J84.842 — Pulmonary interstitial glycogenosis
J84.842 is a billable, specific ICD-10-CM code for pulmonary interstitial glycogenosis. It is valid for submission on a claim.
Risk adjustment
J84.842 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
J84.842 is named in 4 Medicare coverage policies — 4 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)
- A56784Billing and Coding: Pulmonary Stress Testing
- A57224Billing and Coding: Respiratory Care
How J84.842 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 J84.842.
- Glycogenosis›pulmonary interstitial
Related codes at this level
Codes that share J84.84. If J84.842 is not quite right, the correct code is usually one of these.
Questions about J84.842
- Is J84.842 a billable ICD-10-CM code?
- Yes. J84.842 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J84.842 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Other respiratory diseases principally affecting the interstitium (J80-J84).