ICD-10-CM 2027
ICD-10 code for Daae disease
From the official ICD-10-CM alphabetic index entry “Daae (-Finsen) disease (epidemic pleurodynia)”. Page updated September 29, 2026.
About coding Daae disease
The ICD-10-CM code for Daae disease is B33.0 (Epidemic myalgia).
Within B33 (other viral diseases, not elsewhere classified), B33.0 is specifically for epidemic myalgia. Related codes cover Ross River disease (B33.1), viral carditis (B33.2), retrovirus infections, not elsewhere classified (B33.3), Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] (B33.4) and other specified viral diseases (B33.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 193 (Simple Pneumonia and Pleurisy with MCC, relative weight 1.2825), DRG 194 (Simple Pneumonia and Pleurisy with CC, relative weight 0.7888) and DRG 195 (Simple Pneumonia and Pleurisy without CC/MCC, relative weight 0.6063), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Daae disease ICD-10 codes
What is the ICD-10 code for Daae disease?
- B33.0 — Epidemic myalgia.
Is B33.0 billable?
- Yes. B33.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B33.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B33.0 as a principal diagnosis.
Is B33.0 a CC or MCC?
- No. B33.0 is neither a CC nor an MCC under MS-DRG v44.0.