J84.112: Idiopathic pulmonary fibrosis
J84.112, idiopathic pulmonary fibrosis, is listed as a covered diagnosis in 7 Medicare billing and coding articles that apply to 11 HCPCS Level II codes, including U0002 (2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19)…), U0001 (Cdc 2019 novel coronavirus (2019-ncov) real-time rt-pcr…), G0238 (Therapeutic procedures to improve respiratory function…). The articles come from 4 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with J84.112 as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| U0002 | 2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19), any technique, multiple types or subtypes (includes all targets), non-cdc | Carrier judgment | — | 4 |
| U0001 | Cdc 2019 novel coronavirus (2019-ncov) real-time rt-pcr diagnostic panel | Carrier judgment | — | 4 |
| G0238 | Therapeutic procedures to improve respiratory function, other than described by g0237, one on one, face to face, per 15 minutes (includes monitoring) | Carrier judgment | — | 2 |
| G0237 | Therapeutic procedures to increase strength or endurance of respiratory muscles, face to face, one on one, each 15 minutes (includes monitoring) | Carrier judgment | — | 2 |
| G0239 | Therapeutic procedures to improve respiratory function or increase strength or endurance of respiratory muscles, two or more individuals (includes monitoring) | Carrier judgment | — | 2 |
| J9312 | Injection, rituximab, 10 mg | Special coverage instructions apply | — | 1 |
| Q5123 | Injection, rituximab-arrx, biosimilar, (riabni), 10 mg | Carrier judgment | — | 1 |
| Q5119 | Injection, rituximab-pvvr, biosimilar, (ruxience), 10 mg | Carrier judgment | — | 1 |
| Q5115 | Injection, rituximab-abbs, biosimilar, (truxima), 10 mg | Special coverage instructions apply | — | 1 |
| J9260 | Injection, methotrexate sodium, 50 mg | Special coverage instructions apply | — | 1 |
| J9215 | Injection, interferon, alfa-n3, (human leukocyte derived), 250,000 iu | Special coverage instructions apply | — | 1 |
Medicare policy articles listing J84.112
- A55639: Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions (WPS Insurance Corporation (MAC - Part A, MAC - Part B); 6 Level II codes)
- A56717: Billing and Coding: Respiratory Therapy (Respiratory Care) (Palmetto GBA (MAC - Part A); 3 Level II codes). LCD with the same title: L34430
- A58710: Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing (Palmetto GBA (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L38988, L39001, L39038, L39044
- A58720: Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L38988, L39001, L39038, L39044
- A58761: Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing (WPS Insurance Corporation (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L38988, L39001, L39038, L39044
- A58747: Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing (CGS Administrators, LLC (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L38988, L39001, L39038, L39044
- A57224: Billing and Coding: Respiratory Care (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L34149
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Other J84 diagnoses (Other interstitial pulmonary diseases)
- 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
- J84.117 — Desquamative interstitial pneumonia
- J84.10 — Pulmonary fibrosis, unspecified
- J84.170 — Interstitial lung disease with progressive fibrotic phenotype in…
- J84.178 — Other interstitial pulmonary diseases with fibrosis in diseases…
- J84.01 — Alveolar proteinosis
- J84.02 — Pulmonary alveolar microlithiasis
- J84.03 — Idiopathic pulmonary hemosiderosis
- J84.2 — Lymphoid interstitial pneumonia
- J84.81 — Lymphangioleiomyomatosis
- J84.82 — Adult pulmonary Langerhans cell histiocytosis
- J84.89 — Other specified interstitial pulmonary diseases
Frequently asked questions
Does Medicare cover J84.112 (Idiopathic pulmonary fibrosis)?
Medicare covers items and services, not diagnoses. 7 Medicare billing and coding articles list J84.112 as a covered diagnosis for 11 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 J84.112?
The Level II codes from the policies most specific to this diagnosis are U0002 (2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19)…, 4 articles); U0001 (Cdc 2019 novel coronavirus (2019-ncov) real-time rt-pcr…, 4 articles); G0238 (Therapeutic procedures to improve respiratory function…, 2 articles); G0237 (Therapeutic procedures to increase strength or endurance…, 2 articles); G0239 (Therapeutic procedures to improve respiratory function or…, 2 articles). Code choice depends on the item supplied; check each code's descriptor.
Which Medicare policy articles list J84.112?
A55639 (Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions); A56717 (Billing and Coding: Respiratory Therapy (Respiratory Care)); A58710 (Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing), and 4 more articles.
What is ICD-10-CM code J84.112?
J84.112 is the ICD-10-CM code for idiopathic pulmonary fibrosis, in category J84 (Other interstitial pulmonary diseases), chapter 10: Diseases of the respiratory system.
Next steps
- Run a reimbursement report for a device billed under U0002
- Watch U0002 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for U0002
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.
Chapter 10: Diseases of the respiratory system · All diagnoses · HCPCS lookup