2027 ICD-10-CM Diagnosis Code J84.841Neuroendocrine cell hyperplasia of infancy
ICD-10-CM Codes›J00–J99›J80-J84›J84
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Chronic Condition
J84.841 is a billable ICD-10-CM diagnosis code for neuroendocrine cell hyperplasia of infancy. 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, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 78 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.
J84.841 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 112 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 112, ESRD (V21) category 112, ESRD (V24) category 112, and RxHCC Part D (V08) category 227 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
J84.841 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
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.
- Neuroendocrine cell hyperplasia of infancy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to J84.841: its own notes plus those printed at J84.8, J84, and Chapter 10. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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, 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 J84.841, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Neuroendocrine Cell Hyperplasia of Infancy
a form of interstitial lung disease characterized by increased numbers of pulmonary neuroendocrine cells, typically presenting in the first year of life with persistent tachypnea, retractions, crackles and hypoxemia that has a highly specific chest ct pattern that includes ground-glass opacities and air-trapping.
Patient EducationClinical
Interstitial Lung Diseases
Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J84.841 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J84.841Overview
What is the ICD-10 code for neuroendocrine cell hyperplasia of infancy?
The ICD-10-CM code for neuroendocrine cell hyperplasia of infancy is J84.841 (sometimes written as J84841). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is J84.841 (Other interstitial lung diseases of childhood) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report neuroendocrine cell hyperplasia of infancy on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does J84.841 group to?
When neuroendocrine cell hyperplasia of infancy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 198, 197, 196, with relative weights from 0.7256 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is J84.841 a CC or MCC?
CMS lists J84.841 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 78 closely related codes in its exclusion list.
Can J84.841 be reported with J69.1?
Not as a rule. The Excludes1 note at J84.8, which applies to J84.841, lists "exogenous lipoid pneumonia (J69.1)". 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).
Does J84.841 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. J84.841 mapped to HCC 112 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders), ESRD (V21) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders), ESRD (V24) category 112 (Fibrosis of Lung and Other Chronic Lung Disorders), and RxHCC Part D (V08) category 227 (Pulmonary Fibrosis, Except Idiopathic).
