Method to Calculate Hormone Therapy for Men with Prostate Cancer
Source: Shahinian VB, Kuo YF, Freeman JL, Goodwin JS.
Risk of fracture after androgen deprivation for prostate cancer.
N Engl J Med 2005 Jan 13;352(2):154-64.
GnRH Agonists: HCPCS codes J9202, J1950, J9217, J9218, J9219 (23)
Number of GnRH Agonist Doses: Calculated from each instance of a GnRH agonist
HCPCS J-code noted on separate days. GnRH agonists are generally administered as depot
injections with the dosage given depending on the intended regimen; usually once a month,
once every three month or once every four month regimens. The dosage for a given injection
can be determined from the unit designation (1, 3 or 4) of the "carrier
miles/time/units/serv count" field of the physician services claims or if unavailable,
from the "revenue center unit count" field of the outpatient claims. All doses can be
converted to a once a month regimen, ie. an injection given to cover a 3 month
period was counted as 3 doses. If the unit designation is not 1, 3 or 4 (3.9% of
cases), it can be set to 1. Only one claim per day should be counted (2.7% of cases had
"duplicate" claims on the same day).