US Oncology Reports First Quarter 20...(7.8 10224 3.4 Radiation treatment...),Health

Radiation treatments/ diagnostic

scans (2)(4) 3,685 3,614 2.0 3,680 0.1

Daily Same Store Statistics:

Medical oncology visits (1) 9,872 9,551 3.4 9,857 0.2

Radiation treatments/ diagnostic

scans (2)(4) 3,449 3,495 (1.3) 3,461 (0.3)

Other Statistics:

Radiation oncology facilities(3)(4) 91 90 1.1 88 3.4

PET systems 34 34 - 34 -

New patients enrolled in research

studies during the period 996 761 30.9 809 23.1

Accounts receivable days outstanding 34 37 (8.1) 33 3.0

Notes to Key Operating Statistics:

(1) Medical oncology visits include information for practices affiliated

under comprehensive service agreements only, and do not include the

results of OPS practices.

(2) Represents technology-based treatments, including IMRT treatments

and diagnostic scans, provided through our integrated cancer centers

and radiation-only facilities.

(3) The first quarter of 2008 includes 79 integrated cancer centers and 12

radiation-only facilities while the first quarter of 2007 includes 79

integrated cancer centers and 11 radiation-only facilities. The

fourth quarter of 2007 includes 77 integrated cancer centers and 11

radiation-only facilities.

(4) Radiation treatments/diagnostic scans and facilities do not include

cancer centers operated by unconsolidated joint ventures in which the

Company or an affiliated practice has a financial interest.

US ONCOLOGY HOLDINGS, INC.

RECONCILIATION OF ADJUSTED EBITDA TO CASH FROM OPERATING ACTIVITIES

(in thousands)

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