J84.10
Pulmonary fibrosis, unspecified
J84.10 (also written J8410) is a billable ICD-10-CM diagnosis code for pulmonary fibrosis, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 24 codes in category J84 (Other interstitial pulmonary diseases). The Alphabetic Index lists it under 12 entries. Its coding notes include a Use additional code instruction, a Code also instruction, 3 Excludes1 entries and 10 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (7 notes)
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
- , if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
- , if applicable, associated condition
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- lung diseases due to external agents (J60-J70)
Also from chapter/block level (9 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- smoke inhalation (T59.81-)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Respiratory clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Inclusion terms
Conditions classified to this code.
- Capillary fibrosis of lung
- Cirrhosis of lung (chronic) NOS
- Fibrosis of lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) NOS
- Induration of lung (chronic) NOS
- Postinflammatory pulmonary fibrosis
Notes
Also from chapter/block level (1 note)
- When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 12 entries
- Block, blocked, alveolocapillary
- Cirrhosis, cirrhotic (hepatic) (liver), lung (chronic)
- Cirrhosis, cirrhotic (hepatic) (liver), pulmonary
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial), capillary
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial), diffuse (idiopathic)
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial), diffuse (idiopathic), chemicals, gases, fumes or vapors (inhalation)
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial), diffuse (idiopathic), interstitial
- Fibrosis, fibrotic, lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial), postinflammatory
- Fibrosis, fibrotic, pulmonary
- Induration, indurated, lung (black) (chronic) (fibroid)
- Syndrome, alveolocapillary block