A70 vs J16
A70 (Chlamydia psittaci infections) compared with J16 (Pneumonia due to other infectious organisms, not elsewhere classified), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. J16 carries an Excludes1 note covering A70: “ornithosis (A70)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| A70Chlamydia psittaci infections | J16Pneumonia due to other infectious organisms, not elsewhere classified | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Chlamydia psittaci infections is a billable ICD-10-CM diagnosis code (A70). | Pneumonia due to other infectious organisms, not elsewhere classified is a non-billable ICD-10-CM category code (J16). |
| Includes | Ornithosis Parrot fever Psittacosis | — |
| Use additional code | — | code, if applicable, to identify resistance to antimicrobial drugs (Z16.-) |
| Code first | — | , if applicable, associated influenza (J09.X1, J10.0-, J11.0-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources