludes2

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.

  • MS-DRG 606 — MINOR SKIN DISORDERS WITH MCC (MDC 09)
  • MS-DRG 607 — MINOR SKIN DISORDERS WITHOUT MCC (MDC 09)

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 L27.2 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on L27.2 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).

Source: inherited from L27

Excludes2 — Not Included Here

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

Coder workflow for L27.2

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

Before you code L27.2

  1. L27.2’s title joins a condition with an associated condition or complication. Confirm each component is documented. Where the classification presumes the link through the “with” convention, only a provider statement that the conditions are unrelated defeats it. A combination code is assigned only when it fully identifies the documented conditions; a required second code for the stage, type or manifestation is still reported when the notes ask for it (Guidelines I.B.9, I.A.15).

    Guide: Combination codes →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with L27.2. 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 documentation support a condition named in L27.2’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.

    ReviewT78.40

Consider L27.2. Then 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).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).

Official instructions as workflow

  • Excludes1 — check before selecting L27.2(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with L27.2: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareT78.40

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

  • Excludes2 — not part of L27.2(14 notes)

    Coding workflow: The conditions named in this note are not included in L27.2. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareL23.6, L24.6, L25.4, L56.1, L56.0, L50

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

Coding decision scenarios

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

Documentation: Both the condition L27.2 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).

ReviewT78.40

Documentation: Only one of the components this code’s title joins is documented.

Coding question: Is L27.2 supported?

Path: Review the code for the documented component on its own.

Reason: A combination code is assigned only when it fully identifies the documented conditions; otherwise the documented component takes its own code (Guidelines I.B.9).

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.

Code Overview

Dermatitis due to ingested food is a billable ICD-10-CM diagnosis code (L27.2).

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 (12)

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.

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 structured relationships — computed from published CMS and AHRQ datasets

Other codes that name L27.2 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: T61 — Toxic effect of noxious substances eaten as seafood, T62 — Toxic effect of other noxious substances eaten as food, T78.4 — Other and unspecified allergy (via L27.-).

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

Referenced by 7 Excludes2 notes across 2 chapters: L23 — Allergic contact dermatitis (via L27.-), L23.6 — Allergic contact dermatitis due to food in contact with the skin, L24 — Irritant contact dermatitis (via L27.-), L24.6 — Irritant contact dermatitis due to food in contact with skin, L25 — Unspecified contact dermatitis (via L27.-), L25.4 — Unspecified contact dermatitis due to food in contact with skin, T78.1 — Other adverse food reactions, not elsewhere classified.

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

Referenced by 21 Code First instructions: T36 — Poisoning by, adverse effect of and underdosing of systemic antibiotics (via L27.-), T36-T39 — Antibiotics & Anti-infectives (T36-T39) (via L27.-), T36-T50 — Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (via L27.-), T37 — Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics (via L27.-), T38 — Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified (via L27.-), T39 — Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics (via L27.-), T40 — Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens] (via L27.-), T40-T41 — Analgesics & Antipyretics (T40-T41) (via L27.-), T41 — Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases (via L27.-), T42 — Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs (via L27.-), T42-T43 — Anticonvulsants & Psychotropics (T42-T43) (via L27.-), T43 — Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified (via L27.-), T44 — Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system (via L27.-), T44-T46 — Cardiovascular & Gastrointestinal (T44-T46) (via L27.-), T45 — Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified (via L27.-), T46 — Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system (via L27.-), T47 — Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system (via L27.-), T47-T50 — Hormones & Systemic Agents (T47-T50) (via L27.-), T48 — Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system (via L27.-), T49 — Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs (via L27.-), +1 more.

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.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 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 606 (MDC 09), DRG 607 (MDC 09).

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

Clinical classification (AHRQ CCSR):SKN002 — Other specified inflammatory condition of skin (default); INJ031 — Allergic reactions.

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 (Other specified inflammatory condition of skin, Allergic reactions).

L23.4 — Allergic contact dermatitis due to dyes, L23.5 — Allergic contact dermatitis due to other chemical products, L23.6 — Allergic contact dermatitis due to food in contact with the skin, L23.7 — Allergic contact dermatitis due to plants, except food, L23.81 — Allergic contact dermatitis due to animal (cat) (dog) dander, L23.89 — Allergic contact dermatitis due to other agents, L23.9 — Allergic contact dermatitis, unspecified cause, L26 — Exfoliative dermatitis, L27.0 — Generalized skin eruption due to drugs and medicaments taken internally, L27.1 — Localized skin eruption due to drugs and medicaments taken internally, L27.8 — Dermatitis due to other substances taken internally, L27.9 — Dermatitis due to unspecified substance taken internally, L28.0 — Lichen simplex chronicus, L28.1 — Prurigo nodularis, L28.2 — Other prurigo, L29.0 — Pruritus ani, L29.1 — Pruritus scroti, L29.2 — Pruritus vulvae, L29.3 — Anogenital pruritus, unspecified, L29.8 — Other pruritus, +233 more

Same Index main term, other category

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

L24.B3 — Irritant contact dermatitis related to fecal or urinary stoma or fistula (contact, irritant, related to, colostomy), L25.0 — Unspecified contact dermatitis due to cosmetics (due to, cosmetics), L25.1 — Unspecified contact dermatitis due to drugs in contact with skin (contact, due to, drugs in contact with skin), L25.2 — Unspecified contact dermatitis due to dyes (due to, dyes), L25.3 — Unspecified contact dermatitis due to other chemical products (due to, cement), L25.4 — Unspecified contact dermatitis due to food in contact with skin (due to, food, in contact with skin), L25.5 — Unspecified contact dermatitis due to plants, except food (due to, plants NEC), L25.8 — Unspecified contact dermatitis due to other agents (due to, specified agent NEC), L25.9 — Unspecified contact dermatitis, unspecified cause (contact), L26 — Exfoliative dermatitis (exfoliative, exfoliativa), L28.0 — Lichen simplex chronicus (lichenified NEC), L30.0 — Nummular dermatitis (nummular), L30.1 — Dyshidrosis [pompholyx] (dyshydrotic), L30.3 — Infective dermatitis (infective), L30.4 — Erythema intertrigo (friction), L30.8 — Other specified dermatitis (hiemalis), L30.9 — Dermatitis, unspecified, L40.2 — Acrodermatitis continua (repens), L50.0 — Allergic urticaria (urticaria), L52 — Erythema nodosum (contusiformis), +150 more

Contextual Map

Every relationship of L27.2 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 L27.2 with these 18 related codes in Claim Check

Hierarchy

Excludes2

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Referenced by Code First instructions (21)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast[MDC crossing]: “Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast — 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. 7,376 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (12)

  • Allergy, allergic (reaction) (to), milk protein, dermatitis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, cereal (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, coffee (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, fish (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, flour (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, food (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, fruit (ingested)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Dermatitis (eczematous), due to, ingestion, ingested substance, food[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • and 4 more

Nearest codes

Change history

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

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

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. "L27.2 — Dermatitis due to ingested food." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/l27.2-dermatitis-due-to-ingested-food

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Dermatitis due to ingested food

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 L27.2 in its code family, with their registry titles.

View all codes in the L27 family