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A37.91

A37.91: Whooping cough, unspecified species with pneumonia

Billable / specific codeICD-10-CM

A37.91 is a billable, specific ICD-10-CM code for whooping cough, unspecified species with pneumonia. It is valid for submission on a claim.

Check A37.91 with the rest of the claim: free scrubber

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

A37.91 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52466Nebulizers - Policy Article
  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
  • A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
  • A56730Billing and Coding: Respiratory Therapy and Oximetry Services

Alphabetic index entries that lead here

  • Whooping cough›with pneumonia
  • Pneumonia›in›whooping cough

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under A37.9

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.