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J84.1 ICD-10-CM Code: Other interstitial pulmonary diseases with fibrosis

J84.1 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupJ84.1

FY 2026 Apr update / Diseases of the respiratory system (J00-J99) / Other respiratory diseases principally affecting the interstitium (J80-J84)

J84.1

Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidance

Other interstitial pulmonary diseases with fibrosis

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

N/A

—

Not mapped

CMS-HCC V24

N/A

—

Not mapped

ACA/HHS

N/A

—

Not mapped

ESRD/PACE

N/A

—

Not mapped

RXHCC

N/A

—

Not mapped

Code Book Path

Official
J84Other interstitial pulmonary diseasesJ84.1Other interstitial pulmonary diseases with fibrosis

Inclusion Terms

Official

No inclusion terms are included in this display for J84.1. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • certain conditions originating in the perinatal period (P04-P96)Inherited from J00-J99, J84
  • certain infectious and parasitic diseases (A00-B99)Inherited from J00-J99, J84
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from J00-J99, J84
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Inherited from J00-J99, J84
  • endocrine, nutritional and metabolic diseases (E00-E88)Inherited from J00-J99, J84
  • injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from J00-J99, J84
  • neoplasms (C00-D49)Inherited from J00-J99, J84
  • smoke inhalation (T59.81-)Inherited from J00-J99, J84
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from J00-J99, J84
  • lung diseases due to external agents (J60-J70)Inherited from J00-J99, J84

Related Codes

Official
J84.10Pulmonary fibrosis, unspecifiedJ84.11Idiopathic interstitial pneumoniaJ84.17Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere

Includes

Official

No Includes notes are included in this display for J84.1. Check the code and parent instructions in the Code Book.

Excludes 1

Official
  • pulmonary fibrosis (chronic) following radiation (J70.1)
  • drug-induced interstitial lung disorders (J70.2-J70.4)Inherited from J84
  • interstitial emphysema (J98.2)Inherited from J84

Code First

Official

No Code First sequencing instructions are included in this display for J84.1. Check the code and parent instructions in the Code Book.

Use Additional

Official
  • code, where applicable, to identify:Inherited from J00-J99
  • exposure to environmental tobacco smoke (Z77.22)Inherited from J00-J99
  • exposure to tobacco smoke in the perinatal period (P96.81)Inherited from J00-J99
  • history of tobacco dependence (Z87.891)Inherited from J00-J99
  • occupational exposure to environmental tobacco smoke (Z57.31)Inherited from J00-J99
  • tobacco dependence (F17.-)Inherited from J00-J99
  • tobacco use (Z72.0)Inherited from J00-J99

Code Also

Official
  • , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
  • , if applicable, associated conditionInherited from J84

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Code
J84.1
Description
Other interstitial pulmonary diseases with fibrosis
HCC (V28)
No CMS-HCC V28 mapping
RAF reference coefficient
—
Billable
No
Payment year
2026

Coder workflow notes

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What This Code Means

J84.1 is the ICD-10-CM diagnosis code for other interstitial pulmonary diseases with fibrosis. J84.1 sits in the ICD-10-CM chapter for diseases of the respiratory system (j00-j99), within the section covering other respiratory diseases principally affecting the interstitium (j80-j84).

Header codes like J84.1 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for J84.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Excludes 1, Do NOT code together

  • pulmonary fibrosis (chronic) following radiation (J70.1)

Code Also

  • , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)

Child Codes

J84.10Pulmonary fibrosis, unspecified
HCC 280
J84.11Idiopathic interstitial pneumonia
J84.17Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere

Code Hierarchy

└J84Other interstitial pulmonary diseases└J84.1Other interstitial pulmonary diseases with fibrosis
└J84.1Other interstitial pulmonary diseases with fibrosis

Also searched as

  • J84 1
  • J841

More on J84.1

Referenced in blog posts

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