2027 ICD-10-CM Diagnosis Code J82.81Chronic eosinophilic pneumonia
ICD-10-CM Codes›J00–J99›J80-J84›J82
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 280
- Chronic Condition
J82.81 is a billable ICD-10-CM diagnosis code for chronic eosinophilic pneumonia. 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. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 4 closely related codes. Coders also document this condition as chronic eosinophilic pneumonia due to aspiration into lower respiratory tract. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.
For Medicare Advantage risk adjustment, J82.81 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
J82.81 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.
- Chronic eosinophilic pneumonia due to aspiration into lower respiratory tract
- Chronic eosinophilic pneumonia due to connective tissue disease
- Chronic eosinophilic pneumonia due to infection
- Cryptogenic pulmonary eosinophilia
- Idiopathic eosinophilic pneumonitis
- Secondary chronic eosinophilic pneumonia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J82.81: its own notes plus those printed at J82 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.
- Eosinophilic pneumonia, NOS
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)
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 J82.81, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming J82.81: its condition is not part of those codes, and both may be reported when the patient has both.
- D72.1 Eosinophiliapulmonary eosinophilia (J82.-) names J82.-, which includes this code
- Block J09-J18 Influenza and pneumoniaallergic or eosinophilic pneumonia (J82) names J82, which includes this code
Code First 1
These codes say to code first a condition named in the note, and J82.81 is one of the conditions named.
- J93.12 Secondary spontaneous pneumothorax
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
eosinophilic J82.81
chronic J82.81
Pneumonitis (acute) (primary) See Also: Pneumonia; J98.4
eosinophilic J82.81
chronic J82.81
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Chronic Eosinophilic Pneumonia
chronic inflammatory disorder of the lungs characterized by the presence of eosinophils in the interalveolar septa and alveolar spaces and peripheral blood eosinophilia. chest x-rays reveal peripheral infiltrates. approximately half of the patients have history of asthma or atopic disease. signs and symptoms include fever, dyspnea, cough, and weight loss. following treatment with corticosteroids, the eosinophilic infiltrates in the lungs disappear, resulting in dramatic clinical improvement.Pulmonary Eosinophilia
a condition characterized by infiltration of the lung with eosinophils due to inflammation or other disease processes. major eosinophilic lung diseases are the eosinophilic pneumonias caused by infections, allergens, or toxic agents.
Patient EducationClinical
Eosinophilic Disorders
Eosinophils are a type of white blood cell. They help fight off infections and play a role in your body's immune response. They can also build up and cause inflammation.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code History & ChangesHistory
Replacement J82.81 replaces the following previously assigned code(s):
- J82 - Pulmonary eosinophilia, not elsewhere classified
Questions About J82.81Overview
What is the ICD-10 code for chronic eosinophilic pneumonia?
The ICD-10-CM code for chronic eosinophilic pneumonia is J82.81 (sometimes written as J8281). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J82.81 (Pulmonary eosinophilia, not elsewhere classified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report chronic eosinophilic pneumonia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J82.81 group to?
When chronic eosinophilic pneumonia 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.
Is J82.81 a CC or MCC?
CMS lists J82.81 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 4 closely related codes in its exclusion list.
What HCC is J82.81?
J82.81 (chronic eosinophilic pneumonia) 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 111 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 229.
Does J82.81 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, J82.81 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.
