2027 ICD-10-CM Diagnosis Code J84.10Pulmonary fibrosis, unspecified
ICD-10-CM Codes›J00–J99›J80-J84›J84
- Billable — Valid for Submission
- Risk Adjusts — HCC 280
- Chronic Condition
J84.10 is a billable ICD-10-CM diagnosis code for pulmonary fibrosis, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 196 through 198. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.
For Medicare Advantage risk adjustment, J84.10 maps to CMS-HCC Category 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders) under the V28 model, adding a risk factor of about 0.319 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
J84.10 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Atrophic fibrosis of lung
- Calcified granuloma of lung
- Chronic fibrosing pulmonary aspergillosis
- Chronic fibrosis of lung
- Chronic induration of lung
- Chronic interstitial pneumonitis
- Chronic pulmonary aspergillosis
- Chronic pulmonary fibrosis caused by vapor
- Chronic respiratory condition caused by vapor
- Confluent fibrosis of lung
- Congenital anomaly of endocrine ovary
- Diffuse interstitial pulmonary fibrosis
- Drug induced pulmonary fibrosis
- Familial pulmonary fibrosis
- Fibrosis of lung
- Fibrosis, neurodegeneration, cerebral angiomatosis syndrome
- Hereditary fibrosing poikiloderma, tendon contractures, myopathy, pulmonary fibrosis syndrome
- Hereditary sclerosing poikiloderma
- Induration of lung
- Interstitial pulmonary fibrosis due to inhalation of drug
- Interstitial pulmonary fibrosis due to inhalation of substance
- Localized pulmonary fibrosis
- Lung fibrosis, immunodeficiency, 46,XX gonadal dysgenesis syndrome
- Massive fibrosis of lung
- Multiple hyalinizing granuloma of lung
- Multiple nodules of lung
- Nodular hyperplasia of liver
- Nodular regenerative hyperplasia of liver
- Nodule of liver
- Ovarian dysgenesis
- Perialveolar fibrosis of lung
- Peribronchial fibrosis of lung
- PF-ILD-progressive fibrosing interstitial lung disease
- Plasma cell granuloma of lung
- Post-inflammatory pulmonary fibrosis
- Pulmonary aspergillosis
- Pulmonary emphysema co-occurrent with fibrosis of lung
- Pulmonary fibrosis due to Hermansky-Pudlak syndrome
- Pulmonary fibrosis due to paracoccidioidomycosis
- Pulmonary fibrosis, hepatic hyperplasia, bone marrow hypoplasia syndrome
- Pulmonary granuloma
- Pulmonary hyalinizing granuloma
- Pure gonadal dysgenesis
- Pure gonadal dysgenesis 46,XX
- Respiratory condition caused by vapor
- Single hyalinizing granuloma of lung
- Solitary nodule of lung
- Tendon contracture
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J84.10: its own notes plus those printed at J84.1, J84, and Chapter 10. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- 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
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- pulmonary fibrosis (chronic) following radiation (J70.1)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- if applicable, pulmonary fibrosis (chronic) due to inhalation of chemicals, gases, fumes or vapors (J68.4)
- if applicable, associated condition
Notes
General instructions on how these codes are used.
- 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).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name J84.10, its category, or a range that includes it.
Code First 1
These codes say to code first a condition named in the note, and J84.10 is one of the conditions named.
- U09.9 Post COVID-19 condition, unspecifiedpulmonary fibrosis (J84.10)
Code Also 2
These codes say J84.10 may also be needed to fully describe the condition. The note gives no sequencing direction.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
alveolocapillary J84.10
Cirrhosis, cirrhotic (hepatic) (liver) K74.60
lung (chronic) J84.10
pulmonary J84.10
lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) J84.10
capillary J84.10
diffuse (idiopathic) J84.10
chemicals, gases, fumes or vapors (inhalation) See Also: Disease, respiratory, chronic, due to chemicals, gases, fumes or vapors; J84.10
interstitial J84.10
postinflammatory J84.10
pulmonary See Also: Fibrosis, lung; J84.10
lung (black) (chronic) (fibroid) See Also: Fibrosis, lung; J84.10
Syndrome See Also: Disease;
alveolocapillary block J84.10
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Pulmonary Fibrosis
a process in which normal lung tissues are progressively replaced by fibroblasts and collagen causing an irreversible loss of the ability to transfer oxygen into the bloodstream via pulmonary alveoli. patients show progressive dyspnea finally resulting in death.
Patient EducationClinical
Pulmonary Fibrosis
Pulmonary fibrosis is a condition in which the tissue deep in your lungs becomes scarred over time. This tissue gets thick and stiff. That makes it hard for you to catch your breath, and your blood may not get enough oxygen.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J84.10 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J84.10Overview
What is the ICD-10 code for pulmonary fibrosis, unspecified?
The ICD-10-CM code for pulmonary fibrosis, unspecified is J84.10 (sometimes written as J8410). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J84.10 (Other interstitial pulmonary diseases with fibrosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pulmonary fibrosis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J84.10 group to?
When pulmonary fibrosis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 198, 197, 196, with relative weights from 0.7256 to 1.8335 depending on complications. Higher weights mean higher Medicare reimbursement.
Can J84.10 be reported with J70.1?
Not as a rule. The Excludes1 note at J84.1, which applies to J84.10, lists "pulmonary fibrosis (chronic) following radiation (J70.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of J84.10?
Under the General Equivalence Mappings, pulmonary fibrosis, unspecified converts to ICD-9-CM 515 (postinflam pulm fibrosis). The mapping is approximate, so confirm the match fits the documentation.
What HCC is J84.10?
J84.10 (pulmonary fibrosis, unspecified) maps to CMS-HCC Category 280 (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders), commonly written as HCC 280, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 112 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 227.
Does J84.10 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, J84.10 adds a risk adjustment factor of about 0.319 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.209 to 0.390 depending on the payment segment). A more severe related category (HCC 276, HCC 277, HCC 278, and HCC 279) supersedes it when both are reported. See the full factor table on the HCC 280 category page.
