J18.9 — Pneumonia, unspecified organism
J18.9 is a billable, specific ICD-10-CM code for pneumonia, unspecified organism. It is valid for submission on a claim.
Other codes that can never be billed with J18.9
These codes carry an Excludes1 note pointing at J18.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading J18.9 alone.
- J16Pneumonia due to other infectious organisms, not elsewhere classified
Risk adjustment
J18.9 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
J18.9 is named in 17 Medicare coverage policies — 17 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
How J18.9 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 J18.9.
- Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
- Infection, infected, infective›lung
- Pneumonia›atypical NEC
Related codes at this level
Codes that share J18. If J18.9 is not quite right, the correct code is usually one of these.
Questions about J18.9
- Is J18.9 a billable ICD-10-CM code?
- Yes. J18.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does J18.9 sit in the tabular list?
- Diseases of the respiratory system (J00-J99), in the block Influenza and pneumonia (J09-J18).