REVENUES The Company’s Revenues by segment and by payers/customer groups were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, 2025 | | Three Months Ended June 30, 2024 | | North America | | Europe | | Other | | Total | | North America | | Europe | | Other | | Total | Payer/Customer | | | | | | | | | | | | | | | | Dx | | | | | | | | | | | | | | | | Clients | 24 | % | | — | % | | — | % | | 24 | % | | 24 | % | | — | % | | — | % | | 24 | % | Patients | 10 | % | | — | % | | — | % | | 10 | % | | 10 | % | | — | % | | — | % | | 10 | % | Medicare and Medicaid | 8 | % | | — | % | | — | % | | 8 | % | | 8 | % | | — | % | | — | % | | 8 | % | Third party | 36 | % | | — | % | | — | % | | 36 | % | | 36 | % | | — | % | | — | % | | 36 | % | Total Dx revenues by payer | 78 | % | | — | % | | — | % | | 78 | % | | 78 | % | | — | % | | — | % | | 78 | % | BLS | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pharmaceutical, biotechnology, and medical device companies | 9 | % | | 9 | % | | 4 | % | | 22 | % | | 9 | % | | 9 | % | | 4 | % | | 22 | % | Total Revenues | 87 | % | | 9 | % | | 4 | % | | 100 | % | | 87 | % | | 9 | % | | 4 | % | | 100 | % | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, 2025 | | Six Months Ended June 30, 2024 | | North America | | Europe | | Other | | Total | | North America | | Europe | | Other | | Total | Payer/Customer | | | | | | | | | | | | | | | | Dx | | | | | | | | | | | | | | | | Clients | 24 | % | | — | % | | — | % | | 24 | % | | 24 | % | | — | % | | — | % | | 24 | % | Patients | 10 | % | | — | % | | — | % | | 10 | % | | 10 | % | | — | % | | — | % | | 10 | % | Medicare and Medicaid | 8 | % | | — | % | | — | % | | 8 | % | | 8 | % | | — | % | | — | % | | 8 | % | Third party | 36 | % | | — | % | | — | % | | 36 | % | | 36 | % | | — | % | | — | % | | 36 | % | Total Dx revenues by payer | 78 | % | | — | % | | — | % | | 78 | % | | 78 | % | | — | % | | — | % | | 78 | % | BLS | | | | | | | | | | | | | | | | Pharmaceutical, biotechnology, and medical device companies | 9 | % | | 9 | % | | 4 | % | | 22 | % | | 9 | % | | 9 | % | | 4 | % | | 22 | % | Total Revenues | 87 | % | | 9 | % | | 4 | % | | 100 | % | | 87 | % | | 9 | % | | 4 | % | | 100 | % |
Revenues in the U.S. were $2,931.6 (83.1%) and $2,698.8 (83.8%) for the three months ended June 30, 2025, and 2024, respectively, and were $5,745.4 (83.6%) and $5,353.4 (83.7%) for the six months ended June 30, 2025, and 2024, respectively. Accounts Receivable, Unbilled Services, and Unearned Revenue The following table provides information about accounts receivable, unbilled services, and unearned revenue from contracts with customers: | | | | | | | | | | | | | June 30, 2025 | | December 31, 2024 | Dx accounts receivable | $ | 1,410.6 | | | $ | 1,259.3 | | BLS accounts receivable | 750.1 | | | 729.5 | | Less: BLS allowance for credit losses | (40.1) | | | (44.7) | | Accounts receivable, net | $ | 2,120.6 | | | $ | 1,944.1 | | | | | | Gross unbilled services | $ | 162.0 | | | $ | 160.5 | | Less: reserve for unbilled services | (5.9) | | | (7.6) | | Unbilled services | $ | 156.1 | | | $ | 152.9 | |
Revenues recognized during the period that were included in the unearned revenue balance at the beginning of the period were $34.4 and $26.8 for the three months ended June 30, 2025, and 2024, respectively, and were $103.3 and $77.8 for the six months ended June 30, 2025, and 2024, respectively. Allowance for Credit Losses BLS estimates future expected credit losses on accounts receivable and unbilled services over the remaining collection period of the instrument. The rollforward for the allowance for credit losses was as follows: | | | | | | | | | | | | | | | | | | | Accounts Receivable | | Unbilled Services | | Total | Allowance for credit losses at December 31, 2024 | $ | 44.7 | | | $ | 7.6 | | | $ | 52.3 | | Credit loss expense | 2.5 | | — | | 2.5 | | Write offs | (9.1) | | | (2.1) | | | (11.2) | | Foreign currency impact | 2.0 | | | 0.4 | | | 2.4 | | Allowance for credit losses at June 30, 2025 | $ | 40.1 | | | $ | 5.9 | | | $ | 46.0 | |
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