J84.02 — Pulmonary alveolar microlithiasis
J84.02 is a billable, specific ICD-10-CM code for pulmonary alveolar microlithiasis. It is valid for submission on a claim.
Risk adjustment
J84.02 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 280 Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders0.319 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
J84.02 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
- A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
- A57205Billing and Coding: Oximetry Services
- A57224Billing and Coding: Respiratory Care
How J84.02 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to J84.02.
- Microlithiasis, alveolar, pulmonary
Related codes at this level
Codes that share J84.0. If J84.02 is not quite right, the correct code is usually one of these.
Questions about J84.02
- Is J84.02 a billable ICD-10-CM code?
- Yes. J84.02 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J84.02 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Other respiratory diseases principally affecting the interstitium (J80-J84).