A70 Chlamydia psittaci infections

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Ornithosis
• Parrot fever
• Psittacosis

Applies from A70 Chlamydia psittaci infections

Applicable to

• Ornithosis
• Parrot fever
• Psittacosis

MS-DRG index

Defines the logic of DRG(s) 865-866 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 073.9 Ornithosis, unspecified (approximate)

Code annotations containing back-references to A70

Back-references to A70

• Type 1 Excludes: J16 Pneumonia due to other infectious organisms, not elsewhere classified ("ornithosis (A70)")

Back-references to A70

• Type 1 Excludes: J16 Pneumonia due to other infectious organisms, not elsewhere classified ("ornithosis (A70)")

Diagnosis Index entries for A70

• Chlamydia, chlamydial › psittaci (infection)
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › parrot
• Infection, infected, infective (opportunistic) › Chlamydia, chlamydial › psittaci
• Ornithosis
• Parrot fever
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › ornithosis
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › psittacosis
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › psittacosis
• Psittacosis

Nearby codes

• A70 Chlamydia psittaci infections (this code)