A70 — Chlamydia psittaci infections
A70 is a billable, specific ICD-10-CM code for chlamydia psittaci infections. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Ornithosis
- Parrot fever
- Psittacosis
Other codes that can never be billed with A70
These codes carry an Excludes1 note pointing at A70. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A70 alone.
- J16Pneumonia due to other infectious organisms, not elsewhere classified
Risk adjustment
A70 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
A70 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57205Billing and Coding: Oximetry Services
How A70 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 A70.
- Ornithosis
- Parrot fever
- Psittacosis
- Chlamydia, chlamydial›psittaci(infection)
- Fever›parrot
- Pneumonia›psittacosis
- Infection, infected, infective›Chlamydia, chlamydial›psittaci
- Pneumonia›in›ornithosis
- Pneumonia›in›psittacosis
Questions about A70
- Is A70 a billable ICD-10-CM code?
- Yes. A70 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A70 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Other diseases caused by chlamydiae (A70-A74).