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J82.81 ICD-10-CM Code: Chronic eosinophilic pneumonia

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

Coding at a Glance

Tabular directives
1 inclusion term · 5 Excludes2
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 111 · RxHCC V08 category 229

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 196 — INTERSTITIAL LUNG DISEASE WITH MCC (MDC 04)
  • MS-DRG 197 — INTERSTITIAL LUNG DISEASE WITH CC (MDC 04)
  • MS-DRG 198 — INTERSTITIAL LUNG DISEASE WITHOUT CC/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.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders

Other models: CMS-HCC V22 HCC 111 · RxHCC V08 HCC 229

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for J82.81 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 J82.81 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Eosinophilic pneumonia, NOS

Excludes2 — Not Included Here

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

Source: inherited from J82

Coder workflow for J82.81

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

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).

Official instructions as workflow

  • Excludes2 — not part of J82.81(5 notes)

    Coding workflow: The conditions named in this note are not included in J82.81. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareB44, R91.8

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

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

Chronic eosinophilic pneumonia is a billable ICD-10-CM diagnosis code (J82.81).

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 (5)

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

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

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 J82.81 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 1 Excludes2 note: D72.1 — Eosinophilia (via J82.-).

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

Referenced by 1 Code First instruction: J93.12 — Secondary spontaneous pneumothorax.

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: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 4 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 196 (MDC 04), DRG 197 (MDC 04), DRG 198 (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):RSP016 — Other specified and unspecified lower respiratory disease (default).

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 process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

J82.82 — Acute eosinophilic pneumonia, J82.83 — Eosinophilic asthma, J82.89 — Other pulmonary eosinophilia, not elsewhere classified

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders) for risk-adjusted payment.

J67.7 — Air conditioner and humidifier lung, J67.8 — Hypersensitivity pneumonitis due to other organic dusts, J67.9 — Hypersensitivity pneumonitis due to unspecified organic dust, J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors, J68.1 — Pulmonary edema due to chemicals, gases, fumes and vapors, J68.2 — Upper respiratory inflammation due to chemicals, gases, fumes and vapors, not elsewhere classified, 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, J84.01 — Alveolar proteinosis, J84.02 — Pulmonary alveolar microlithiasis, J84.03 — Idiopathic pulmonary hemosiderosis, J84.09 — Other alveolar and parieto-alveolar conditions, J84.10 — Pulmonary fibrosis, unspecified, J84.111 — Idiopathic interstitial pneumonia, not otherwise specified, J84.113 — Idiopathic non-specific interstitial pneumonitis, J84.114 — Acute interstitial pneumonitis, J84.115 — Respiratory bronchiolitis interstitial lung disease, J84.116 — Cryptogenic organizing pneumonia, +58 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Lung Transplant Status/Complications, Cystic Fibrosis, Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis, Severe Persistent Asthma

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Other specified and unspecified lower respiratory disease).

B44.1 — Other pulmonary aspergillosis, B45.0 — Pulmonary cryptococcosis, B46.0 — Pulmonary mucormycosis, B67.1 — Echinococcus granulosus infection of lung, J18.2 — Hypostatic pneumonia, unspecified organism, J22 — Unspecified acute lower respiratory infection, J4A.0 — Restrictive allograft syndrome, J81.0 — Acute pulmonary edema, J81.1 — Chronic pulmonary edema, J82 — Pulmonary eosinophilia, not elsewhere classified, J82.82 — Acute eosinophilic pneumonia, J82.83 — Eosinophilic asthma, J82.89 — Other pulmonary eosinophilia, not elsewhere classified, J84.01 — Alveolar proteinosis, J84.02 — Pulmonary alveolar microlithiasis, J84.03 — Idiopathic pulmonary hemosiderosis, J84.09 — Other alveolar and parieto-alveolar conditions, J84.10 — Pulmonary fibrosis, unspecified, J84.111 — Idiopathic interstitial pneumonia, not otherwise specified, J84.112 — Idiopathic pulmonary fibrosis, +59 more

Same Index main term, other category

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

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 (lipid, lipoid), J69.8 — Pneumonitis due to inhalation of other solids and liquids (due to, detergent), J70.0 — Acute pulmonary manifestations due to radiation (radiation), J70.2 — Acute drug-induced interstitial lung disorders (chemotherapy, acute), J70.3 — Chronic drug-induced interstitial lung disorders (chemotherapy, chronic), J70.4 — Drug-induced interstitial lung disorders, unspecified (chemotherapy), J84.111 — Idiopathic interstitial pneumonia, not otherwise specified (interstitial, chronic), J84.112 — Idiopathic pulmonary fibrosis (interstitial, usual), J84.113 — Idiopathic non-specific interstitial pneumonitis (interstitial, non-specific, idiopathic), J84.114 — Acute interstitial pneumonitis (interstitial, acute), J84.116 — Cryptogenic organizing pneumonia (cryptogenic organizing), J84.117 — Desquamative interstitial pneumonia (desquamative interstitial), J84.178 — Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere (interstitial, lymphocytic), J84.2 — Lymphoid interstitial pneumonia (lymphoid interstitial), J84.89 — Other specified interstitial pulmonary diseases (organizing), J84.9 — Interstitial pulmonary disease, unspecified (interstitial), +104 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of J82.81 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 J82.81 with these 2 related codes in Claim Check

Hierarchy

Referenced by Excludes2 notes

  • D72.1 — Eosinophilia[Excludes2](via J82.-): “pulmonary eosinophilia (J82.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Code First instructions

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders [CMS-HCC]— CMS-HCC V28 · 2026

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. 3,998 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Eosinophilia (allergic) (idiopathic) (secondary), pulmonary NEC, chronic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), eosinophilic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), eosinophilic, chronic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pneumonitis (acute) (primary), eosinophilic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pneumonitis (acute) (primary), eosinophilic, chronic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes

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 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
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release 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. "J82.81 — Chronic eosinophilic pneumonia." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/j82.81-chronic-eosinophilic-pneumonia

Change history

  • FY2021 — October 1, 2020
    Added to the code set
    Chronic eosinophilic pneumonia
    FY2021 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to J82.81 in its code family, with their registry titles.

View all codes in the J82 family